Samacheer Class 12 Bio Botany - Plant Tissue Culture

The process illustrated is plant tissue culture, a technique that involves growing plant cells, tissues, or organs in a sterile laboratory environment on a nutrient medium. This method allows for rapid propagation, genetic manipulation, and conservation of plants. Based on the type of explant used, plant tissue culture is broadly classified into several types. Organ culture involves the growth of specific plant organs like roots, shoots, or leaves from explants. Meristem culture utilizes the apical or axillary meristems to regenerate entire plants, which are often virus-free. Protoplast culture involves the isolation and culture of plant cells after the removal of their cell walls, allowing for somatic hybridization. Cell culture, also known as cell suspension culture, involves growing isolated cells or small cell aggregates in a liquid nutrient medium.

The growth of microbes in the nutrient medium during the culture process can be effectively prevented and controlled through several sterilization techniques. Autoclaving is the most common and effective method, in which the culture medium is sterilized at a temperature of 121 degrees Celsius under a pressure of 15 psi for 15 to 30 minutes, depending on the volume and composition of the medium. This high temperature and pressure treatment effectively kills all microorganisms, including bacteria, fungi, and their spores. Chemical sterilization using various chemical agents such as ethanol, mercuric chloride, or sodium hypochlorite can also be employed to sterilize media and equipment. UV radiation is another technique that can be used to sterilize surfaces and some materials, as ultraviolet light damages the DNA of microorganisms, preventing their reproduction. Filtration sterilization using membrane filters with pore sizes of 0.22 micrometers can be used to sterilize heat-sensitive solutions and media components that cannot withstand autoclaving. Additionally, proper aseptic technique during the culture process, including the use of laminar flow hoods, sterilized instruments, and careful handling procedures, is essential to minimize contamination. The choice of sterilization method depends on the nature of the material being sterilized and the requirements of the specific culture system.

Cell suspension culture is defined as the in vitro cultivation of single plant cells or small aggregates of cells in a liquid nutrient medium. This method is particularly useful for the production of secondary metabolites, which are chemical compounds not essential for the plant's basic growth and development but often possess valuable pharmaceutical or industrial properties. The process begins with the establishment of a callus culture, which is then transferred to a liquid medium. Cells proliferate and form a suspension. These cultures can be scaled up in bioreactors for commercial production of various compounds such as alkaloids, flavonoids, terpenoids, phenolic compounds, and even recombinant proteins. Strategies like biotransformation, where cells modify a precursor molecule, elicitation, where external stimuli are used to enhance metabolite production, and immobilization, where cells are confined to a support matrix, are employed to increase the efficiency and yield of secondary metabolite production in cell suspension cultures.

Embryoids, also known as somatic embryos, are structures that resemble zygotic embryos and are formed directly from somatic cells or tissues through a process called somatic embryogenesis. This process involves the dedifferentiation of somatic cells to form a callus or embryogenic cell mass, which then redifferentiates to produce bipolar structures with distinct shoot and root apical meristems, similar to a zygotic embryo. The applications of somatic embryogenesis and the resulting embryoids are significant in plant biotechnology. They provide a means to regenerate complete plantlets in vitro, which, after a hardening period to adapt to ex vitro conditions, can be established as whole plants. Furthermore, somatic embryoids are crucial for the production of synthetic seeds, where they are encapsulated with protective materials like alginate and nutrients, allowing for easier storage, handling, and sowing. Somatic embryogenesis has been successfully induced in a wide range of plant species, including important crops like rice (Oryza sativa), maize (Zea mays), barley (Hordeum vulgare), and even some recalcitrant species like garlic (Allium sativum), making it a versatile tool for plant propagation and research.

