Applications of
Plant Tissue
Culture
Kajal Bharadwaj
MSC. BOTANY 4TH SEM
,Production of Transgenic Plants
Transgenic plants are genetically modified organisms (GMOs) in which foreign genes (transgenes)
are inserted into their genome to express desirable traits.
These plants are widely used in agriculture, medicine, and industry.
The production involves several steps that include gene identification, transfer, and regeneration.
Steps in the Production of Transgenic Plants
1. Gene Identification and Isolation
o The first step involves identifying a gene responsible for a desirable trait (e.g., pest
resistance, drought tolerance).
o This gene is isolated using molecular biology techniques like PCR or restriction
enzyme digestion.
2. Gene Cloning and Vector Construction
o The isolated gene is cloned into a vector, commonly a plasmid.
o Vectors Used: Ti plasmid from Agrobacterium tumefaciens for dicots or viral vectors
for specific applications.
o A selectable marker gene (e.g., antibiotic resistance) is added to facilitate
identification of transformed cells.
3. Gene Transfer Methods
Gene transfer can occur via the following techniques:
o Agrobacterium-mediated Transformation :
Agrobacterium tumefaciens infects plant cells and integrates T-DNA carrying the
desired gene into the plant genome.
, o Particle Bombardment (Biolistics) : DNA-coated microparticles are shot into
plant cells using a gene gun.
o Other Methods : Electroporation, microinjection.
4. Regeneration of Transgenic Plants
o The transformed cells are cultured in nutrient-rich media (e.g., MS medium) with
plant growth regulators like auxins and cytokinins.
o Plants are regenerated through somatic embryogenesis or organogenesis.
o Selective agents (e.g., antibiotics) ensure only transgenic cells grow.
5. Confirmation of Transgenicity
o Molecular Analysis : PCR, Southern blotting (gene integration), and Western
blotting (protein expression).
o Functional Assays : Testing the expressed trait in transgenic plants (e.g., pest
resistance).
Applications of Transgenic Plants
1. Agriculture:
o Pest Resistance : Bt cotton and Bt brinjal produce proteins toxic to pests.
o Herbicide Tolerance : Glyphosate-resistant soybean reduces the need for
mechanical weeding.
o Stress Resistance : Crops engineered to withstand drought, salinity, and extreme
temperatures.
2. Nutritional Enhancement:
o Golden rice enriched with vitamin A to combat malnutrition.
o Iron and zinc biofortification in staple crops.
Plant Tissue
Culture
Kajal Bharadwaj
MSC. BOTANY 4TH SEM
,Production of Transgenic Plants
Transgenic plants are genetically modified organisms (GMOs) in which foreign genes (transgenes)
are inserted into their genome to express desirable traits.
These plants are widely used in agriculture, medicine, and industry.
The production involves several steps that include gene identification, transfer, and regeneration.
Steps in the Production of Transgenic Plants
1. Gene Identification and Isolation
o The first step involves identifying a gene responsible for a desirable trait (e.g., pest
resistance, drought tolerance).
o This gene is isolated using molecular biology techniques like PCR or restriction
enzyme digestion.
2. Gene Cloning and Vector Construction
o The isolated gene is cloned into a vector, commonly a plasmid.
o Vectors Used: Ti plasmid from Agrobacterium tumefaciens for dicots or viral vectors
for specific applications.
o A selectable marker gene (e.g., antibiotic resistance) is added to facilitate
identification of transformed cells.
3. Gene Transfer Methods
Gene transfer can occur via the following techniques:
o Agrobacterium-mediated Transformation :
Agrobacterium tumefaciens infects plant cells and integrates T-DNA carrying the
desired gene into the plant genome.
, o Particle Bombardment (Biolistics) : DNA-coated microparticles are shot into
plant cells using a gene gun.
o Other Methods : Electroporation, microinjection.
4. Regeneration of Transgenic Plants
o The transformed cells are cultured in nutrient-rich media (e.g., MS medium) with
plant growth regulators like auxins and cytokinins.
o Plants are regenerated through somatic embryogenesis or organogenesis.
o Selective agents (e.g., antibiotics) ensure only transgenic cells grow.
5. Confirmation of Transgenicity
o Molecular Analysis : PCR, Southern blotting (gene integration), and Western
blotting (protein expression).
o Functional Assays : Testing the expressed trait in transgenic plants (e.g., pest
resistance).
Applications of Transgenic Plants
1. Agriculture:
o Pest Resistance : Bt cotton and Bt brinjal produce proteins toxic to pests.
o Herbicide Tolerance : Glyphosate-resistant soybean reduces the need for
mechanical weeding.
o Stress Resistance : Crops engineered to withstand drought, salinity, and extreme
temperatures.
2. Nutritional Enhancement:
o Golden rice enriched with vitamin A to combat malnutrition.
o Iron and zinc biofortification in staple crops.
