Question:
ABA is involved in
ABA is involved in
Updated On: Jul 5, 2022
- shoot elongation
- increased cell division
- dormancy of seed
- root elongation'
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The Correct Option is C
Solution and Explanation
Abscisic acid $(ABA)$ is a growth inhibitor, which is involved in seed dormancy. Dormant seeds germinate when $A B A$ is overcome by gibberellins. $ABA$ cause dormancy in axillary buds and acts as stress hormone in adverse environmental conditions.
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Concepts Used:
Seed
The matured and fertilized ovule, which comprises an active embryo reserve food and protective coating, is referred to as a seed. Seeds are ripened ovules that contain an embryonic plant with sufficient reserve food for embryo development. Ovules evolve into seeds after fertilization.
Types of Seed:
- Monocotyledonous seeds: Seeds having only one cotyledon, called monocotyledonous seeds.
- Dicotyledonous seeds: Seeds with two cotyledons, called dicotyledonous seeds.
- Albuminous seeds: Seeds having an endosperm. These seeds have thin membrane cotyledons and endosperm that hold on and feed the seedling during its early growth.
- Exalbuminous seeds: Food gathers in the endosperm tissue of exalbuminous seeds early in development, but it is utilized by the growing embryo and mature seeds without endosperm.