PLANT PHYSIOLOGY
PLANT GROWTH
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Germination of seeds
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Cell division
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Delay in senescence
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Abscission
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Detailed explanation-1: -Abscisic acid is a plant growth inhibitor. It does various growth-inhibiting activities like dormancy and abscission.
Detailed explanation-2: -The hormones that suppress plant growth during harsh conditions by causing leaf wilting and seed dormancy are called abscisic acid. It is not associated with plant growth.
Detailed explanation-3: -Gaseous PGR, ethylene, could fit either of the groups. But since it predominantly inhibits growth activities, they can be categorized as growth-inhibiting hormones.
Detailed explanation-4: -Ethylene is a plant growth promoter as well as a plant growth inhibitor. Ethylene is produced by tissues of plants undergoing senescence and ripening of fruits in the form of gas. It helps in the growth of root hairs and elongation of internodes in deep water rice plants. Q.