eChapters

Introduction 
A major challenge facing the world today is making the transition to a sustainable and resource-efficient economy, especially considering climate change, resource depletion, and rising waste production. The idea of a circular economy has drawn a lot of attention in this setting. In contrast to the conventional linear economic paradigm of “take-make-dispose,” the circular economy prioritizes closed-loop solutions that reduce waste and environmental impact by reusing, recycling, and regenerating resources. The efficient use of biomass as a plentiful and renewable resource to produce biofuels, biochemicals, and bio-based products is a crucial part of this circular framework. The combination of cellulose, hemicellulose, and lignin, known as lignocellulosic biomass, is one of the most widely available and sustainable types of feedstocks for biomass. Originating from forestry byproducts, specific energy crops, and agricultural residues like corn stover and wheat straw, lignocellulosic biomass is a feasible substitute for raw materials derived from fossil fuels [1]. By minimizing reliance on non-renewable resources and supporting sustainable waste management, its conversion through biorefineries into a wide range of bio-based goods is fully in line with the concepts of the circular economy [2]. Integrated systems known as lignocellulosic biorefineries maximize resource efficiency and reduce environmental impact by converting all the components of biomass into marketable products. The production of biofuels (such as bioethanol and biodiesel), platform chemicals, bioplastics, and energy by these biorefineries greatly aids in the creation of renewable energy and sustainable industrial processes [3]. Biorefineries can maximize the utilization of biomass feedstocks by converting them into high-value products while upholding zero-waste principles by utilizing a variety of biochemical and thermochemical conversion processes [4]. A summation of the function of lignocellulosic biorefineries in promoting the circular economy is given in this chapter. The first section covers the current developments in pretreatment and conversion methods as well as the composition of lignocellulosic biomass. By incorporating these technologies into biorefinery systems, waste valorization and energy efficiency issues can be resolved, and biobased goods can be produced more effectively. This chapter also examines the prospects and problems faced by lignocellulosic biorefineries, looking at their technological, economic, and regulatory elements as well as how they might help with the worldwide transition to a circular bioeconomy.

1. Introduction
Increasing population, industrialization, and change in the human lifestyle have become the reason for the exhaustion of non-renewable energy sources, our prime energy resource. The combustion of non-renewable energy sources produces toxic pollutants such as CO2, CO, NOx, SO2, etc., and greenhouse gases CH4, CO2, and N2O which significantly contribute to global warming, environmental pollution, and health hazards. In the current scenario, we need a green energy source that does not generate toxic gases and is eco-friendly. Hence, the research is triggered towards finding alternative solutions to overcome the energy crisis. The various green energy sources are solar, wind, tidal, geothermal, hydropower, biomass, hydrogen fuel cells, etc. The major drawback of these sources is the geographical location to install the plants. In the present context, identifying an alternate energy source that is sustainable, renewable, and eco-friendly to overcome the ever-growing energy demands is crucial. Hence, bioenergy is an eco-friendly, economical, and sustainable source of energy that gratifies the contemporary development environment by utilizing the potential of renewable organic energy resources (Yin and Wang et al., 2022).
2. Biomass
The sources of biomass are agro wastes, wood wastes, aquatic wastes, municipal wastes, wet wastes, industrial wastes, forest residues, etc. Figure 1.1 illustrates various sources of biomass, such as agricultural leftovers, forestry waste, energy crops, and organic municipal waste, showcasing their potential as renewable energy resources. Biomass is the product of photosynthesis and is also a versatile renewable energy source that can be utilized for sustainable biohydrogen generation. Biomass absorbs atmospheric CO2 during its growth, leading to relatively a lower net carbon impact as compared to fossil fuels. Renewable organic resources (biomass) can be in a solid, liquid, or gaseous phase. Energy generation through the incineration of biomass has been a longstanding practice. Since the energy potential of the biomass is not extracted effectively, it leads to environmental pollution (Kumar and Fiori et al., 2024). Biomass can be converted to liquid and gaseous fuels called biofuels with significant calorific value through thermochemical and biochemical processes (Gautam et al., 2020). Biofuels are superior to fossil fuels in the context of sustainability and reduced emissions of greenhouse gases. A variety of biofuels and chemicals such as bio-ethanol, biodiesel, acetic acid, formaldehyde, etc., can be manufactured from biomass (Gautam et al., 2020). Globally, research is advancing towards replacing non-renewable fuels with biofuels. However, the transition to biofuel technique presents a challenge due to the huge space requirement for biomass. Table 1.1 illustrates the categories of biomass employed for hydrogen generation, categorized into lignocellulosic materials, algal biomass, organic waste, and energy crops.