Basic concepts of plant tissue culture are totipotency, differentiation, differentiation, and redifferentiation.
1. Totipotency: The property of live plant cells that they have the genetic potential when cultured in a nutrient medium to give rise to a complete individual plant.
2. Differentiation: The process of biochemical and structural changes by which cells become specialized in form and function.
3. Redifferentiation: The further differentiation of already differentiated cell into another type of cell. For example, when the component cells of callus have the ability to form a whole plant in a nutrient medium, the phenomenon is called redifferentiation.
4. Dedifferentiation: The phenomenon of the reversion of mature cells to the meristematic state leading to the formation of callus is called dedifferentiation. These two phenomena of redifferentiation and dedifferentiation are the inherent capacities of living plant cells or tissue. This is described as totipotency.

Based on the explants some other plant tissue culture types are:
1. The culture of embryos
* anthers
* ovaries
* roots
* shoots etc
2. Meristem culture
The culture of any plant meristematic tissue on culture media.
3. Protoplast culture
* Protoplasts (cells without a cell wall, but plasma membrane) are used to regenerate whole plants from single-cell protoplasts of 2 different plants fused into hybrids – later by PTC – develop into many plantlets.
* This process of formation of somatic hybrids into somatic hybridization.
4. Cell culture
* The formation of cell suspension from the callus
* The cells are separated from the callus tissue and used for cell suspension culture

Cryopreservation, also known as Cryo-conservation, is a process by which protoplasts, cells, tissues, organelles, organs, extracellular matrix, enzymes or any other biological materials are subjected to preservation by cooling to a very low-temperature of-196°C using liquid nitrogen. At this extremely low temperature, any enzymatic or chemical activity of the biological material will be totally stopped and this leads to the preservation of material in dormant status.
Later these materials can be activated by bringing to room temperature slowly for any experimental work. Protective agents like dimethyl sulphoxide, glycerol, or sucrose are added before the cryopreservation process. These protective agents are called cryoprotectants since they protect the cells, or tissues from the stress of freezing temperature.

Germplasm conservation refers to the preservation of the genetic diversity of living organisms, particularly plants, for future use. This involves maintaining viable genetic resources such as seeds, pollen, tissues, or even whole plants under controlled conditions to prevent their loss. The primary purpose of germplasm conservation is to safeguard genetic variability, which is essential for crop improvement through hybridization and breeding programs, as well as for adaptation to changing environmental conditions and disease resistance. Specialized facilities like seed banks and pollen banks are established to store these genetic materials. Seed banks store seeds under low temperatures and humidity to maintain their viability for extended periods, while pollen banks preserve pollen grains. DNA banks are also maintained to store genetic material from elite or endangered plant lines. By preserving this genetic reservoir, germplasm conservation ensures the availability of valuable traits for future research, crop development, and ultimately, for maintaining food security and biodiversity.

Artificial seed preparation is a biotechnological process that involves the encapsulation of somatic embryos or other propagules in a protective coating to create synthetic seeds that can be handled and stored similarly to natural seeds. The process begins with the development of somatic embryos through tissue culture techniques, where callus tissue is induced to differentiate and form embryo-like structures. These somatic embryos are then encapsulated in a gel matrix, typically composed of sodium alginate, which forms a protective coat around the embryo. The encapsulated embryos are subsequently grown in vitro on a suitable nutrient medium where they develop into complete plantlets with both roots and shoots. Once the plantlets have attained sufficient size and development, they require a hardening period to acclimatize them to external environmental conditions. This hardening is typically conducted in a greenhouse or specialized hardening chamber where the plantlets are gradually exposed to lower humidity and higher light intensity, allowing them to develop thicker cuticles and stronger tissues. After the hardening period, the plantlets are transferred to normal environmental conditions in the field or garden where they can continue to grow and develop into mature plants. Artificial seeds offer several advantages over conventional seeds, including the ability to preserve desirable traits of elite plants, faster propagation of valuable germplasm, and the potential for long-term storage of plant material.

