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 Plant Growth and Development

Online Biology Class 

  • Following is the list of topics that are covered during online biology classes for NEET preparation.

  • After completion of all the topics of the chapter, MCQs based on NEET Pattern questions are discussed.

  • Doubts during the class are also cleared. You can also post your doubts and we will promptly answer it.

15.1 Growth

  • Indeterminate growth

  • Measurement of growth

  • Phases of growth

  • Cell division

  • Cell enlargement

  • Cell maturation

  • Demonstration of phases of growth

  • Growth rates

  • Absolute growth rate

  • Relative growth rate

  • Conditions of growth

  • Supply of nutrients

  • C/N Ratio

  • Temperature

  • Water

  • Light

  • Differentiation, dedifferentiation and redifferentiation

  • Development

  • Growth hormones and growth regulators

15.2 Auxins

  • Discovery

  • Types of auxins

  • Natural auxins

  • Synthetic auxins

  • Physiological effects of auxins

  • Cell elongation and longitudinal growth

  • Cell division in the cambium

  • Cell division and tissue culture

  • Vascular tissue differentiation

  • Root growth and root initiation

  • Apical dominance

  • Prevention of absicission layer

  • Parthenocarpy

  • Auxins used as herbicides

  • Enzymatic activity

  • Flower initiation

  • Respiration

  • Plant gwoth movements

  • Other effect

  • Bioassay of auxins(Avena coleoptiles test)

  • Gibberllins

  • Discovery

  • Physiological effects

  • Elongation of stem

  • Reversal of dwarfism

  • Bolting and flowering

  • Substitution the cold treatments

  • Cell division in the cambium

  • Parthenocarpy

  • Seed germination

  • Breading of dormancy

  • De-novo synthesis of hydrolytic enzymes

  • Other effects

  • Bioassay(Lettuce Hypocotyl Test)

15.3 Cytokinins

  • Discovery

  • Zeatin

  • Physiological effects

  • Cell division

  • Cell enlargement

  • Initiation of interfascicular cambium

  • Morphogenesis

  • Counteraction of apical dominance

  • Breaking of dormancy

  • Delay of senescence(Richmond-Lang effect)

  • Accumulation of translocation of solutes

  • Other effects

15.4 Ethylene

  • Physiological effect

  • Inhibitory effect on growth

  • Tropic responses

  • Suppression of bud growth

  • Fruit growth and ripening

  • Abscission

  • Flowering

  • Root initiation

  • Dormancy

  • Leaf bending(epinasty)

  • Senescence

  • Sex expression

  • Negative feedback

15.5 ABA

  • Physiological effects

  • Inhibition of growth

  • Seed development and germination

  • Abscission

  • Geotropism

  • Stomatal closing

  • Role in water stress

  • Senescence

  • Other effects

  • Photoperiodism and flowering

  • Classification of photoperiodic responses

  • Short day plants SDP

  • Long day plants LDP

  • Day neutral plants

  • Characteristics of photoperiodic responses

  • Genetic control

  • Critical day length

  • Inductive cycle

  • Perception of photoperiodic stimulus

  • Role of phytochrome in the flower initiation

  • The flowering stimulus = florigen

  • Vernalisation

  • Site for vernalisation

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