IBPS AFO 2026 6–8% weightage

Plant Physiology Notes for IBPS AFO

Photosynthesis, respiration, transpiration, mineral nutrition, plant water relations, seed germination, dormancy, plant growth regulators (auxins, gibberellins, cytokinins)

Keywords: plant physiology notes, photosynthesis, plant growth regulators, transpiration, seed germination

16 Lessons in Plant Physiology

👶

Plant Physiology & Water Relations — The Science of How Plants Work

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Introduction to plant physiology, photosynthesis basics, functions of water in plants, and the three key questions of water relations with exam-focused tables

🧖🏼

Movement of Water — Diffusion, Osmosis, and Absorption

Diffusion, osmosis, osmotic pressure, water potential, DPD, imbibition, plasmolysis, active vs passive absorption, ascent of sap theories, and transpiration with comparison tables and exam tips

🟢

Stomata — Structure, Classification, and Mechanism of Opening and Closing

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Stomatal distribution, types of transpiration, mechanisms of stomatal movement including K+ transport and ABA, guttation and bleeding with comparison tables and exam mnemonics

🎨

Photosynthetic Pigments — Chlorophyll, Carotenoids, Phycobilins, and Anthocyanins

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History of photosynthesis discoveries, chlorophyll a vs b, carotene, xanthophyll, phycobilins, anthocyanin, light and dark reactions overview, and Leaf Area Index with comparison tables

💡

Light Reactions — Photophosphorylation, Photosystems, and Emerson's Effect

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Cyclic and non-cyclic photophosphorylation, PS I and PS II, electron transport chain, Emerson's enhancement effect, and products of light reactions with comparison tables

🌚

Dark Reactions — Calvin Cycle, C4 Pathway, CAM, and Photorespiration

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Calvin cycle (C3), Hatch-Slack cycle (C4), Crassulacean Acid Metabolism (CAM), photorespiration, Blackman's Law of Limiting Factors, and C3 vs C4 comparison with exam tables

🔥

Respiration — The Energy Engine of Every Living Cell

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Definition of respiration, aerobic vs anaerobic types, respiratory substrates, energy output, and the amphibolic nature of respiration with comparison tables and exam mnemonics

🌞

Mechanism of Respiration — Glycolysis, Link Reaction, Krebs Cycle, and ETS

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EMP pathway (glycolysis), pyruvate fate, fermentation, link reaction, Krebs cycle, electron transport system, and ATP accounting with step-by-step tables and exam tips

🌧

Respiratory Quotient (RQ): Formula, Values and Exam Applications

Answer-first Respiratory Quotient notes: RQ formula, values for carbohydrates, fats, proteins, organic acids and anaerobic respiration, with Ganong's respirometer and seed-storage examples.

☄️

Enzymes — Meaning, Characteristics, Types, and Mode of Action

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Enzyme discovery, characteristics, Michaelis-Menten constant, active and allosteric sites, classification by structure and function, and enzyme nomenclature with exam-focused tables

🤚🏻

Factors Affecting Enzyme Activity and Enzyme Inhibitors

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Effects of substrate concentration, temperature, pH, and hydration on enzyme activity, competitive vs non-competitive inhibition, feedback inhibition, and practical applications

📈

Plant Growth — Definition, Measurement, Phases, and Growth Rates

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Definition of growth, primary vs secondary growth, methods of measurement, crescograph, phases of growth, arithmetic vs geometric growth curves, and development with exam tables

🎄

Plant Growth Hormones — Auxins, Gibberellins, Cytokinins, ABA, and Ethylene

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Discovery, physiological effects, and agricultural applications of the five major plant hormones — auxins, gibberellins, cytokinins, abscisic acid, and ethylene with comparison tables

🌻

Photoperiodism and Vernalisation — How Day Length and Temperature Control Flowering

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Short day, long day, and day neutral plants, phytochrome system, night break experiments, vernalisation, and kharif vs rabi crop classification with comparison tables and exam mnemonics

📖

Practice Test 1 — Plant Physiology

Revision quiz covering water relations, osmosis, stomata, transpiration, photosynthetic pigments, and light reactions.

📖

Practice Test 2 — Plant Physiology

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Revision quiz covering dark reactions, respiration, respiratory quotient, enzymes, plant growth, plant hormones, and flowering physiology.

Unlock Full Plant Physiology for IBPS AFO

Pro gives you complete notes for all IBPS AFO subjects, AI-powered MCQ practice, doubt solving, spaced repetition, and mock interview prep — everything you need to crack IBPS AFO.

Frequently Asked Questions

What is the Plant Physiology syllabus for IBPS AFO?

Plant Physiology for IBPS AFO covers: Photosynthesis, respiration, transpiration, mineral nutrition, plant water relations, seed germination, dormancy, plant growth regulators (auxins, gibberellins, cytokinins). It typically accounts for 6–8% of the Professional Knowledge/Technical paper. AgriDots provides free structured notes covering the complete IBPS AFO Plant Physiology syllabus.

How many questions come from Plant Physiology in IBPS AFO?

Plant Physiology contributes approximately 6–8% of the IBPS AFO agriculture/technical paper. Focusing on this subject with structured notes and MCQ practice is key to scoring well.

What are the important topics in Plant Physiology for IBPS AFO?

Key topics: Photosynthesis, respiration, transpiration, mineral nutrition, plant water relations, seed germination, dormancy, plant growth regulators (auxins, gibberellins, cytokinins). Previous year papers show recurring questions on fundamental concepts. AgriDots Plant Physiology notes are structured topic-by-topic with MCQs mapped to IBPS AFO previous year papers.

Are AgriDots Plant Physiology notes free for IBPS AFO preparation?

Yes — AgriDots provides free Plant Physiology notes covering the full IBPS AFO syllabus. Basic notes are free for all users. Pro subscribers get access to advanced notes, AI-generated quizzes, doubt solving, and spaced repetition for Plant Physiology.

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