Seed dormancy - plant growth substances, Biology

Seed Dormancy - Plant Growth Substances

Seed dormancy is critically important for the survival of plants. Factors involved in seed dormancy are:

A. Environmental Factors

  1. Light requirement for germination-positive or negative
  2. High or low temperatures
  3. Absence of water

B. Internal Factors

  1. Seed coat-prevention of gas exchange
  2. Seed coat-mechanical effects
  3. Embryo immaturity
  4. Low ethylene concentration
  5. Presence of inhibitors
  6. Absence of growth promoters.

C. Timing Mechanism

  1. After-ripening
  2. Disappearance of inhibitors
  3. Synthesis of growth promoters
Posted Date: 1/24/2013 2:20:03 AM | Location : United States

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