eChapters

27.1 Introduction

Crop improvement depends on genetic variation present in nature or created by hybridization followed by segregation and recombination. Again, gene transfers are possible only from the lines and species that are sexually compatible with the concerned species. Interspecific gene transfers pose many problems, including the loss of F₁ hybrids during embryo development due to abortion of the endosperm in the developing hybrid seeds. Embryo rescue technique was developed to rescue such interspecific hybrid embryos, and it has been widely used for this purpose. It is to be mentioned that embryo rescue can be used only in such cases where sexual hybridization is successful in producing zygotes that begin to develop into embryos.

Besides, the technique of somatic hybridization by protoplast fusion was developed to enable gene transfer from the species that do not produce zygotes on hybridization. This method has been extensively used and some useful lines have been derived. But this method is limited to utilization of genes present in plant species. Again, the results of somatic hybridization are unpredictable since many somatic hybrids fail to regenerate complete plants and the transfer of specific genes or groups of genes depends entirely on chance.

The recombinant DNA technology (also called genetic engineering) has permitted the transfer of genes from any organism into any organism. Besides, chemically synthesized genes can be transferred and integrated into genomes of various organisms to enable the expression of these genes. A gene transferred into an organism by genetic engineering is called a transgene. 

Ethylene is a primary plant hormone involved in the senescence of plant tissues including flowers and leaves. In carnation flowers, inhibition of the synthesis or action of ethylene delays the onset of senescence symptoms and lengthens the vase life of flowers. Leaves of cut chrysanthemum of some cultivars frequently become yellow, sometimes prior to the onset of flower senescence, in response to exogenous ethylene. Generation of transgenic plants with suppressed production or action of ethylene is an excellent way to lengthen the longevity of these ornamental plants. This paper reviews our studies on generation and characterization of carnations with reduced ethylene production and chrysanthemum with reduced sensitivity to ethylene.

India is a huge importer of crude oil and spends about Rs. 1,200 billion of foreign exchange every year to meet 75% of its oil needs (Anand, 2006). This has affected its balance of payment adversely, especially after the unprecedented rise incrude oil prices. Being an agricultural country endowed with varied climates, nutrient-rich soil and ability to grow many different crops, India offers a great promise as a producer of surplus raw material for biodiesel and bioethanol production. India’s biofuel production currently accounts for only 1 percent of global production (Shinoj et al., 2012). Although all oils can be used, edible oils as a source for biodiesel production have to be ruled out because they are required for cooking and food purposes. Therefore, non-edible oils are the premier raw material for biodiesel production in India. Seeds rich in these oils are mostly produced by perennial species. Hence these trees are referred to as tree-borne oilseed species (TBOS) and they produce TBOs (Aurora and Kumar, 2015). TBOs are cultivated/grown in the country under different agro-climatic conditions in a scattered form in forest and non-forest areas as well as in waste land/deserts/hilly areas. The country has enormous potential of oilseeds of tree origin like mahua (Madhuca indica),neem (Azadirachta indica), simarouba (Simarouba glauca), karanja (Pongamia pinnata), ratanjyot (Jatropha curcas), jojoba (Simmondsia chinesis), cheura (Diploknema butyracea), kokum (Garcinia indica),wild apricot (Prunus armeniaca), wild walnut (Aleurites molucana), kusum (Schleichera oleosa), tung (Vernicia fordii), etc. The best characteristic is that it can be grown and established in the wasteland and have varied agro-climatic conditions. (Aurora and Kumar, 2015)

Tree tomato belongs to the family solanaceae, genus Cyphomandra and species betacea. The Cyphomandra genus is made up of about 30 species. Shaw (1996) has reported that Cyphomandra genus consists of 35 species confined to the New World tropics. They were earlier described under the genus Solanum. They can be separated from Solanum  by several characters, the most important being anther characters. In Cyphomandra in the anther the connective is thickened and expanded dorsally. As a result, it is clearly differentiated from the anther thecae, which is thin walled and papillose.

Economically important plant in this genus is Cyphomandra betacea. Other important related species are Cyphomandra casana (Casana), C. craccifolia (Mountain tomato) and C. fragrans (Guava tamarillo). It has got distant affinity with Lycopersicon esculentum (Tomato), Physalis ixocarpa (Tomatillo), P. peruviana (Cape gooseberry), Solanum muricatum (Pepino Dulce) and S. sessiliflorum (Cocona).

Tree-borne vegetables spring out from woody perennial plants. There are too many trees in nature across the globe which offer edible fruits, a few of them are exploited for vegetable purpose. Of course, in popular parlance, vegetable gives the connotation of the product of herbaceous crop, but there are vegetables which are the product of woody perennials. In the present agri-horti-scenario, where diversity in product range is the most sought after aspect, attempts are underway to popularize culture of such vegetables which have not yet found commercial momentum at the grower’s field. Tree-borne vegetables are one such group which needs proper popularization to really help to percolate their farming. These vegetables being vested with woody nature, tap root system, bark covering and stress tolerance mechanism are worth exploitation under diverse farming systems prevalent across the country. Further many tree-borne vegetables are rich in nutrients also and as such add to their plus identity.

Bonsai first appeared in China over a thousand years ago on a very basic scale, known as pun-sai, where it was the practice of growing single specimen trees in pots. These early specimens displayed sparse foliage and rugged gnarled trunks which often looked like animals, dragons and birds.