• An autoclave is a device used to do wet steam sterilization.
• Autoclaving at 15 psi (121°C) for 15-30 minutes.
• Glassware, forceps, scalpels, and all accessories are subjected to autoclaving for

Hardening is a crucial step in plant tissue culture that prepares in vitro-grown plantlets for survival in natural environmental conditions. During the hardening process, plantlets are gradually and steadily exposed to conditions that transition them from the controlled laboratory environment to the natural environment. In the laboratory, plantlets are accustomed to constant temperature, controlled light intensity, high humidity, and a ready-made nutrient medium that provides all essential elements. Hardening gradually reduces these artificial supports by exposing plantlets to fluctuating temperatures, varying light intensities, lower humidity levels, and eventually soil conditions. This gradual acclimation allows the plantlets to develop stronger cell walls, thicker cuticles, and more efficient root systems capable of absorbing water and nutrients from soil. Without proper hardening, plantlets would experience severe stress and high mortality rates when transferred to natural conditions, as they lack the physiological adaptations necessary to survive in the open environment.

To remove the cell wall of a plant cell and obtain protoplasts, a specific enzymatic treatment is employed. The chosen plant tissue, typically a leaf segment, is first immersed in a solution containing enzymes that degrade the cell wall. A common method involves using a mixture of enzymes like cellulase and pectinase, often in a buffered solution. For instance, the tissue can be incubated in a solution containing 0.5% macerozyme and 2% Onozuka cellulase, dissolved in a 13% sorbitol or mannitol solution. This incubation is carried out at a pH of 5.4 and a temperature of 25°C, often overnight, to allow for complete enzymatic digestion of the cell wall. After this incubation, gentle teasing of the tissue releases the protoplasts. To maintain their viability and prevent osmotic lysis, the isolated protoplasts are then transferred to a hypertonic solution, such as 20% sucrose solution. Finally, the protoplasts are separated and purified from the surrounding medium and cellular debris through centrifugation.

• The morphological changes in the callus leading to the formation of the shoot, root, and then plantlets. The plantlets formation has 2 steps
• Root formation is known as Rhizogenesis
• Shoot formation is known as Caulogenesis.

Callus is an unorganized, amorphous mass of plant cells that develops from explant tissue when cultured on nutrient medium. It represents dedifferentiated cells that have lost their specialized characteristics and divide rapidly without forming any organized structure. Callus tissue is typically friable and lacks distinct morphology. In contrast, a clone is a genetically uniform population of plantlets that develops when callus tissue undergoes redifferentiation and organogenesis. The callus differentiates to form organized structures such as shoots and roots, which eventually develop into complete plantlets. Each plantlet derived from the same callus is genetically identical to the parent plant and to all other plantlets from that callus, forming a clone. Therefore, while callus represents the intermediate undifferentiated stage, clones represent the final differentiated products that are genetically uniform and identical to the source plant.

• Hardening is the gradual exposure of invitro developed plantlets in humid chambers in diffused light – or transferred to – greenhouse setup.
• This enables them to get acclimatized to grow under normal field conditions.

Synthetic seeds, often referred to as syn-seeds, are produced using somatic embryos or other vegetative propagules that are encapsulated in a protective coating. The primary component used for syn-seed production is somatic embryoids, which are bipolar structures derived from somatic cells through somatic embryogenesis and closely resemble zygotic embryos. These somatic embryoids are then coated or encapsulated in a matrix that provides protection, nutrients, and moisture. Common encapsulation materials include hydrogels like agarose gel or alginate, typically sodium alginate. The somatic embryoids are mixed with the gelling agent and then dropped into a solution of calcium chloride, which causes the alginate to cross-link and form a protective capsule around the embryoid. This process results in a 'seed-like' structure that can be stored, handled, and sown like a true seed, offering advantages in mass propagation and germplasm storage.

PTC stands for Plant Tissue Culture, a technique used for growing plant cells, tissues, or organs in vitro. HEPA refers to High-Efficiency Particulate Air filters, which are used in sterile environments like plant tissue culture labs to remove airborne particles. RCGM stands for Review Committee on Genetic Manipulation, an Indian regulatory body that oversees the use of genetically modified organisms. GEAC is the Genetic Engineering Approval Committee, another Indian regulatory authority responsible for the approval of genetically engineered products and their release. ELSI is an acronym for Ethical, Legal, and Social Implications, referring to the broader societal considerations surrounding new technologies like genetic engineering. GMO stands for Genetically Modified Organism, an organism whose genetic material has been altered using genetic engineering techniques. GEM is Genetically Engineered Microorganism, a specific type of GMO that is a microorganism whose genetic material has been modified.

