( BOTANY ) PLANT PHYSIOLOGY HARYANA B.Sc Third Semester

Unit

Topics

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Hours

I

Plant Water Relations: Absorption, water potential and transpiration; Role of micro and macro nutrients. Photosynthesis, Respiration.

11

II

Biosynthesis, mechanism of action and uses of auxin, gibberellin, cytokinin, abscisic acid, ethylene, Lipid metabolism and Nitrogen metabolism.

11

III

Structure, function and mechanisms of action of phytochromes; Stomatal movement; Photoperiodism and biological clocks; Mechanism of flowering.

12

IV

Concepts of plant growth; Factors affecting germination and dormancy of seeds; Physiological and biochemical changes associated with senescence and abscission.

11

V*

· Demonstration of imbibition by plaster of Paris method.

· Demonstration of osmosis by potato osmoscope method.

· To study the osmotic pressure of onion scale/ Rhoeo leaf peel by plasmolytic method.

· To separate photosynthetic pigments by thin layer/paper chromatography.

· To study the phenomenon of seed germination (effect of light).

· To study the induction of amylase activity in germinating barley grains.

· To demonstrate suction due to transpiration.

· Determination of glucose by Benedict’s solution.

· To study the process of etiolation in the laboratory.

· To study the action of ethylene hormone on fruit ripening.

30