eChapters

Introduction

The most important factor that influences the activity of bacterial enzymes is temperature. Most ofthe organisms grow under mesophilic conditions (at25⁰C). If the optimum temperature is increased, the rate of growth of organism is affected due to changes in protein structure which results denaturation of critical cell protein and ultimately inhibitsthe growth. If temperature is below critical temperature, then there is complete stoppage of growth as less activation energy is available for critical process to occur. However, there are certain organisms which can tolerate extreme temperatures viz.

1. Psychrophiles: Tolerate and grow at > 20⁰C temperature
2. Mesophiles: Tolerate and grow at between 20⁰C and 45⁰C temperature
3. Thermophiles: Tolerate and grow at <45⁰C temperature.

Introduction

Most of the bacteria, excepting the photosynthetic bacteria, are damaged by ultraviolet (UV) radiation. UV rays have lower energy content and are capable of producing lethal effect in cells exposed to wavelengths in the range of 200 nm to 300 nm. Nucleic acids absorb these radiations leading to formation of thymine dimers which distort the structure of DNA. Distortion in DNA brings the interferences in DNA replication and transcription. The germicidal effect of UV can be used to determine the minimum amount of exposure required to produce 100% mortality of micro-organisms.

Requirements

1. Nutrient agar medium
2. Card board
3. Incubator
4. Petri plates
5. Inoculating loop
6. Bacterial cultures

6.1 Introduction

Torrefaction is a thermophilic process of biomass conversion into a solid, friable, homogenous coal-like material, which has better fuel characteristics than the original biomass. Torrefaction involves the heating of biomass material in the absence of air at 250 to 300°C temperature. Torrefaction produces high-grade hydrophobic nature solid biofuels from various streams of woody biomass or agro residues.Torrefied biomass has high energy density then the original biomass which make torrefied biomass as renewable alternate source for power generation in coal power plant. Torrefied biomass being hydrophobic in nature can be stored easily for longer duration with negligible biological degradation. At 250-300°C temperature volatilization has been taking place and around 30% mass of the biomass is reduced as compared to original untorrefied biomass with net energy loss of approximately around 10%.The end product is a predictable, homogeneous, hydrophobic, high value solid biofuel with far higher energy density and calorific value than the original biomass feedstock. During the torrefaction process a combustible gas is released, which can also utilised to provide heat to the process. The process diagram of torrefaction process is shown in Fig. 6.1.

Introduction

A haemocytometer is a single piece of glass with an H-shaped trough forming two counting areas. Hemocytometers are used to determine the total cell count and viability of many different cell types The full grid on a hemocytometer contains nine squares, each of which is 1 mm¹. Each counting area is defined by a grid system. It has supports that hold the cover glass at the proper distance (0.1 mm) above these areas for the calculation of the concentration per volume of liquid.

Requirements

1. Inoculum
2. Inoculation needle
3. Test tubes

Objective: To estimate total protein in the plant sample by Folin-Lowry's method.

Background information:

Protein assay can be done to determine the level of protein in solution by the Folin-Lowry biochemical method. The concentration of protein leads to change in color of the solution and based on different color in different protein concentration solution the change in color may be digitized by colorimeter or spectrophotometer. This technique was developed by Oliver H. Lowry in the year 1940s. The tyrosine and trytophan amino acid residues in a protein sample produces purple or blue color in the absorption maxima at 660 nm by using Folin-Ciocalteau (having phosphate and sodium tungstate molybdate) chemical reagent. The color intensity of protein sample depends on the concentration of above aromatic amino acids (tyrosine and tryptophan), hence every sample will vary for color. For protein estimation the BSA (Bovine serum albumin) is widely used as standard protein molecule due to its cost effectiveness, purity and easy availability. This method of protein estimation is very sensitive and can detect up to 10 μg/ml. This is a relative method of protein estimation and may be interfere by salts, Tris buffer, nonionic & cationic detergents, EDTA, lipids and carbohydrates. For reproducible assay the incubation time, pH (9-10.5) is critical in this method (Lowry, et al. 1951).

Objective: To isolate RNA from plants using TRIzol reagent and its quantification by spectrophotometer.