Organ culture involves the culture of intact plant organs or organ primordia such as embryos, anthers, ovaries, roots, and shoots on nutrient medium. These organs retain their organized structure and can develop further, often producing complete plants. The cultured organs maintain their original organization and can differentiate into various tissues. Meristem culture, on the other hand, involves the culture of plant meristematic tissue, which consists of actively dividing undifferentiated cells. Meristematic tissue is cultured on nutrient medium and can develop into complete plants. Meristem culture is particularly valuable for producing virus-free plants because viruses are typically absent from meristematic regions. The key distinction is that organ culture maintains pre-existing organized structures, while meristem culture uses undifferentiated dividing cells that can develop into organized structures from the beginning of culture.

Somatic embryogenesis is the process of formation of embryos from somatic cells, which are non-reproductive body cells. In this process, embryos develop directly from callus tissue or from pre-embryonic cells without the involvement of gametes or sexual reproduction. The embryos formed through somatic embryogenesis are called embryoids. These embryoids can develop either directly from the callus tissue through organogenesis or from specialized pre-embryonic cells that differentiate into embryoid structures. Somatic embryogenesis is significant because it allows the production of multiple genetically identical plants from a single explant, making it a valuable technique for plant propagation and the production of clones with desirable characteristics.

• The inherent genetic potential of any living plant cell, when cultured in the nutrient medium can develop into a complete individual plant.
• One of the basic concepts exploited in tissue culture.

Knop's solution is a widely used inorganic nutrient medium for plant tissue culture, providing essential macro- and micronutrients for plant growth. The solution is typically prepared by dissolving specific salts in deionized water and often includes sucrose as a carbon source. The main inorganic salt components, along with their approximate quantities per liter of deionized water, are: Calcium nitrate (Ca(NO3)2) - 3.0 gm, Potassium nitrate (KNO3) - 1.0 gm, Magnesium sulfate (MgSO4·7H2O) - 1.0 gm, and Dibasic potassium phosphate (K2HPO4) - 1.0 gm. In addition to these salts, sucrose is usually added as an energy source, with an optimal concentration often around 50 gm per liter. The entire mixture is dissolved in 1000 ml (1 liter) of deionized water. Variations in the concentrations of these salts and the addition of micronutrients and plant growth regulators may be made depending on the specific plant species and the type of tissue being cultured.

Several nutrient media are commonly used in Plant Tissue Culture (PTC), each with specific compositions to support plant growth in vitro. The Murashige and Skoog (MS) medium, developed by Muroshige and Skoog in 1962, is one of the most widely used and is rich in inorganic salts, vitamins, and amino acids, often supplemented with plant growth regulators like auxins and cytokinins. The Gamborg's B5 medium, formulated by Gamborg et al. in 1968, is another popular choice, particularly for cell suspension cultures, and contains a lower salt concentration than MS medium. White's medium, developed by White in 1943, is a simpler formulation often used for root cultures. Nitsch and Nitsch medium, introduced by Nitsch and Nitsch in 1969, is also utilized for various plant species. These media can be prepared in solid, semi-solid, or liquid forms. For solidification, gelling agents such as agar, a polysaccharide derived from seaweed, are incorporated into the medium, creating a stable substrate for explant growth and development.

The induction of callus is a crucial step in plant tissue culture, involving the development of an unorganized mass of plant cells from an explant. The process begins with inoculation, where a sterile piece of plant tissue, known as the explant (which can be a segment of leaf, stem, tuber, or root), is carefully transferred onto a sterile nutrient medium. This medium is typically a basal salt mixture like the MS medium, supplemented with plant growth regulators, primarily auxins, which promote cell division and dedifferentiation. Following inoculation, the culture is incubated under controlled environmental conditions, usually at a temperature of around 25°C ± 2°C. A critical aspect of incubation is the light regime, which is often an alternating 12-hour light and 12-hour dark period, although some cultures may require continuous darkness or light. Under these conditions, the cells of the explant undergo rapid cell division and differentiation, leading to the formation of a callus. A callus is defined as a mass of undifferentiated, proliferating plant cells that have lost their organized structure and are maintained in vitro on a suitable culture medium.

