Saturday, November 3, 2018

03-11-2018- II B,SC BOTANY SYLLABYS

II  B. Sc - SEMESTER- IV THEORY: BOTANY SYLLABUS 

     PAPER – DSC IIB: Plant Physiology and Metabolism

            Total hours of teaching 60 hrs @ 4 hrs per week

 UNIT – I: Plant – Water relations                                                                                        (12 hrs)

1.  Physical properties of water, Importance of water to plant life.

2.  Diffusion, imbibition and osmosis; concept & components of water potential.
3.  Absorption and transport of water and ascent of sap.

            4. Transpiration –Definition, types of transpiration, structure and mechanism of
                opening and closing of stomata.

UNIT –II: Mineral nutrition & Enzymes                                                                                (12hrs)

1.      Mineral Nutrition: Essential elements (macro and micronutrients) and their role in plant metabolism, deficiency symptoms.

2.  Mineral ion uptake (active and passive transport).

3.    Nitrogen metabolism- biological nitrogen fixation in Rhizobium, Outlines of protein synthesis (transcription and translation).

4.  Enzymes: Definition, General characteristics, mechanism of enzyme action and
factors regulating enzyme action.

UNIT –III: PHOTOSYNTHESIS                                                                                             (12 hrs)

1.  Photosynthesis: Photosynthetic pigments, photosynthetic light reactions, photo-

phosphorylation, carbon assimilation pathways: C3, C4, and CAM (brief account)
2.  Photorespiration and its significance.

3.  Translocation of organic solutes: mechanism of phloem transport, source-sink relationships.

UNIT – IV: PLANT METABOLISM                                                                                     (12 hrs)

1.      Respiration: Definition, Types of respiration, Glycolysis, anaerobic respiration, TCA cycle, electron transport system. Mechanism of oxidative phosphorylation.

2.      Lipid Metabolism: Types of lipids, Beta-oxidation.

UNIT –V: GROWTH AND DEVELOPMENT                                                                       (12hrs)

1.    Growth and development: definition, phases and kinetics of growth.

2.  Physiological effects of phytohormones - Auxins, Gibberellins, Cytokinins, ABA, Ethylene and Brassinosteroids.

3.      Physiology of flowering - photoperiodism, role of phytochrome in flowering; Vernalization.

4.  Physiology of Senescence and Ageing.

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