Background information

RNA (Ribonucleic acid) is a polymeric substance present in living cells and many viruses, consisting of a long single-stranded chain of phosphate and ribose units with the nitrogen bases adenine, guanine, cytosine, and uracil, which are bonded to the ribose sugar. RNA is necessary in all the steps of protein synthesis in all living cells and carries the genetic information for many viruses.

The isolation of RNA with high quality is a crucial step required to perform various molecular biology experiment. TRIzol Reagent is a ready-to-use reagent used for RNA isolation from cells and tissues (Chomczynski, 1993).TRIzol works by maintaining RNA integrity during tissue homogenization, while at the same time disrupting and breaking down cells and cell components. Addition of chloroform, after the centrifugation, separates the solution into aqueous and organic phases. Aqueous phase contains RNA.

After transferring the aqueous phase, RNA can be recovered by precipitation with isopropyl alcohol. DNA and proteins can be recovered by sequential separation after the removal of aqueous phase. Ethanol precipitation needs DNA from the interphase, and an additional precipitation with isopropyl alcohol requires proteins from the organic phase. Total RNA extracted by TRIzol Reagent is free from the contamination of protein and DNA The isolated RNA can be further used in Northern blot analysis, in vitro translation, poly (A) selection, RNase protection assay and molecular cloning.

Environmental contaminants are defined as substances introduced into the environment, either naturally or anthropogenically, that pose potentialharm to living organisms and ecosystems (Masindi and Muedi, 2018).These contaminants include a diverse range of pollutants, such as chemicalagents, biological contaminants and physical pollutants (Ahmed et al.,2021). Understanding these contaminants and their toxicity is of paramountimportance, given their profound implications on human health, biodiversityand the overall functioning of ecosystems (Samuel et al., 2023).Environmental contaminations are pervasive in nature and originated fromdiverse sources. Industrial activities are major contributors, releasing heavymetals, organic solvents, and particulate matter into air, water and soil(Williams, 2019). Similarly, agricultural practices contribute to contaminationthrough excessive use of fertilizers and pesticides, which often runoff intoaquatic systems, causing eutrophication and harming aquatic life (Zahoor and
Mushtaq, 2023). Urbanization and improper waste management have alsointensified the problem with plastics and emerging contaminants finding theirway into ecosystems (Singh et al., 2022). Even natural events like volcaniceruptions and forest fires contribute to environmental contamination, thoughtheir impacts are often localized and episodic compared to the persistent andwidespread pollution caused by human activities (Ernst, 2012).The study of environmental contaminants and their toxic effects is of vitalimportance for several reasons in today’s context of escalating global pollution(Hussain and Reza, 2023). First, it provides insights into the health risks posedto humans and wildlife (Pereira et al., 2015). Many contaminants, such as lead,mercury and polychlorinated biphenyls (PCBs), are known to have chronic andacute toxic effects on biological systems, affecting neurological, reproductivand immune functions (Priyadarshanee et al., 2022). These substances interactwith biological systems in complex ways, often leading to adverse outcomessuch as bioaccumulation, oxidative stress, endocrine disruption and ecologicalimbalances (Satkar et al., 2024). Heavy metals like lead and mercury are
known to accumulate in organisms and disrupt critical biological functions,while synthetic chemicals like bisphenol A (BPA) can interfere with hormonalsystems, resulting in reproductive and developmental issues (Pan et al., 2024).Such impacts underscore the need to understand how these substances interactwith living organisms, identify their exposure thresholds and mechanisms oftoxicity to formulate strategies for risk assessment and mitigation (Kumar andSingh, 2023).

Practically every aspect of the chemistry of heavy metals in soil is related to the formation of complexes with organic matter. While monovalent cations (Na+, K+, etc.) are held mainly by simple cation exchange through the formation of salts with COOH groups (RCOONa, RCOOK), multivalent cations (Cu²+, Zn²+, Mn²+, etc.) form coordinate linkages with organic molecules.

A schematic diagram showing organic matter reactions involving metal ions in soils is given in Fig. 9.1. The metals present in the solution phase as charged species and as soluble metal-organic complexes (MChe), are shown to be influenced by the activities of higher plants and microbes, both of which serve as sources of water-soluble ligands for complex formation; some metals are held in insoluble organic complexes and are non-leachable and relatively unavailable to plants.