A family of about 15 genera and 705 species showing cosmopolitan distribution. About 35 genera and over 195 species have been reported from India. Some of the largely represented genera along with the number of their world over reported species are Smilax (350), Aloe (300), Asparagus (300), Dracaena (150). Ornithogalum (150), Haworthia (150), Tulipa (100), Fritillaria (85), Lilium (80), Colchicum (65), Sansevieria (60), Yucca (40), Asphodelus (12) and Ruscus (7).
Lilium is a bulbous ornamental plant commonly known as lily. The flowers are associated with religious feasts and symbolism. In the language of flowers, the lily is the symbol of purity, and innocence. It is one of the sixth major genera of flower bulbs produced worldwide. Lilium ranks 4th among cut flower trade in international market. Certain species of Lilium are edible, and valued for medicinal properties also.
Tulip is one of the most important bulbous geophytes in the world and popular due to its beauty and economic value. It is the top rated flower bulb in the international cut flower market. Modern tulip cultivars, predominantly T. gesneriana, are grown for bulb production, cut flowers, flowering potted plants, and landscaping. The current commercial assortment still consists mainly of cultivars from T. gesneriana. The second group of cultivars, the Darwin hybrids consists has been obtained from interspecific crosses between cultivars T. gesneriana and genotypes of T. fosteriana. Tulipa suaveolens, a kind of tulip discovered wild in southern Europe, has played an important role in the evolution of the garden tulip (Bailey, 1963).

Lilium is a popular genus of ornamental bulbous plants, belonging to family Liliaceae. Lilium is originated from a Greek word “li” meaning whiteness. It is an herbaceous perennial plant having scaly bulb. Despite the range of forms and their popularity as garden plants, there are two main groups of commercial importance as cut flowers i.e. Asiatic and Oriental Hybrids. They are the result of interspecific hybridization. However, intraspecific and interspecific hybridization face the hurdles like interspecific incompatibility, embryo abortion, degeneration of ovule, poor seed set and pollen sterility. There are several breeding methods and techniques which have been used to overcome these hurdles.

ORIGIN AND DISTRIBUTION

All species of Lilium are native to northern hemisphere. The northern limit extends up to Canada and Siberia, whereas in south, this extends up to Florida and the Nilgiri mountains of India. Majority of lilies known to cultivation are native to the northern hemisphere, chiefly South Canada, Siberia, Florida and India. It is distributed to east coast of Asia, the west coast of North America and the Mediterranean region. Several species i.e. Lilium nepalensis, L. wallichianum and L. polyphyllum are native of Himalayan region and L. niligiriensis have originated from Nilgiri hills. Few species have also been found in north east India. The Far East is the home of almost half of the world lilies and most garden lilies grown in the world have originated there.

The Assyrian monuments dating back to 1000 BC with sculptured lily forms is the first authentic record. The Palestinian coin makers were stamping lily on shekels before 143 BC. Lilium longiflorum popularly known as Easter lily became a florist flowerwhich existed in the Japanese gardens before trade opened the orient to the west. After that it was brought to the England by the Royal Horticultural Society in 1819. Lilies reached to Bermuda from England where it flourished well. Lily depicted an ancient Greek pottery, featured in literature and religions as diverse as pagan myths. Today lilies are enjoying a renaissance of recognition. In Italy and France they are among the most fashionable of flowers. In the USA their popularity has increased tremendously. A number of lily bulbs were imported by the US from the Netherlands for both professional forcing and garden usage. In India, lilies are mostly grown in the hills but Lilium longiflorum do well in the plains, especially under subtropical regions. There are about 7000 registered varieties of lily. The International Lily Register is maintained, under international agreement by the Royal Horticultural Society in London.

Lilium is a high-value bulbous cut flower known for large, attractive and fragrant flowers and extensive international demand. This chapter examines its taxonomy, origin, genetics, botanical description and major hybrid groups, including Asiatic and Oriental lilies. It explains bulb preparation, storage, planting, climate, soil, greenhouse management, nutrition, irrigation and crop regulation. Pest and disease management, harvesting, grading, postharvest treatment and yield are also presented. Special attention is given to commercial standards for Oriental and LA Hybrid lilies, including stem length, flower number, bunching and presentation. The chapter provides a comprehensive foundation for modern commercial lily production.

