Chapter 38 of 41
Revision Notes
Plant Tissue Culture — Revision Notes
Telangana Open School (TOSS) · Class 12 · Biology
Plant Tissue Culture revision notes for Telangana Open School (TOSS) Class 12 Biology: 4 topics in quick points.
48 questions30 flashcards5 concepts
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Key Topics to Revise
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1. Totipotency
- Totipotency refers to the ability of a single plant cell to divide and differentiate into a complete plant under suitable conditions.
- The term was first coined by Morgan in 1901 to describe regenerative capacity.
- This concept is the foundation of plant tissue culture because any living plant cell can potentially regenerate into a full plant.
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2. Steps in Plant Tissue Culture
- The process involves six main steps: preparation of nutrient medium, sterilization, explant preparation, inoculation, incubation, and acclimatization.
- Each step must be performed under sterile conditions to prevent contamination.
- The success of tissue culture depends on precise control of nutrients, hormones, temperature, and light.
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3. Nutrient Medium and Growth Regulators
- The nutrient medium provides all essential elements for plant growth in vitro.
- MS medium (Murashige and Skoog) is the most commonly used medium.
- It contains macro and micronutrients, vitamins, amino acids, and carbohydrates like sucrose.
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4. Organogenesis and Somatic Embryogenesis
- Organogenesis is the formation of organs (roots or shoots) from callus.
- High auxin : low cytokinin ratio promotes root formation (rhizogenesis).
- Low auxin : high cytokinin ratio promotes shoot formation (caulogenesis).
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Full NotesKey Concepts
Cellular totipotency is the abilityAn artificial mixture containing essential nutrientsAny living part of a plantOrganogenesis is the formation of shootsThe process of gradually adapting lab
Frequently Asked Questions
What are the important topics in Plant Tissue Culture for Telangana Open School (TOSS) Class 12 Biology?
Key topics in Plant Tissue Culture include Totipotency, Steps in Plant Tissue Culture, Nutrient Medium and Growth Regulators, Organogenesis and Somatic Embryogenesis. Study these first, then practise questions on each for the Telangana Open School (TOSS) Class 12 board exam.
How should I revise Plant Tissue Culture for the Telangana Open School (TOSS) Class 12 board exam?
Learn the core ideas first, then work through the 48 practice questions on Plant Tissue Culture. Revise definitions regularly and use flashcards for quick recall before the exam.
Sources & Official References
Content is aligned to the official syllabus. Refer to the board website for the latest curriculum.
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