With Japan’s adoption of many cultural trademarks of China, bonsai was also introduced to Japan during the Kamakura period (1185-1333) by means of Zen Buddhism, which at that time was rapidly spreading around Asia. Once bonsai was introduced into Japan, the art was refined to an extent not yet approached in China. Over time, bonsai, which was confined to the Buddhist monks and their monasteries, were introduced as a symbol of prestige and honour. It became an important part of Japanese life by being displayed on specially designed shelves.  For the Japanese, bonsai represents a fusion of strong ancient beliefs with the Eastern philosophies of the harmony between man, the soul and nature.

Renewable energy sources, are the sources of power that quickly replenish and which can be used again and again. For this reason they are sometimes called energy resources. The main sources of renewable energy and their advantages and disadvantages are :

Solar
Energy from sunlight is captured in solar panels and converted into electricity.  Potentially it is an infinite source of energy supply, but the solar panels are costly.

Vedic literature indicates that the energy in the universe gets transmitted into the human body through star galaxies. The star galaxies of our universe are divided into 27 parts each signified by a particular star (nakshatra). Every human being is assigned to a particular star by virtue of his birth time.  Each star is associated with a tree. The tree associated with his star gives the universal energy to the human being. Thus astrology gives us a chance to identify the tree which is auspicious to us, being associated with our birth star. When one plants the tree associated with his birth star near his dwelling, it will bring good luck and prosperity to him.

The early inhabitants of our country were very conscious of the placement of their dwellings in beautiful surroundings. The best examples are from the West Coast, where the houses were traditionally constructed in the midst of gardens. The Arab traveller and historian, Ibn Batuta, in his itinerary in coastal Malabar recorded their picturesque beauty, as early as in the 10th century AD. The whole compound was planted with trees, which were useful and aesthetic in appeal. The scholarly elite used trees and shrubs mentioned in Kalidasa’s work in their planting schemes. Through the tree and foliage, a path is formed to the main village.

I. General information

1. Common names of trees

• Acacia nilotica – Black babool, Indian gum-Arabic tree
• Acacia auriculiformis – Golden shower
• Adansonia digitata – Baobab, Monkey bread
• Adenanthera pavonina – Red sandal wood, bead tree, red wood
• Ailanthus excelsa – tree of heaven, paradise tree
• Albizia julibrissin – Pink siris, silk tree

Trees

A trees is a woody perennial plant with clear stem or trunk. Trees trend to be long leaved living up to several 100 year.

TREE- logical meaning of each letter

T - Temperature and micro-climate moderation.

R - Removal of air pollutant.

E- Erosion control.

E - Energy conservation.

Definition: A tree is a perennial plant with an elongated stem or trunk, supporting branches and leaves in most species.

Trees are not a taxonomic group but include a variety of plant species that have independently evolved a woody trunk and branches as a way to tower above other plants to compete for sunlight. Trees tend to be long lived, living up to several hundred years.

Trees are amazing nature’s creations that are not only important for mankind but also sustain ecological balance in nature. They are the source of livelihood and provide valuable raw material for manufacture of household utility products. They are important from spiritual aspect and have been exhaustively described in ancient Indian texts with their significant Ayurvedic and other potential health benefits. Botanically a “tree.” is a large, long-lived (perennial) woody plant that attains a height of at least 6 m (20 ft) at maturity. A tree possess certain characteristic features such as a trunk (single main self-supporting stem) which gives off spreading branches, twigs and foliage to make a crown. Since the diameter at breast height (dbh) of trees is determined internationally at 1.35 m (4.5 ft) above the ground, a tree must be un-branched at least up to 1.5 m (5 ft) from the ground.

Urbanization coupled with industrial development creates problems of environment like air pollution, water pollution, noise pollution and civic ugliness. Of late, there is a greater awareness of environmental issues and increasing understanding of several attributes of vegetation. This led to an intensification of activity in the field of landscape horticulture to combat pollution and create an aesthetic environment for recreation and healthy living. Planning and execution of landscape projects for different urban locations should be done to meet both aesthetic and ecological requirements.

Introduction

Trichoderma, a genus of fungi found ubiquitously in soil, has garnered significant attention as a potent bio-control agent for managing soil-borne diseases in flowers. These diseases, caused by pathogenic fungi like Fusarium, Pythium and Rhizoctonia, can devastate floral crops, leading to substantial economic losses. Trichoderma species combat these pathogens through multiple mechanisms, including mycoparasitism, competition for nutrients and space, production of antimicrobial compounds and enhancement of plant immunity. By colonizing root surfaces, Trichoderma forms a protective barrier against harmful pathogens, effectively reducing their impact. Additionally, Trichoderma’s ability to decompose organic matter and improve soil structure further contributes to plant health and vigor. Its use aligns with sustainable agricultural practices, offering an eco-friendly alternative to chemical pesticides, which can have detrimental environmental effects and lead to resistance in pathogens. The application of Trichoderma not only promotes healthier, more resilient flower crops but also supports the broader goal of reducing reliance on synthetic agrochemicals. As research continues to unveil the full potential of Trichoderma, its role in integrated disease management strategies is poised to expand, making it an invaluable tool for floriculture and sustainable agriculture worldwide.

1. Introduction

Agriculture is prime source of living for rural people world wide effective in raising incomes among the poorest compared to other sectors. In Indian economy horticulture has been recognized as one of the most potential agriculture endeavours in terms of exponential growth. The Horticultural crops viz., fruits counting nuts, vegetables with potato, ornamental plants plus cut flowers, spices, plantation crops and medicinal and fragrant plants has developed a prime promoter for monetary growth in numerous of the states in the nation and it pays 30.4% to GDP of agriculture (ICAR website).

Major cucurbits grown in India are cucumber, watermelon, muskmelon, ash gourd, pumpkin and squashes, snake gourd, ridge gourd, smooth gourd, bottle gourd, round gourd, bitter gourd, pointed gourd, ivy gourd,pointed gourd and oriental pickling melon. After independence,a lot of breeding work were done in these crops at many research institutes in the country which  resulted in  release of several high yielding/disease resistant varieties/hybrids.