Lilium is a popular genus of ornamental bulbous plants, belonging to family Liliaceae. Lilium is originated from a Greek word “li” meaning whiteness. It is an herbaceous perennial plant having scaly bulb. Despite the range of forms and their popularity as garden plants, there are two main groups of commercial importance as cut flowers i.e. Asiatic and Oriental Hybrids. They are the result of interspecific hybridization. However, intraspecific and interspecific hybridization face the hurdles like interspecific incompatibility, embryo abortion, degeneration of ovule, poor seed set and pollen sterility. There are several breeding methods and techniques which have been used to overcome these hurdles.

Lily is one of the most beautiful and popular ornamental bulbous flowers. They belong to the genus Lilium of the family Liliaceae, which comprises of 110 species classified into seven taxonomic sections: Lilium, Pseudolirium, Martagon, Sinomartagon, Archelirion, Leucolirion and Oxypetalum. All species are distributed over the mountainous area in the Northern Hemisphere (10° to 60°), mainly in Asia, North America and Europe. Especially, China, Nepal, Korea and Japan are the major centres of lilium gene pool around the world. Being second amongst the bulbous flower crops in the commercial market, Lilium has 4^th position among cut flowers in Flora Holland (Flora Holland Annual Report 2017). In the language of flowers lily is known as symbol of purity and innocence. Majority of cultivated lilies are either hybrids or selections. A large number of species and hybrids can be used in ornamental gardens even though the lily requires little more attention than any other bulbs. Many species of lily (L. leichtlinii, L. lancifolium, Lilium candidum and L. auratum) are also edible and having medicinal value.

Importance and uses

Lilies are one of the most important bulbous ornamental plants with varies uses, grown in border, beds, pots, landscape gardens and are excellent cut flowers of magnificent appearance and beautiful flowers. Roman naturalist and writer, Plinius, recorded that salves and oils were prepared from leaves and flowers of the Madonna lily, or L. candidium. Some species are also known for medicinal and food values, which increased its economic importance many folds. The mucilaginous substance coming out from the bulbs while cooking is used as an ointment for tumours, ulcers and inflammations. The plant was really more of a miniature household pharmacy. Different compounds have been reported in this genus, such as carbohydrates, proteins, fats, amino acids, vitamins, alkaloids, phenolics, flavonoids, carotenoids, sterols, steroidal saponins, and steroidal glycoalkaloids. Alkaloids, steroidal saponins, flavonoids and polysaccharides have been isolated from L. lancifolium and L. brownii var. colchesteri bulbs. Flowers of Lilium candidium contain an alkaloid. Extract of Lilium polyphyllum bulb has been used as refrigerant, expectorant, aphrodisiac, diuretic, antipyretic and tonic (Warrier et al., 1997; Dhyani, 2007). In the customary system of medicine, this species reported to restore health immediately and works as antioxidant in the body. Lily oil is an aid in childbirth. The white lily was also renowned as a cosmetic.

This chapter introduces Lilium as an important bulbous ornamental crop and a major cut flower in the international market. It focuses on Asiatic, Oriental and other hybrid groups, including developments in pollen-free and stress-tolerant varieties. The chapter examines origin, distribution, genetics, botanical characteristics, varieties and protected cultivation requirements. Temperature, light, irrigation, nutrition, growth regulation, pest and disease management, harvesting and postharvest practices are also discussed for efficient commercial production.

Lilies, both Asiatic lilies and Oriental lilies, along with their hybrids are cultivated in very small scale in India, but are classified under high value crops (based on per stem value). Lilies are also capital intensive crops, in terms of high cost of infrastructure required for protected cultivation and bulbs which are imported. This article deals with growing conditions, varieties and other cultural aspects, as well as, practical tips from field conditions, from areas where Liliums are commercially grown in India.

Lilies are grouped under “high value flowers” in commercial floriculture parlance and are generally regarded under minor crops in production terms (on quantity produced or on area under production or on per sq.meter yield per year basis).  Lily is in fact a more productive and lucrative crop, specifically so in terms of income (on per sq. meter per year basis) than any other cut flower grown for commercial purposes in the open or protected cultivation in India.

Introduction

Lily is one of the most important ornamental bulbous flowers. It is commercially cultivated for cut flower production. The flower stems of lily are long and it has longer vase life. Lilies are very useful flowering plants which can be planted in any location as they do well in the bed or border with other perennial.

