Question

Write a note on physiology of seed germination.

Answer 1

Physiology of Seed Germination:

All the viable seeds which have overcome dormancy (if any) either naturally or artifi­cially will readily germinate under suitable environmental conditions necessary for seed germination i.e., water, O2, temperature and in some cases light. Such seeds which just wait for suitable environmental conditions to germinate are said to be ‘quiescent’.

In most cases these seeds germinate if placed on moist substrate. The process of seed germination starts with the imbibition of water by seed coats and emergence of growing root tip of embryo. It ends when the embryo has developed into a seedling which is out of bounds of seed coats and has its own photosynthetic system. Before describing the physiological and biochemical changes accompanying the seed germina­tion, it is better to evaluate the physiological state of seed immediately before germination.

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