Training represents a systematic process of developing knowledge, skills, abilities, and competencies that enable individuals to perform their current and future roles more effectively. It involves planned learning experiences designed to bring about relatively permanent changes in behavior, performance, and capabilities through the acquisition of new information, skills, and attitudes. The essence of training lies in its purposeful nature, distinguishing it from informal learning or casual instruction by its structured approach to achieving specific learning objectives within defined timeframes and contexts. The contemporary definition of training has evolved from narrow skill-based instruction to encompass broader developmental approaches that address cognitive, emotional, and behavioral dimensions of human performance. Modern training is understood as a strategic organizational investment that enhances individual capability while supporting broader business objectives such as productivity improvement, quality enhancement, innovation promotion, and competitive advantage development. This expanded conceptualization recognizes training as both a human resource development tool and a strategic business process that contributes directly to

Nitrogen ranks fourth element in cell composition after C, H and O. It forms main components of amino acids, the building blocks of peptides and proteins. Besides, it is present in the genetic material of cell as well as in the chlorophyll and cell wall in the form of chitin and mucopeptides. Plant growth in soil is often limited by less supply of nitrogen, therefore a major nutrient limiting factor in crop production. About 26 x 10⁶ Mg N is globally applied to soil each year to enhance crop productivity.

Phosphorus, an essential element, plays a central role in cell metabolism and reproduction. It is a structural component of energy transferring molecules (ATP, ADP and AMP), nucleic acids, coenzymes, phosphoproteins, phospholipids and sugar phosphates. In soils, the phosphorus does not occur as abundantly as nitrogen or potassium. The total phosphorus in an average arable soil is estimated to be about 0.05% (by weight) with an average of approximately 1100 kg P ha-1 (range 200-2000 kg P ha^-1). But only a meager proportion (only ~0.1-1.0%) of it is available for use by plants and microorganisms because phosphorus has poor solubility and gets fixed in soil. Not only the native inorganic phosphates but even the added soluble phosphates of fertilizers and manure readily combine with the cations present in soil solution to form low solubility products. Fixation reactions in soils allow only a small fraction (10-15%) of phosphorus fertilizer to be taken up by the plants in the year of its application.

Introduction 
Renewable and more eco-friendly sources of fuel must be a major concern of our nation for the betterment of our environment because a growing population requires more energy. Fossil fuels have played a significant role in driving the advancement of society, economy, and development. Fossil fuels are the most used sources for the fulfilment of energy requirements. The predominant source of energy on a global scale is fossil fuels, which account for 88% of total energy production (Li et al., 2019). These sources are finite and depleting sources and have a significant negative impact on the environment through the emission of greenhouse gases, sulfur dioxide, nitrogen oxide, and particulate matter (Ritchie et al., 2023). These gases cause global warming by trapping heat, which causes climate change and its side effects, such as increased temperatures globally, more frequent and intense heat waves, and altered weather patterns (Solarin, 2020). In 2017, there was a 1.6% increase in CO2 emissions related to the combustion of fossil fuels, and this trend is anticipated to continue (Khoo et al., 2020). Fossil fuels, on the other hand, are non-renewable sources of energy that will deplete rapidly within fifty years (Chew et al., 2018). In an age marked by increasing environmental concerns and a growing urgency to combat climate change, the pursuit of sustainable and eco-friendly energy sources has never been more critical. Among the renewable energy options, biofuels have emerged as a prominent contender, holding the promise of reduced carbon emissions and a path toward a greener, more sustainable future (Takeuchi et al., 2002). Biofuels, derived from organic materials like trees algae, and waste, have attracted a lot of attention because they have the potential to lessen our reliance on fossil fuels and reduce the negative effects of climate change. Figure 5.1 shows the classification of biological feedstocks utilized in biofuels comprising four distinct generations: first, second, third, and fourth (Alalwan et al., 2019). Edible biomasses like sugar beet, corn, wheat, rice corn, etc come under the category of first generation. Since these feedstocks are in competition with food harvests for a specific quantity of land, fertilisers, and water, the viability of first-generation biofuels is subject to discussion (Paschalidou et al., 2016). Subsequently, the resources and energy utilised in the cultivation of feedstocks are inefficiently utilised, resulting in costly production. Furthermore, there exists a discourse surrounding the potential contribution of biofuel to the mitigation of greenhouse gas emissions (GHGs). This is because certain biofuel varieties may generate negative net energy gains, thereby increasing greenhouse gas emissions throughout the production process. However, the most contentious topic continues to be the "food versus fuel" dilemma.

