II B. Sc - SEMESTER-
IV THEORY: BOTANY SYLLABUS
PAPER – DSC IIB: Plant Physiology and Metabolism
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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