Being warm season crops, cucurbits are tropical in origin, mostly in Africa, Tropical America and Asia. Flowering in cucurbits normally start in 40 to 45 days after sowing depending on weather conditions. Sequence of flowering follows a set pattern, namely the first 4 to 6 flowering nodes would bear staminate flowers and later pistillate flowers appear. Many sex forms are seen in cucurbits viz., monoecious, dioecious, gynoecious,trimonoecious, gynomonoecious and andromonoecious. Sex modification is also possible in cucurbits by exogenous application of plant growth regulators. GA₃ and AgNO₃ are used for inducing male flowers in gynoecious lines. Conversely,ethrel and TIBA  are used to promote greater number of female flowers. This kind of sex modification is more useful and practicable in  cucumber and bottle gourd where continuous and simultaneous flowering, fruit set and fruit picking take place.

Tropical plum (Spondias mombin) also known as yellow mombin, hog plum, and java plum, is a deciduous fruit species widely spread in the tropics. This species is evaluated for its fruit as an unconventional source of vitamins A and C, which are used for making juices, ice creams and jellies. This plant also has medical importance.
 
It is a graceful tree of the family Anacardiaceae, a native of tropical America. It was introduced into India for edible fruit and also to serve as fencing. The fruit flesh (48% on  weight of fruit) contains: total solids 11.47%, protein 1.38%, fat 0.57%, acids (astartaric) 1.50%, reducing sugars 9.41%, sucrose nil, fibre 1.17%, and mineral matter 0.66%. The seeds are eaten when tender. The fruit is a good source of minerals and vitamin B1 and C.

Root and Tuber crops are the most important food crops of man after cereals. Tuber crops are efficient producers of carbohydrates especially under suboptimal conditions of rainfall, fertility and low input conditions encountered in tropics. The group contributes about 6 % of the world’s dietary calories. In fact, one out of 6 kg of human food comes from roots and tubers. Tuber crops find an important place in the dietary habits of small and marginal farmers especially contributing to food security of tribal populations. Tuber crops grown in India include Cassava, Sweet potato, Dioscorea, Colocasia, Amorphophallus and minor tuber crops like Chinese potato, Arrowroot, Canna, Yam bean etc. The biotechnology can contribute to the solution of the major problems and realize greater benefits for tuber crops.

Tuberose (Polianthes tuberosa) commonly called as Rajanigandha produces waxy, white and fragrant flowers on long spikes which are mostly used as cut flowers for making garlands and extracting essential oil. Among the ornamental bulbous plants, it has great economic potential for cut flower trade and essential oil industry. The predominant characteristics of this crop are its lingering, delightful fragrance and excellent keeping quality.

Tuberose (Polianthes tuberosa L.) belonging to family Amaryllidaceae is half hardy, perennial, bulbous plant. Bulbs are made of scales and leaf bases and stem remains concealed within scales. The generic name Polianthes is derived from Greek word “polios” meaning shining or white and “anthos” meaning flower, in allusion to the blooms of the common tuberose and species tuberosa, the plant being tuberous in nature. Tuberose is commercially cultivated in tropical and sub tropical areas for cut and loose flower trade and also for the extraction of it’s highly valued natural flower oil.

ORIGIN AND DISTRIBUTION

Tuberose is a native of Mexico (Bailey, 1976) from where it spread to different parts of world during 16^th century. The name tuberose is derived from tuberosa, this plant being the tuberous hyacinth as distinguished from the bulbous hyacinth. The name therefore, is tuber-ose, not tuberose. By the middle of the 18^th century the tuberose was still referred for as Hyacinthus indicus tuberosus. Originally Linnaeus had used the name Polianthes floribus alternis in his Hortus Cliffortianus. Later it was grouped under the genus Polianthes and the species tuberosa.

Tuberose is cultivated on large scale in China, Egypt, France, Italy, Israel, South Africa, New Zealand, Spain, Sri Lanka, North Carolina, USA and in many tropical and subtropical countries.

In India tuberose is commonly known as Gulchari and Gulshabbo in Hindi, Rajanigandha in Bengali, Sukandaraji and Nelasampengi in Telegu, Nilasampangi in Tamil and as Sugandharaja in Kannada.

In India its commercial cultivations is confined to Bagnen, Midnapur, Krishnanagar, Ranaghat, Kolaghat and Pariskura in West Bengal, Guwahati and Jorhat in Assam, Pune, Thane, Sangli, Nasik and Ahmednagar in Maharastra, Udaipur, Ajmer and Jaipur in Rajasthan, Navsari and Valsad in Gujrat, Ambala, Gurgaon and Faridabad in Haryana, Ludhiana and Patiala in Punjab, Devanahalli, Tumkur, Kolar, Belgaum and Mysore in Karnataka, East Godavari, Guntur, Chitoor and Krishna district in Andhra Pradesh and Coimbatore and Madurai in Tamil Nadu. Growers of Uttar Pradesh, Delhi and Orissa are also concentrating in tuberose cultivation after evolvement of improved varieties namely Shringar, Suvasini, Prajwal and Vaibhav by Indian breeders (Singh, 2006).

INTRODUCTION

Among the important ornamental bulbous plants, tuberose occupies a very prominent position. In the orient, where ‘white’ goes for virtue and purity, tuberose flower is much adored for its prettiness, elegance and fragrance. It is commercially grown as cut flower, loose flower as well as for its potential in perfume industry.