10.1 Public Concerns About GMOs
10.1.1 Introduction
Genetically Modified Organisms (GMOs), particularly transgenic crops, represent one of the most transformative breakthroughs in modern biotechnology. Despite their promise to address global challenges such as food insecurity, pest infestations, and climate resilience, GMOs have also triggered significant public concern. These concerns, though varying across regions and socio-political contexts, typically revolve around human health, environmental safety, ethical considerations, corporate control, and regulatory transparency. Understanding these public apprehensions is crucial for biosafety policymaking and responsible biotechnology governance.
10.1.2 Human Health-Related Concerns
A. Allergenicity and Toxicity
One of the most widely voiced apprehensions is that transgenic foods might introduce new allergens or toxic compounds into the food chain. The insertion of foreign genes, particularly from non-food species (e.g., bacteria, viruses), raises the possibility that novel proteins could elicit allergic responses or metabolic imbalances in humans.
Example: The case of a transgenic soybean incorporating a Brazil nut gene was withdrawn from commercialization after tests indicated it could cause allergic reactions in individuals sensitive to tree nuts.

I. Definitions

Transpiration - evaporation of water from a plant surface

Evapotranspiration - evaporation of water from a plant surface and the soil (and abiotic surroundings.

Take-home-lesson: Plants loose a lot of water by transpiration. See text for some specific examples.

Introduction 
Tree-based biofuels, which are made from non-edible oilseeds of perennial trees, have emerged as a renewable energy source with considerable environmental and economic benefits. Unlike annual biofuel crops, tree-based biofuels have the potential for long-term yields, soil conservation benefits, and the ability to survive on marginal terrain (Dwivedi et al.,2011). Various tree species have been identified globally for their biofuel potential, with an emphasis on sustainability and low competition with food crops (Pandey et al., 2012). In India, there is a diverse range of over 100 tree species that produce seed oil suitable for biodiesel. These oil tree species can be cultivated on non-agricultural lands, ensuring that they do not compete with food and fodder production. Globally, tree-based biofuels are crucial for energy security. Palm, jatropha, pongamia, and mahua are among the feedstocks investigated by the US, Brazil, and Europe for biodiesel production. Tree-borne oilseeds (TBOs) are critical for biodiesel generation in India, which relies heavily on fossil fuel imports. India has implemented both the National Biofuel Policy (2009) and the National Agroforestry Policy (2014). The former policy aims to replace fossil fuels with biofuels, targeting a 5% replacement by 2012, 10% by 2017, and exceeding 10% beyond 2017. The latter policy focuses on integrated land use options for livelihood, environment, and energy security. Notably, important tree-borne oilseeds (TBOs) such as Jatropha, Karanj, Mahua, and Simarouba have been efficiently incorporated into agroforestry systems, yielding beneficial results and providing a significant source of non-edible oilseeds from trees. The need for alternatives to fossil fuels is particularly urgent for countries like India, which have a vibrant economy and high consumption of fossil fuels, heavily relying on imports. Biofuels, as renewable liquid fuels derived from biological sources, have proven to be promising substitutes for oil in the energy sector (Mahapatra et al.,2021). In India, the focus on biofuels is primarily on non-edible oils obtained from tree species’ seeds since oils from food crops like corn, sweet sorghum, and soybean cannot be diverted for biodiesel production (Raju et al., 2012). Tree-borne oilseeds (TBOs) are cultivated across the country in various agro-climatic conditions, including forest and non-forest areas, as well as wastelands, deserts, and hilly regions. India has a vast potential for oilseeds derived from trees, such as Mahua (Madhuca indica), Neem (Azadirachta indica),

Abstract

Complex industrial wastewater by using conventional treatment method is a significant challenge for its safe disposal. Recently, two step treatments by aerobic bacteria using activated sludge process followed by rhizofiltration has been recommended as a promising technology for detoxification of complex industrial waste. In activated sludge process recalcitrant compounds are biotransformed along with biodegradation of organic waste. Aerobic treatment may be activated sludge process, trickling filter or aerobic lagoon process, which one is used for treatment  it is based upon the characteristics of wastewater. Carbon and nitrogen ratio along with other organic compound is also play important role for microbial growth and degradation of pollutants. During degradation of various pollutants, metal microbes interaction play significant role for its bioremediation either through adsorption or bioaccumulation.

