UNIT 1.........................................................7
Introduction to Plant Physiology, Diffusion, Osmosis, Imbibition
1.1 Definition, scope and importance of plant physiology
1.2 Diffusion: Definition, mechanism of diffusion with suitable example, Diffusion Pressure, Graham’s law of diffusion, significance of diffusion
1.3 Osmosis - Introduction, definition, mechanism of osmosis with suitable osmometer. Osmotic pressure,turgor pressure and wall pressure, DPD and its relation with OP, TP, and WP. Types ofsolutions: Hypotonic, Hypertonic and Isotonic solution, Types of Osmosis: Exosmosisand Endosmosis, Significance of osmosis, Plasmolysis, de-plasmolysis
1.4 Imbibition - Definition, mechanism, Imbibition pressure. Importance of Imbibition
UNIT 2................................................................31
Absorption of water and Ascent of Sap
2.1 Absorption of water - 2.1.1: Importance of water 2.1.2: Mechanism of water absorption.
2.2 Ascent of Sap - 2.2.1: Introduction and definition 2.2.2: Theories of ascent sap
UNIT 3..................................................................55 Transpiration
3.1 Definition and types of transpiration
3.2 Structure of stomata
3.3 Mechanism of opening and closing of stomata
3.4 Theories of stomatal opening and closing - a. Steward’s Theory b. K+ pump theory
3.5 Factors affecting rate of transpiration
3.6 Significance of transpiration