Somaclonal and gametoclonal variations are both forms of genetic or epigenetic changes observed in plants regenerated through in vitro culture, but they originate from different starting materials. Somaclonal variation refers to the genetic and phenotypic variability that arises in plants regenerated from somatic cells or tissues. These somatic parts can include vegetative organs like leaves, stems, roots, tubers, or even propagules such as buds or meristems. The variations observed are a result of genetic instability during the dedifferentiation and redifferentiation processes in tissue culture. In contrast, gametoclonal variation occurs in plants regenerated from gametes (sex cells) or gametophytes (the haploid generation that produces gametes) through in vitro culture techniques. This means the starting material for gametoclonal variation is haploid tissue, such as microspores or ovules, which eventually leads to the regeneration of plants. The variations observed in gametoclonal lines can also stem from genetic mutations, chromosomal abnormalities, or epigenetic modifications that occur during the culture process.

• Chemicals can be used to control fungal and bacterial mycoplasma pathogens but not viruses generally.
• Viral pathogens also cause great economic loss to the crops.
• Shoot meristem culture – help to produce virus-free plants because shoot meristem is free of viruses.

• Number/ time / cost – Millions of seeds produced / at any time / cheaper cost.
• Method – Easy method to produce genetically engineered plants.
• Quality – Seeds with desirable traits are produced.
• Storage – can be stored for long time use by Cryopreservation method.
• Nature of plants – Plants – Produced are identical
• Period of dormancy – greatly reduced
• Growth & Lifespan – grow faster, plants have a shorter life span

• Somatic hybridization → Improve hybrids produced
• Somatic embryoids → develop into syn – seeds help to conserve biodiversity
• Meristem & Shoot tip culture → production of Disease Resistant Varieties
• Production of plants → Stress resistant → herbicide tolerant → Drought tolerant
• Micropropagation → Large number of plantlets produced in a short time & throughout the year of both
• crop plants & true species – Used in Forestry

• Plant tissue culture is the conventional method which is also known as micropropagation.
• In this method, we take the meristematic tissue of the plant, referred to as explant is cultured over the given conditions of temperature and humidity, which makes the plant disease resistant.

A patent is a legal document that grants exclusive rights to an inventor for their invention. It typically consists of three main parts: the grant, the specifications, and the claims. The grant is the formal document issued by the patent office, signed by the relevant authority, which officially confers the patent rights to the inventor. This part is generally not published. The specifications provide a detailed and comprehensive description of the invention. This includes explaining the background of the invention, the problem it solves, the technical details of how it works, and how it can be made and used. The specifications are crucial for enabling someone skilled in the relevant field to understand and replicate the invention. The claims are the most critical part of the patent, as they precisely define the scope of the invention for which protection is sought. They outline what the inventor considers their unique contribution and what others are legally prohibited from making, using, or selling without permission. The claims determine the boundaries of the patent protection.

Intellectual Property Rights (IPR) refer to creations of the mind, such as inventions, literary and artistic works, designs, and symbols, names, and images used in commerce. It is a category of property that includes products created through one’s knowledge, research, and creativity. Key aspects of IPR include copyrights, which protect original works of authorship; patents, which protect inventions; and trademarks, which protect brand names and logos. Additionally, IPR encompasses trade secrets, which are confidential business information that provides a competitive edge; publicity rights, which control the commercial use of one's identity; moral rights, which protect the integrity of artistic works; and rights against unfair competition. Designs and geographical indications, which identify a product's origin and quality, are also protected under IPR. The fundamental principle of IPR is that the owner of the intellectual property has exclusive rights to use, exploit, and benefit from their creation. These rights must be protected by the enforcement of laws framed by a country, preventing others from using the protected property without legal permission or proper authorization.

