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What is seed dormancy ? Which two hormones affects dormancy. 


Seed Dormancy : Seed dormancy is defined as a state in which seeds are prevented from germinating even under environmental conditions normally favorable for germination.  These conditions are a complex combination of water, light, temperature, gasses, mechanical restrictions, seed coats, and hormone structures.

The two hormone affecting the seed dormancy are:

i. 
Ethylene breaks seed and bud dormancy, initiates germination in peanut seeds, sprouting of potato tubers.

ii. Abscissic acid induces see dormancy. 
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Writes notes on following :

(a) Senescence (b) Abscission

(c) Quiescence (d) Vivipary.


List some of the tissues in a woody dicotyledenous plant that are the products of redifferentiation.

What are redifferentiated cells ?

Where natural cytokinins are synthesised ?

First 16 17 18 Last
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