The flowers of tuberose are used for artistic garlands, floral ornamentals, bouquets and buttonholes. The long flower spikes are excellent as cut flowers for table decoration when arranged in bowls and vases. They remain fresh pretty long time and stand long distance transportation and fill a useful place in the flower market.

Plants of tuberose can be used in landscapes; in all-white gardens or with other plants. Variegated varieties with golden or yellow striped leaves are very attractive and these varieties are suitable for garden beautification. Potted plants can be put in decorative containers and used for entranceways and interiors.

Abstract: Tuberose, native of Mexico, occupies prominent position due to long spikes of fragrant flowers, potential in perfume industry and nearly year round growth in tropical and sub-tropical climate. Flowers are used for artistic garlands, floral ornamentals, bouquets and cut flowers for table decoration. Flowers remain fresh pretty long time and stand long distance transportation. Lack of genetic diversity in flower type, size, colour, self incompatibility, sterility, low seed set and limited information on genetics of characters pose significant challenges to breeders. Breeding objectives with high priority include dwarf plant type, novel colours, attractive forms for pot culture/ bedding purpose intense fragrance and high essential oil content. Only two white flowered cvs. Single and Double types are cultivated for commercial production. Salient breeding achievements through planned hybridization and mutation breeding are discussed.

Keywords: Polianthes, cultivars, interspecific/ intervarietal hybridization, transgressive segregants, gamma rays.

Introduction

Among ornamental bulbous plants, tuberose occupies a very prominent position. Tuberose flower is much adored for its prettiness, elegance and fragrance. It is commercially grown as cut flower, loose flower as well as for its potential in perfume industry.

The flowers of tuberose are used for artistic garlands, floral ornamentals, bouquets and buttonholes. The long flower spikes are excellent as cut flowers for table decoration when arranged in vases.

Plants of tuberose can be used in landscapes, in all-white gardens or with other plants. Variegated varieties with golden or yellow striped leaves are very attractive and these varieties are suitable for garden beautification. Potted plants can be put in decorative containers and used for entranceways and interiors.

Tuberose is an important half-hardy, perennial bulbous flowering plant. It belongs to the Amaryllidaceae family and having basic chromosome number (n=30). It is one of the important cut flower among the top ten cut flowers due to its beauty, elegance and sweet pleasant fragrance (Sadhu and Bose, 1973). It is cultivated for its long lasting spike as cut flower as well as loose flower purpose. Tuberose also known as Rajanigandha in Bengali, Gulchari and Galshabbo in Hindi, Sukandaraji and Nelasanpengi in Telegu, Nilasompangi in Tamil and Sugandharaja in Kannada. It is suitable under protected cultivation as well as open field condition (Brundell and Steenstra 1985). It has a huge economic potential and more demand for cut-flower purpose (Usman, 2013) and essential oil industry (Singh, 1995). Due to its immense export potential, cultivation of tuberose is gaining momentum day by day in our country.

Origin and distribution

Tuberose is cultivated all over the world and it is originated from Mexico. Tuberose is commercially producing in various countries such as India, China, Bangladesh, Mexico, Kenya, Italy, France, Morocco, USA, Hawaii and South Africa. In India, it is commercial growing in West Bengal, Karnataka, Tamil Nadu, Maharashtra, Uttar Pradesh and North Eastern part of India. At present scenery tuberose is cultivation in India 7. 95 lakh hectare and cut flowers is estimated to be 27.71 ‘000 MT and loose flowers1560.70 lakh (Anonymous, 2013).

Tuberose is a highly fragrant perennial bulbous flower crop with major importance in Indian loose flower production, perfumery and floral decoration. Single-flowered types are particularly important for loose flower production, while other forms are used for ornamental and cut flower purposes. The chapter discusses its origin, distribution, genetics, botanical characteristics and commercially important varieties. It explains climate and soil requirements, bulb and bulblet propagation, land preparation, planting, nutrient management, irrigation and cultural operations. Important pests and diseases and their management are presented systematically. The chapter also covers flowering, harvesting, postharvest handling, storage and yield, providing a complete production package for commercial tuberose cultivation and value-added fragrance industries.

Tulip cut flower is first among the bulbous ornamentals due to its attractive colours and exquisite flowers. Tulip is a member of Liliaceae family, commonly grown from bulbs. The name tulip is derived from the Persian word “toliban” meaning “turban”, which is an appropriate term to describe the flower shape of certain tulips. The mother bulb dies and is replaced by several daughter bulbs, each of which is an annual unit of growth borne in the axils of the mother bulb scale. Tulips are basically grown for three purposes i.e. bulb production, forcing as cut flower and potted plant and for landscaping (Singh, 2006). The world tulip flower industry is dominated by the Netherlands. Another important tulip producing country is France.

ORIGIN AND DISTRIBUTION

The primary gene centre of the genus Tulipa is located in the Pamir Alai and Tien Shan mountain ranges of central Asia. Diversification in this region, resulting in a distribution from Morocco to Western Europe and eastward to Western China. A second gene centre has been found in the Caucasus (Hoog, 1973). However, Bailey (1963) reported that the tulip is native of Siberia, Turkey, Asia Minor, China, Japan and Mediterranean countries of Europe, the species are particularly abundant in central Asia, in the Bokhara region.

Tulips were first seen in Turkey. The vast majority of species occurs in central and western Asia in the countries such as Turkey, Afghanistan, Iran, Kazakhistan, Turkmenistan, Uzbekistan and Georgia. East of this center of distribution, the range of a couple species extends into northern India and far western China but on limited basis. One species of tulip i.e. Tulipa stellata is found wild in the mid and high hills of Himachal Pradesh and T. aitchisonii is native of Himalaya. There are around a hundred species of Tulipa originated from Turkey to the Pamir and Hindu Kush mountains in Asia, which have been used for breeding purposes. In fact, a small number of species can be found in the wild in Europe and those are all restricted to southern parts, primarily in the Mediterranean region as far west as Portugal. There is not a single species of tulip native to Holland, the country frequently associated with these colourful and well known flowers.