Asiatic and oriental lilies are leading cut flower group and in the international market it is dominated by the Netherlands. Oriental and Asiatic hybrid lilies are compact, with plant height of 60 to 150 cm that bears many flowers.

Abstract: Lilium is one of the six major genera of flower bulbs produced worldwide. Species are native to diverse habitat within Northern hemisphere. Liliums have a lengthy association with various world cultures. As a result, flower breeders have created numerous genotypes during the millennia of breeding this crop which has enabled its establishment in the top ten cuts, potted flowering and garden crops worldwide. The crop arises from multiple species. Research has focused on development of late flowering genotypes with forcing ability, improvement of flower form/ shape, pollenless cultivars, disease resistance and floral longevity. The limited genetic information and trait heritability have been established for this crop. Wide crosses are routinely used to create new genetic variability. Breeders have created complex hybrids such as LA, OT, OTO, FA, FAA, FO and OA hybrids through in vitro embryo rescue techniques. Molecular biology is being used to engineer Lilium against LSV and TBV. Crop ideotypes prescribe numerous traits for incorporation by flower breeders and geneticists including short forcing time, late flowering in Asiatic lilies, enhanced shelf life, genetically controlled height, rapid propagation and cultivars requiring no vernalization for flowering.

INTRODUCTION

Lily is one of the most important ornamental bulbous plants. It comprises one of the distinctive flowers in form, appearance and colour. The flower stems of lily are long and sturdy with luxuriant foliage and it has longer vase life. Lilies are very useful flowering plants which can be planted in any location as they do well in the bed or border with other perennial. Almost all varieties of lily are suitable for planting in combination with other plants and in front of tall shrubs. They look very charming in large clusters for mass effect. Shorter varieties are planted in containers. Lilies may be planted in the perennial border, preferably with the plants having ample foliage. They seem to have fascination for some companion and thus can be grown with other flowers in the garden. The bulbs of some varieties of lily are edible and somewhat bitter in taste but fairly pleasant when properly cooked. In China, bulbs of tiger lily are prefered as food due to its specific taste. Lilaline, an alkaloid is also found in the flower of some lilies. Lily has several medicinal properties. The bulb is diuretic, emmenagogue, emollient and expectorant. The flowers are carminative. They are used to strengthen the eye lid muscles and are commended in the treatment of myoptic astigmia.

Among the lilies, two groups have been evolved through extensive improvement and referred as coloured lilies and extensively grown for cut flowers and other popular type is generally grown for garden display in India. Asiatic and Oriental lilies are leading cut flower group and in the international market. It is dominated by the Netherlands. An oriental hybrid cultivar Tiara is developed. It is true pollen free lily, excellent for bouquets. Oriental and Asiatic hybrid lilies are compact, with plant height of 60 to 150 cm that bears many flowers. Spikes of 10 to 15 cm flower diameter that may point up, out or down. Blooms may be red, pink, orange, yellow, lavender or white in colour. They grow well in full sun or light shade, although flowers sometimes fade if exposed to hot sun. They can be grown with companion plants providing less competition. Popularity of Oriental lily is increasing over Asiatic lily.

Lima beans are flat green or light green beans. It is only utilised for the seed because the pods are coarse or woody. There are two kinds used in commercial canning: a climbing or pole variant and a dwarf or bush variation. Like other legumes used for seed, the lima bean (Phaseolus Iunatus) has a wide range in seed size, shape, and colour, as well as plant structure and primary applications. For freezing, canning, or fresh market usage, mature seeds are utilised like a vegetable. Lima’s have long been used as a grain legume when they are firm and dry. Peru is where they were discovered. The first domestication occurred in the Andes around 2000 BC, resulting in a large-seeded variety (Lima type), while the second occurred around 800 A.D. in Mesoamerica, resulting in a small-seeded variation (Sieva type).

Despite the meticulous methodology and extensive analysis employed throughout this research project, it is crucial to acknowledge and address the limitations that arose during the study. By recognizing these limitations, we not only ensure a transparent evaluation of the research process but also shed light on potential areas for future investigations to refine and expand upon the findings.

In this section of the chapter, the limitations encountered in this thesis are highlighted as follows:

Despite the meticulous methodology and extensive analysis employed throughout this research project, it is crucial to acknowledge and address the limitations that arose during the study. By recognizing these limitations, we not only ensure a transparent evaluation of the research process but also shed light on potential areas for future investigations to refine and expand upon the findings.