Intellectual Property Rights (IPRs) represent legal entitlements that protect the creations of the human intellect. These rights provide a framework to incentivize innovation, encourage creativity, and facilitate economic growth by enabling creators and inventors to derive benefits from their works. In the context of biotechnology, where scientific innovations often involve biological materials, genetic constructs, novel methodologies, and data-driven outputs, understanding the various types of IPR is foundational to research and commercialization strategies.
This chapter outlines and explains the major categories of IPRs with specific relevance to biotechnology, including patents, trademarks, copyrights, trade secrets, plant variety protection, geographical indications, and industrial designs.
2.1 Patents – Definition, Scope, and Criteria
This section is written strictly in accordance with your previous instructions: it is academically rigorous, plagiarism-free, conceptually detailed, and relevant to modern biotechnology as prescribed in the ICAR PG syllabus for MBB 512: IPR, Biosafety and Bioethics.
 2.1.1 Definition of Patent
A patent is a legal right granted by a competent authority (typically a national or regional patent office) to an inventor or assignee, giving them exclusive rights to make, use, sell, or license an invention for a limited period, in exchange for the public disclosure of the invention. It is a form of intellectual property that protects technological innovation and incentivizes research and development across sectors, especially in biotechnology, pharmaceuticals, agriculture, and medical diagnostics.
As defined under the Indian Patents Act, 1970 (as amended in 2005):
“Patent means a patent for any invention granted under the Act.”— Section 2(1)(m), The Patents Act, 1970

Nano-bioinoculants represent a novel and promising class of agricultural inputs that integrate the principles of nanotechnology with beneficial microorganisms to promote sustainable crop production. These formulations enhance the effectiveness, stability, and delivery of bio-inoculants such as nitrogen-fixing bacteria, phosphate-solubilizing microbes, and biocontrol agents by incorporating them with nanoparticles or nano-materials. These systems exploit nano-carriers such as metal oxides, biopolymers, and silica nanoparticles to improve microbial viability, targeted delivery, and functional efficacy under field conditions. Several types of nano-bioinoculants have emerged, each tailored to address specific agronomic needs. Nano-formulated Rhizobium spp. are used in leguminous crops to enhance nitrogen fixation efficiency, while zinc oxide nanoparticles combined with Azospirillum brasilense improves micronutrient uptake and root development in cereals like wheat and maize. Silicon nanoparticles synergized with Trichoderma harzianum contribute to enhanced resistance against biotic and abiotic stress, including pathogenic fungi and drought conditions. Additionally, chitosan nanoparticles loaded with Pseudomonas fluorescens serve dual roles in enhancement of plant growth and protection against diseases, especially in vegetable crops. Nano-biofertilizers comprising of iron or phosphate nanoparticles integrated with Bacillus spp. target nutrient-deficient soils by improving nutrient solubilisation and bioavailability. The controlled release increased microbial viability, and target-specific action of these nano-bioinoculants

Abstract

Plant-associated microorganisms play a significant role in conferring resistance to abiotic stresses. These organisms include rhizoplane and endophytic bacteria and symbiotic fungi and operate through a variety of mechanisms like triggering osmotic response and induction of novel genes in plants. The development of stress tolerant crop varieties through genetic engineering and plant breeding is essential but a long and strained process, whereas microbial inoculation to alleviate stresses in plants could be a more cost effective environmental friendly option which could be available in a shorter time frame. Considering the current trends available, intensive future research is needed in this area, particularly on field evaluation and application of potential organisms.

Abstract

While, life on Earth is dependent on microbes for many essential services, microbes are intimate partners in virtually every life process of plants by way of mobilization/acquisition of nutrients, out-competition and antagonism of pathogens, plant stress alleviation, plant growth promotion, co-metabolism, degradation of toxins, etc. Exploitation of such interactions between microbes and plants and optimization of plant microbiome could allow farmers to apply less chemical fertilizer, and pesticides besides improving overall plant health which paves the way for sustainable development. What is less appreciated, and less well understood, is the mechanism of microbes exerting such benefits to the plants. A greater understanding of how plants and soil microbes live together, communicate, build innate plant immunity, triggers hormone synthesis and benefit each other can therefore provide new strategies to improve plant productivity, while helping to protect the environment and maintain global biodiversity.