Records show that tulips were in cultivation in Turkey as early as 1000 A.D. In 1578, first tulip appeared in England. Carolus Clusius planted the first tulip in 1593 in the botanical garden in Leiden (The Netherlands). The tulips appear in France in 1598. During 1600-1650 tulip become an exclusive garden plant and it was planted in strategic places in various gardens. Commercial cultivation of tulip started during 1600 in South Haarlem. The famous first parrot tulip was described in 1630. The famous tulip firm namely Voorhelm was established in 1650 in the Haarlem. An inventory of 126 different tulips was released in 1661. The bulbs of tulip had been sold to the U.S. from Holland as early as the eighteenth century. During nineteenth century, several hybrids were developed and cultivable area expanded largely. A fragrant variety Prins van Ooslenrijk and a double early tulip Murillo were developed in 1860. The worldwide popular Darwin tulip group was introduced in 1889. The first classified list of the tulip name including cultivation practices and flower management was released during 1914-1915. The most of the modern tulip complex is based on T. gesneriana with some important hybrids with species tulip. There are approximately 100 of these wild or species of tulips that occur naturally in the world and several thousands of distinctly different hybrids, selection and mutants that are gracing gardens and becoming remunerative to the growers around the world. In India its cultivation is limited to amateur gardeners of hilly areas in Kashmir and Himachal Pradesh. Srinagar, Kangra, Kullu, Mandi, Solan, Shimla, etc. are most suitable areas. Tulip cultivation can be extended in new areas like hills of Uttarakhand in India.

INTRODUCTION

Tulips are one of the most popular and widely grown flowering plant. Tulip is a main stay of spring gardens providing abundant flowers in vivid and vibrant spectrum and colours. It is first among bulbous ornamentals due to its attractive colours and exquisite flowers. Tulip is the national flower of Turkey and tulip motifs feature prominently in Turkish folk arts. The first European cultivation of the tulips as a garden flower occurred in the Netherlands in sixteenth century. In the following century, the early enthusiasm for the new flowers triggered a speculative frenzy now known as tulipomania. The Netherlands and tulips are still associated with one other. Tulip festivals are held in the Netherlands and in North America every May. A number of bewitching cultivars grown to perfection in a large variety of delicate and brilliant shades have developed tulip cultivation into a great bulb growing industry. Tulips are not only widely cultivated for cut flower production world wide but also grown for pot culture, in beds, borders, formal and informal location. They are also suitable for growing in orchards, lawns, rockeries and wild gardens.

The word tulip industry is dominated by the Dutch tulip growers. There is 10,000 hectare of tulip bulbs grown in the Netherlands. About 70 per cent of tulip bulbs cultivated are for forcing for flowers with 30 per cent for pre packs for gardens. The world market for bulbs has been buoyant for the past ten years. Production has been increasing at the rate of 6-8 per cent per annum and the market has expanded in line with this growth. In the Netherlands, three quarters of the total bulbs produced are exported, with the highest percentage going to the United State followed by Germany. In India, tulips are gaining popularity among the flower growers owing to congenial climate in hilly areas. Particularly in Kashmir valley, production of cut flower is increasing. Some area has been increased in Himachal Pradesh. It can also be grown successfully in other hilly parts of the country like Uttaranchal between 1300 to 3000 metre above mean sea level.

Abstract: Tulip (Tulipa) is ornamental bulbous plant cultivated for cut flower, potted plant, garden plant and for landscaping. Species from different sections display complementary agronomic characteristics. The main goals of breeding are introgression of resistance against diseases, short forcing period, flower longevity, new flower colours and flower shapes. Long juvenile phase, slow rate of propagation, long breeding phase, slow rate of propagation, long breeding cycle, knowledge of mode of inheritance, reproductive and germination barriers pose significant challenges to breeders. The use of molecular cytogenetic tools, methods to overcome crossing barriers, polyploidization, biotechnological tools and marker assisted breeding are discussed.

Keywords: Geophyte, monocot, genomic analysis, interspecific hybridization, intergenomic recombination, gene transfer, forcing, tulipa.

Introduction
Basil/Tulsi is a popular name given to any aromatic herb that belongs to genus Ocimum and family Lamiaceae (Labiatae). The word ‘basil’ was derived from Greek word ‘Basilica’ which means the royal plant. It comprises over 160 species spread over the tropical, sub-tropical, and warmer part of temperate regions of both the hemisphere ranging from sea level to 2000 m height with their diversity met in West Africa. Tropical Africa has maximum diversity with 59 species, followed by sub-tropical region of South Africa with 19 species and India with 9 species only.
 