In this section of the chapter, the limitations encountered in this thesis are highlighted as follows:

1. Due to the complexity of the concept, obtaining quantitative responses proved to be exceedingly challenging.

2. The development of improved scales for scoring could have enhanced the research if implemented.

3. The inclusion of a greater number of relevant variables could have provided a more comprehensive and in-depth understanding of the research topic.

4. Deploying mathematical optimization and simulations could have effectively integrated and co-integrated the seemingly disparate aspects of climate change perception, uncertainty perception, and perception of agricultural dynamics.

5. Presently, farmers are hesitant to engage in conversations and provide data to individuals outside their close social circles.

8.1. Limitations

The most important limitations which have been observed in this research are as follows:

1. Bench marking on the status of reigning uncertainty and chaos on farming’has really been a difficult task.
2. There are problems of overlapping of some variables that could have been avoided.
3. Some new scales could have been better if created.
4. Since the concept is complex, it was very difficult to get qualitative response.
5. Farmers nowadays are reluctant to engage in conversation and produce data.
6. Due to non-random sampling , there is possibility of error or biases.

Limitations
• Data Reliability and Availability: The availability and dependability of data is one major drawback. Accurate assessments of livelihood dynamics can be hampered by the absence of complete and current data that is frequently present in rural areas. Research results may also be impacted by data inconsistencies seen in local reports, surveys, and official sources.
• Complex and Dynamic Variables: Because livelihood transitions are multifaceted and influenced by a variety of policy, environmental, and socioeconomic factors, it can be difficult to separate out and evaluate individual components. The interaction of these variables may make it more difficult to determine the precise cause and effect correlations.
• Temporal and Spatial Variability: The dynamics of livelihood can change dramatically over time and between Bengal’s many regions. The generalizability of results and suggestions may be limited by the nonuniform application of research findings across domains.
• Implementation Difficulties: Implementation issues with well-designed policies and initiatives can include local opposition, corruption, and ineffective bureaucracy. These difficulties may impede the efficacy of interventions and make evaluating their effects more difficult.
• Response Variability and Adaptation: Rural communities’ responses to changes in the economic, environmental, or social spheres can vary greatly. Adaptation techniques can be influenced by local cultural norms, resource availability, and unique household situations, making it challenging to create universally applicable solutions.
• Future Uncertainties: The trajectory of livelihood transitions may be impacted by uncertainties about future technical advancements, economic situations, and the effects of climate change. Accurately predicting these changes is intrinsically difficult, which may compromise the validity of subsequent estimates and suggestions.

A student investigator confronted time constraints, such as course credit pressure, and resource constraints, such as physical, budgetary, and managerial constraints, in the current investigation. However, every effort and consideration made the study as objective and scientific as feasible. Despite the researcher’s best efforts, the study depends on the respondents’ opinions, which may or may not be devoid of their perceptions and biases.

As a result, it is a modest piece of labour that may be completed over a more extended period.

Suggestions for Future Research

• The findings of the present study warrant the need for further investigations in several directions. The following suggestions are made for further research in the following areas.

• The study was confined to one state; therefore, the results cannot be generalised to the whole country. Similar analyses can be taken up in other states to generalise the results.

8.1 Limitations

1. The research was limited to a specific geographic area.

2. The study was constrained by limitations in time and reSources.

3. The study relies on the subjective opinions of the participants, which may be influenced by their individual perspectives and biases, despite the researcher’s efforts to gather them as objectively as possible.

4. It would have been advantageous to include a broader range of relevant variables in the study.

5. A suitable statistical model could have been employed to provide thematic support for the behavior and functioning of the system.

6. The selection of variables could have been expanded by incorporating additional variables that would have demonstrated resilience in domain interactions.

Results of intensive researches in the field of synthetic seed technology seem promising for propagation of crop plants. However, as described in literature, the major stumbling block in establishing artificial seed production as a viable technology is a lack of understanding of the somatic embryo process and an inability to consistently produce high-quality propagules that can germinate in a soil environment with an acceptably high success rate7. Several aspects of the techniques are still underdeveloped and hinder its commercial application.

10.1. LACK OF STANDARD PROTOCOLS

The synthetic seed technology application in a commercial scale is still hampered by the low efficiency of the protocols and logistic behind it. Till today standard protocol for synthetic preparation is available for a limited number of plant species.