• It will bring in a great revolution like the computer revolution.
• It will lead to new scientific – revolutions that would change the lives & future of people.
• Major challenges will be met and major changes incomprehensible in many aspects of modern life.

• It regulates -manufacturing, use, import, export, and storage of hazardous microbes or genetically modified organisms (GMOs) and cells in the country.
• It approves – activities involving large-scale use of hazardous microbes and recombinants in research & Industrial production.
• It is responsible – for approval of proposals relating to the release of GEO and products into the environment including experimental field trials (Biosafety Research Level – trial – I and II are known as BRL – I and BRL – II)

• Privacy and fairness in the use of genetic information, including the potential for genetic discrimination in employment and insurance.
• The integration of new genetic technologies such as genetic testing, into the practice of clinical medicine.
• Ethical issues surrounding the design and conduct of genetic research with people, including the process of informed consent.

Effective Plant Tissue Culture (PTC) relies on well-equipped laboratory facilities designed to maintain sterile conditions and provide optimal growth environments. Essential facilities include a washing area for thorough cleaning and sterilization of glassware, followed by ovens for drying. A dedicated medium preparation room is crucial, equipped with precise instruments such as an autoclave for sterilizing media and equipment, an electronic balance for accurate weighing of components, and a pH meter to ensure the correct acidity or alkalinity of the nutrient solutions. The culture facility itself is the core area where plant tissues are grown. This involves incubators or growth chambers that maintain a stable temperature, typically between 22-28°C, and provide controlled illumination. Light intensity is usually around 2400 lux, with a photoperiod of 8-16 hours per day, supporting photosynthesis. Maintaining a relative humidity of about 60% is also important to prevent desiccation of the cultures.

• Haberlandt (1902) – In-vitro culture of plant cells – (using knop’s salt solution + glucose & peptone)
• He proposed the Totipotency concept.
• P.R.White (1934) – In Knop’s solution + 3 vitamins (Pyridine, thiamine & nicotinic acid → developed root culture)
• F.C.Steward (1948) – used coconut water → produced cell proliferates from carrot explants.
• Morel & Martin (1952, 55) – Produced virus-free plants by shoot meristem culture → Eg. Dahlia, Potato.
• Murashige & Skoog (1962) – Most frequently used culture medium for all kinds of tissue culture work.
• Guha & Maheswari (1964) – developed in-vitro production of haploid embryos from another of Datura.
• Vasil & Hildbrandt (1965) – developed a tobacco plant by micropropagation.

Successful Plant Tissue Culture (PTC) depends on maintaining specific environmental conditions that mimic or optimize plant growth in vitro. The pH of the culture medium is critical, typically maintained between 5.6 and 6.0, as deviations can affect nutrient availability and plant development. Temperature is another key factor; incubation of cultures is normally carried out at 25°C ± 2°C to ensure optimal growth rates for most plant species. Humidity and light intensity also play significant roles. A relative humidity of 50-60% is generally maintained within the culture vessels or chambers to prevent excessive water loss. The light requirement is usually met by providing a photoperiod of 16 hours of light, supplied by cool white fluorescent tubes at an intensity of approximately 1000 lux, which is sufficient for photosynthesis without causing heat stress. Aeration is also important, especially for liquid cultures, and is provided either by the gentle shaking of flasks or tubes on an automatic shaker or by passing filter-sterilized air through the medium to ensure adequate oxygen supply and carbon dioxide exchange.

The laboratory setup for Plant Tissue Culture (PTC) requires specialized facilities to ensure sterility and provide optimal growth conditions. Essential infrastructure includes a washing and drying area for glassware, equipped with ovens for thorough drying. A dedicated medium preparation room is vital, containing an autoclave for sterilization, an electronic balance for precise measurements, and a pH meter to adjust the nutrient solution's acidity. Maintaining aseptic conditions is paramount, achieved through the use of a laminar air flow bench, which provides a sterile working environment, and a positive pressure ventilation unit equipped with High-Efficiency Particulate Air (HEPA) filters to prevent microbial contamination. The culture facility itself is where the inoculated explants are grown. This involves culture tubes or vessels maintained at a controlled temperature, typically between 22-28°C. Illumination is provided by lights, often fluorescent tubes, delivering approximately 2000 lux with a photoperiod of 8-16 hours per day. Maintaining a relative humidity of about 60% within the culture environment is also crucial for preventing dehydration of the plant tissues.

