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PP 502 PLANT DEVELOPMENTAL BIOLOGY                                                                                 (3L+1P) I

Objective
  To explain about basic physiological and molecular processes concerning various facets of growth and development of plants.

Theory

UNIT I
  Shoot, leaf and root development – Organization of shoot/root apical meristem

UNIT II
  Floral induction and development – Photoperiodism and its significance; Vernalization and hormonal control; Inflorescence and floral determination; Molecular genetics of floral development and floral organ differentiation

UNIT III
  Senescence and programmed cell death (PCD) – Senescence and its regulation; Hormonal and environmental control of senescence; PCD in the life cycle of plants.

UNIT IV
  Photomorphogenesis, phototropism, photonasty and leaf movement, chlorophyll synthesis, light control of plant development – Discovery of phytochromes and cryptochromes, their structure, biochemical properties and cellular distribution; Molecular mechanisms of light perception, signal transduction and gene regulation; Biological clocks and their genetic and molecular determinants

UNIT V
  Special aspects of plant development and differentiation – Regeneration and totipotency; Organ differentiation and development, Sex determination in plants; Self-incompatibility and its genetic control; Heterosis and apomixis.

Practicals
  Role of light on growth and development. Effect of day length on transition from vegetative to reproductive phases in wheat. Analysing the effect of GA on phenological development. Effect of ABA on growth and development of flowers. Changes in level of pigments under different light conditions. Application of  ver nalization during induction of  f lowering. Impor tance of photoperiodism in agriculture.

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