I. General information

1. Cool season turf grasses are Perennial rye grass, Creeping bent grass, Colonial bent grass, Kentucky blue grass, Canada blue grass, Poa spp, Festuca spp, Agrostis spp, Lolium spp
2. Warm season turf grasses (25-35^oC) are Cynodon sp, Zoysia sp, Stenotaphrum secundatum, Paspalum notatum, Eremochloa ophiuroides, Axonopus sp, Pennisetum clandestinum, Buchloe dactyloides
3. Broad leafed turf grasses are Arachis pintoi, Dichondra repens
4. Based on mowing height, turf grasses are classified into tall, medium & dwarf
5. Turf grasses which needs high mowing height of>3.5 cm are Tall fescue, sheep fescue, Canada blue grass, fine fescue, wheat grass, orchard grass
6. Turf grasses which requires medium mowing height of d” 3.5 to 1.0 cm are perennial rye grass, Kentucky blue grass, Buffalo grass, etc.,
7. Turf grasses which requires low mowing height of d” 1.0 cm are colonial bent grass, creeping bent grass, Annual blue grass
8. Turf grasses are classified based on their recuperative capacity into fast, medium & slow

Turf is an English word, which traces its origin to India from the Sanskrit word “Darbha” means “tuft of grass” or “Kusha” in hindi. Kusha has been mentioned numerous ties even in Hind mythologies (Turgeon, 1985). Turf, is a grass which is smooth, has quality texture and a soothing colour surface that is used in the golf courses, lawns, fields, nurseries, gardens, etc. Turf is a piece of earth of about 5 cm thickness with grass thickly grown over it. Turfgrass has become increasingly important in today’s society as people’s needs increase for recreation, comfort and aesthetics. Turfgrasses are considered as major component of landscape industry which provides aesthetic value. They provide arena for various functional, recreational and social activities.

Turfgrasses enhance the appearance of land and increase the utility of sports fields, lawns, parks, golf courses and other greenbelt areas in and around urban as well as sub urban centres. They improve the environment of urban centres by reducing erosion, temperatures, noise, dust and glare. And, turfgrasses improve the safety of sports fields and playgrounds by adding resiliency to the playing surface. Turfgrasses are increasingly being used by National Highway Authority of India for reducing dust pollution and decreasing vehicle glare by planting on central verge and sides. Only turfgrasses are used by airport authorities for planting besides runway. The grasses being of perennial nature also help in carbon sequestration thus helping combat climate change. The grasses which grow well on sandy soil will help to reduce the dust and control erosion and dust pollution on river banks.

The turfgrass industry is growing rapidly due to strong demand for residential and commercial property development, rising affluence, and the environmental and aesthetic benefits of turfgrass in the urban landscape. Increased area under aesthetic and utility turfs is mainly because of increasing awareness about the sports, degrading environment and the increase in real estate value. The economic value of the turfgrass industry in India is yet to be determined as there is no single government agency handling or collecting the authentic data on turfgrass cover, use or import. All the agencies dealing with turfgrasses are either private companies, nurseries or corporates. But, according to the scarce data gathered by golf associations, sports experts and Association of Indian Nurserymen, turfgrass industry covers an area of more than 30000 acres, in which around 6000 acre is under turfgrass cultivation (sod production). States leading in turfgrass cultivation and marketing are Karnataka, Andhra Pradesh, Telangana, Uttar Pradesh, Haryana, Maharashtra, etc. The total number of international cricket grounds in India are 50 and 8 are under construction, more than 520 domestic cricket grounds and athletic fields are also in operation. Indian turfgrass industry is growing around 10 per cent annually. Landscape business contributes 2-3 per cent of total construction and turf has 50 per cent of landscape business.

1. Introduction

A lawn is an indispensable feature of a landscape with a sizeable proportion of space relative to other garden features. It is regarded as the heart of a garden that enhances the beauty of a landscape providing both functional and aesthetic utility. A well maintained lawn at a residential, public or institutional places can be used both for active and passive recreation. It enhance the beauty of surroundings and contribute to real estate value. The turf industry is being viewed as an integrated sector of ornamental horticulture in the developed countries like USA, Australia, China, Netherland, UK, Japan and Denmark. Globally, the turf grass industry has employed skilled workforce for maintaining more than 700,000 athletic fields and over 17,000 golf courses, with an annual worth of $ 20 million each year (Aldous and Chivers, 2002).

Garden

Garden is a place where vegetables, fruits and ornamental plants are grown mainly for recreation. The garden incorporates both natural and man-made materials.

Types of garden

The major garden types which shall be discussed are: English garden, Mughal garden, Persian garden, Italian garden, French garden, Japanese garden etc. Out of these the Mughal, Persian, Italian and French styles fall in the category of formal gardens, whereas the English and Japanese gardens are classified in the informal style of gardening.

1. Mughal garden

Mughal gardens are synonymous to formal style of gardening.

Broadly these gardens are categorized as Pleasure gardens and Tomb gardens.

Pleasure gardens are meant for kings and queens.

Tomb gardens are attached to tombs of kings and queens for giving peace to soul.

Gardens are symmetrically designed in rectangular or square plots.

The garden area is divided into four plots by water channels.

The four plots are planted with trees, shrubs, etc.

The four channels represent four rivers of life.

The running water provides coolness and freshness to the garden.

Reflection of sky and trees provide unique beauty to the eye.

The axis is straight and central and sometimes represented by tree line.

The water pool created in the centre with over flowing water serves as central specimen.

Fountains, cascades are linked to central pool to create scenic beauty

2.1 Introduction

Generally, gardens are divided into different sections as per the rules and regulation followed in the placement of different elements and features in it. On the basis of this garden types are divided into 4 categories such as

This chapter introduces protected structures as controlled environments designed to modify the microclimate for optimum crop growth. It explains different greenhouse and polyhouse types based on structure, covering material, ventilation and environmental control. Glasshouses, polyhouses, low tunnels and other structures are discussed along with their construction characteristics, advantages and applications. The chapter provides a foundation for selecting appropriate protected structures according to crop requirements, climate, production objectives and available resources.

While setting up a garden or landscaping an area, the natural floristic wealth is ignored very often. But many of those flora are much adapted to prevailing soil and climatic conditions of the area. Plants with attractive flowers or foliage could be retained to maintain the natural appearance as well as to reduce cost of landscaping.Very familiar plants of our surroundings having good ornamental value are discussed in this chapter.