Protoplasts are cells without a cell wall but with a cell membrane or plasma membrane.
1. Isolation of protoplast
2. Fusion of protoplast (Agglutination & Fusion)
Protoplast (A) + Protoplast (B) – fused in to one in the presence of Fusogenic agent PEG in 25 – 30% concentration (Poly Ethylene Glycol) with Ca++ ions.
3. Culture of protoplast:
Protoplast viability is tested with Fluorescein diacetate – before culture.
MS – Medium – used – (with some modifications) droplet, plating or Micro drop array technique.
a. Incubation: done in continuous light (1000 – 2000 lux) at 25°C.
The cell wall formation occurs within (24-48 hrs).
The first division of new cells occurs between 2-7 days of culture.
4. Selection of somatic hybrid cells:
The fusion product of protoplasts without a nucleus of different cells – (cybrid)
Cybrid is also known as Somatic hybrid the process is known as somatic hybridization

• It deals with the application of knowledge, techniques & equipment with strict guidelines in biological laboratories & related industries,
• to prevent large scale loss of
• biological integrity
• ecology
• human health aspects
• to minimize human error and technical flaws & failures which contribute to unnecessary.
• exposures & disposal of – pathogenic microbes & hazardous chemicals, to regularise, risk management assessment and to set in best safeguard measures as per need.

ELSI is an acronym that stands for Ethical, Legal, and Social Implications. It refers to the complex set of considerations that arise from advancements in biotechnology and other scientific fields. Modern biotechnological applications, such as the development of transgenic plants in agriculture, gene therapy in the pharmaceutical industry, and sophisticated medical treatments, have profound impacts that extend beyond the purely scientific. These advancements often raise controversies, challenge deeply held social beliefs, create new legal dilemmas, and sometimes conflict with established ecological principles or moral values. Bioethics, therefore, is the discipline that addresses these concerns. It involves the systematic study of the ethical dimensions of life sciences and healthcare, encompassing ethical questions that arise in medicine, nursing, public health, and biology. Bioethics aims to provide a framework for regulating and guiding the responsible application of modern biotechnological tools and manipulations, ensuring they are used for the welfare of humanity, as well as for the benefit of other plant and animal communities within our global ecosystem.

• Pathogenicity – of living organisms & viruses natural or genetically modified to infect i) humans, ii) animals, iii) plants causing diseases
• Toxicity of allergy – associated with microbial production.
• Antibiotic-Resistant Microbes – increasing in number day by day.
• Disposal problem – regard to spent microbial biomass & purification of effluents.
• Safety aspects – regard to – i) contamination, ii) infection, iii) mutant strains
• regard to industrial use of microorganisms containing invitro recombinants.

Several organizations play key roles in implementing and monitoring biosafety guidelines to ensure the responsible use of biotechnology, particularly concerning genetically modified organisms (GMOs). At the institutional level, Institutional Biosafety Committees (IBSCs) are responsible for overseeing and approving research activities involving GMOs within their respective organizations, ensuring compliance with national regulations. The Review Committee on Genetic Manipulation (RCGM), functioning under the Department of Biotechnology (DBT), has a broader mandate to monitor high-risk research activities conducted in laboratories across the country. For the commercialization and large-scale deployment of GMOs, the Genetic Engineering Approval Committee (GEAC), operating under the Ministry of Environment and Forests, holds significant authority. The GEAC is empowered to grant approvals for the environmental release of GMOs, including conducting open field trials of transgenic crops, and the use of GMOs in industrial products and healthcare applications, ensuring that potential risks are assessed and managed.