Goanese Ipecacuanha 
Naregamia alata commonly known as Goanese Ipecacuanha is a member of family Meliaceae. It is known as Tinparni in Hindi, Triparnika in Sanskrit, Nilanarakam in Malayalam, Nilanreagam in Tamil and Nelanaringa in Kannada. Common name was derived from its use of roots in treatment of malaria. Vernacular name, Nilanarakam originated from its morphological resemblance to members of Rutaceae. 

The seed spices are aromatic vegetable products mostly used in whole or ground form for imparting flavour, aroma and pungency to food. The seed spices possess industrial importance and are used in cosmetics, perfumery and pharmaceutical preparations.  The major seed spices , coriander, cumin, fennel and fenugreek are cultivated in larger areas in arid to semi-arid regions covering major parts of Rajasthan and Gujarat. Besides these four crops, a minor group of under exploited seed spices crops has tremendous scope for their cultivation in arid to semi-arid parts of the country. Such under exploited seed spice crops are ajowan, dill, celery, anise, caraway, black caraway, parsley and nigella.

India produces currently 8.4 lakh t. of seed spices from an area of  5.7 lakh ha. Owing to large domestic demand and stringent export regulations only 10% of total production is exported and earns a foreign exchange of Rs. 225 crores annually. The global demand of seed spices is 1,50000 t. and India  exports only 60750 t. annually. It is suggested that if wide range of seed spice crops are grown across the country, present level of production and export can be doubled. Therefore in addition to major group of seed spices, the minor seed spices, so called under exploited crops should be given emphasis and promoted amongst farmers for earning more profit through  export.

The Andaman and Nicobar group of Islands, popularly known as the Bay islands, consists of 572 islands, islets and rocks, situated off the Eastern coast of India. The Islands are covered from coast to coast with an almost impenetrable growth of luxuriant tropical rain forests. The luxuriant growth of dense forests with tangled mass of climbers, lianes, canes and plant communities provide an additional source of income. Many species of bamboos, bushes, shrubs and stunted trees have tremendous values (Mondal, et al 2000). Most of the diversity is still collected from wild forest habitats largely composed of trees, shrubs and other perennial vegetations. Underutilized fruits provide food, nutrition and sustenance to the natives. Broadly, such underutilized diversity in edible fruits falls into four categories (Groot et al 1993).

Wild fruits were an important source of food for mankind before dawn of civilization and domestication of present day fruits. Cavemen in forests also depended on these fruits and passed on valuable information on utility and choice of wild species of fruits from generation to generation.Thus the present day horticulture came into existence. Also, wild varieties of plants, yielding edible fruits growing throughout the Himalayas, contributed directly to cultural heritage of India. Even today, these fruits are eaten in plenty by local people, as they are commonly available in abundance in their habitats. Fruit crops, which are neither grown commercially on large scale nor traded widely are called underutilized fruit crops. These are cultivated, traded and consumed locally. Underutilized fruit crops have many advantages in terms of easiness to grow, hardy in nature and  production of good crop even under adverse conditions. Most of them are rich sources of vitamins, minerals and other nutrients. Underutilized fruit crops play crucial role in successful running of processing industry round the year in the region. A large proportion of rural population depends on locally available fruits to meet their dietary requirements

In ancient days spices and herbs were valued as basic ingredients of incense, embalming preservatives, ointments, perfumes, antidotes against poisons, cosmetics and medicines and were used less in culinary preparations. A notable use of spices and herbs in ancient and medieval times were for the treatment of a variety of illnesses. Subsequently spices and herbs had come to be used to flavour food and beverages. In the course of time spices and herbs were shown to be useful not only for making the food lasting and palatable, but also in retarding or preventing rancidity and spoilage. This knowledge acted as a catalyst for the use of spices in a variety of processed foods. Based on the uses, herbs and spices are classified in to culinary, cosmetic and pharmaceutical. In the modern world spices have wide affiliation in the culinary art of people around the world, and are used in food industry for flavouring and seasoning, as well as in pharmaceutical preparations in the traditional systems of medicine and in beauty care. Spices and herbs are useful because of the chemical constituents contained in the form of essential oil, oleoresin, oleogum and resins, which impart flavour, pungency and colour to prepared dishes.

The extensive use of improved types of vegetable crops has led to a  situation that the indigenous types are virtually disappearing from ecosystems creating a vacuum in crop biodiversity. Biodiversity of genes, species, ecosystems and habitats will remain under threat. Habitats will be decreased and fragmented, endangering many indigenous, rare, endemic and specialist species populations and ecosystem functions, although generalist and invasive species will continue to spread. Therefore, loss of biodiversity can be considered at three scales: genes, species or populations and habitats or ecosystems. Maintaining thriving natural systems is essential not only for economic or ethical reasons, but also for ecological, social, recreational, educational and aesthetic reasons (Gomez, 1996). Most of these are easy to grow, resistant to pests and diseases, hardy and acceptable to local taste. They are rich in carbohydrate, proteins, fats, vitamins and minerals; hence the diets could be diversified to meet the nutritional requirements of the people in the country. The lack of micronutrients, including certain vitamins, minerals and other components needed for a healthy diet, is a pervasive and growing threat throughout the world.

Use of medicinal plants is as old as human civilization. India has a glorious tradition of health care system based on plants, which dates back to vedic era. Rig Veda , the oldest known repository of human knowledge and wisdom (4500-2500 B.C.) mentions about several medicinal plants used by the Aryans while in Atharva veda (2500-2000 B.C.) elaborates description of medicinal plants is given. Later, in Samhita period, the science of medicine systematically organized with clear concept and theories based on the treatises like Charak Samhita – 2000 B.C. and Sushruta Samhita – 1000-800 B.C (Maiti, 2008). Traditionally medicinal plant communities depended on plants to meet their basic needs over centuries. The pharmaceutical industry views plant wealth as a source of income. The modern medicine world perceives plants as a panacea for many ills. Despite this, there is no consolidated strategy to conserve medicinal plants for their use (Purohit and Vyas, 2005).

Among the temperate fruits, nuts have occupied an important position and can be grown in cold arid conditions on marginal lands of Indian hills without much care. In many countries, nut fruits are cultivated in marginal lands, hill slopes under rain fed conditions following the non intensive cultural practices by using cultivars selected to different environments using low quality ecotypes with poor yield. Although; these crops showed much potential to produce more yield provided cultivation in suitable environment condition along with high tech orchard management practices. The major nut fruits grown in world are almond, walnut, pecan, pistachio, hazelnut or filbert, chestnut and macadamia nut. In India, the full potential of almond and walnut has been exploited to great extent. The potential of other nuts are yet to be utilized and need special attention.

In India, nut fruits have not been given due importance in hills compared to pome and stone fruits although much potential exists. Amongst the nut fruits, the potentials of almond and walnut have been exploited to some extent but others are still in the underutilized condition. The main almond and walnut growing states of India are Jammu & Kashmir, Himachal Pradesh, Uttarakhand and North-Eastern states.

India is one of the 17 mega biodiversity hot spot of the world contributing to the worlds largest plant resource,from the long stretches of the Eastern Ghats on the east, the greater Himalayan range on the northern planes and Western Ghats on the west. The Eastern Ghats range is unique on its own way to host many valuable flora from time immemorial. The Eastern Ghats are spread over four states from the north east to south east. Among the four states Orissa is one of them consisting of diversified floral resource.

Orchids, more than any other plants, exert a mysterious fascination for most people. All the wild Orchids of tropical regions are highly puzzling and peculiar. These largest spectacular plants of monocot belongs to family Orchidaceae  consisting of more than 17,000 known wild species including 750 genera in the world and the present figure of hybrids among these touches around 80,000 (Rao, T.A., 1998). This family is cosmopolitan in nature having more species in tropics than the temperate regions. This family of monocotyledonous plants has evolved from prototypes of the lily and amaryllis family and is note worthy for the wide variety of its highly specialized and curiously modified forms.

Palms are monocot species, belonging to the family Palmae (Arecaceae). They are perennial and distinguished by having woody stems. Coconut, Arecanut and Oil palm are the major crops coming under this group. Palmyra is a naturally occurring palm in many parts of Tamil Nadu, Andhra Pradesh, Karnataka, Kerala, Orissa, Bihar and West Bengal States. Palmyrah is utilized by the locals for tapping inflorescence sap and for fruit. Palms of India are represented by 20 genera and about 96 species among which 24 species belonging to nine genera are endemic to India. The largest genus, Calamus with 44 species is followed by Phoenix seven, Pinanga five and the rest with less than five species each. The genera Borassus, Salaca, Livistona, Nypa, Hyphaene and Ptychoraphis are represented by a single species each. In addition, C. nucifera and A. catechu are extensively cultivated as plantation crops. They have almost naturalized in parts of Kerala and Andaman Nicobar Islands. Except P. sylvestris, C. urens and B. flabellifer which are widespread in peninsular India, the rest are of restricted distribution in specialized eco-geographical regions of the country. The forests of Andaman–Nicobar islands (13 genera, 24 species), northeastern and eastern Himalayan region (12 genera, 36 species) and the Western Ghats (7 genera, 30 species) are major centres of palm concentration. Nypa fruticans and Phoenix paludosa are fringe mangrove species occurring in salt marshes of Sundar-bans and Andaman–Nicobar islands. P. paludosa is also found in Orissa.

Energy remains the mainstay of civilized world. The priorities may lay in cost economics, environment friendliness, import substitution, or self-sufficiency as strategic objectives.  By the year 2050, worldwide energy demand is projected to be at least twice today’s level. Energy and environment are sectors that are of concern for policy makers and scientists.  Indian scenario is unique and different from other developed or developing countries. It has vast areas that lay waste and are not being utilized for cultivation since these are unfertile, dry, sodic, saline, or alkaline. Majority of its population lives in villages.
 
Energy supply must be sustainable and diverse and energy needs to be used more efficiently. Sustainable energy supply, both in the short- and the long-term, is needed for promoting both economic development and people’s quality of life, as well as protecting the environment. We also need a greater diversification of energy resources to ensure against risk of price rises and supply disruptions.

Introduction

Tripura is situated between 22^º56 ‘to 24^º32’ N latitude and 91^º10’ to 92^º21’ E latitude with tropic of cancer passing through it. The total geographical area of state is about 10,491 Sq.Km of which 58.90 percent area is under forest cover. More than 75 percent of the population either directly or indirectly depends on agriculture. The small and marginal farmers contribute about 90 per cent of total farming community and the average size of land holding is 0.97 ha (1990-91) in comparison to 1.25 ha (1976-77), which is the lowest among the seven other North Eastern states.
 
The state weather is characterized by warm and humid subtropical climate with three distinct seasons viz., summer, monsoon and winter with three different cropping seasons like khariff, rabi, summer and jhum cultivation in forest during pre monsoon and late monsoon periods. This state has many rivers out of which the important ones are Juri, Deo, Manu, Dalai, Thowai, Haora, Mahari, Burigang and Gomati which are mainly seasonal. Tripura receives an average rainfall of 2065 mm.The monsoon breaks in May – June and continues for about 4.5-5.0 months.