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प्रश्न
Give the chemical features of abscisic acid.
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उत्तर
The chemical features of Abscisic acid are:
- It promotes abscission of leaves and induces dormancy in many plants.
- It controls the dormancy in buds and seeds by inhibiting growth processes.
- It accelerates the senescence of leaves, flowers and fruits.
- It inhibits and delays cell division and cell elongation and suppresses cambium activity by inhibiting mitosis in vascular cambium.
- ABA could cause the efflux of K+ ions from the guard cells and result in the closure of stomata. So, it is known as an antitranspirant.
- It acts as a stress hormone by inducing the plant to bear adverse environmental conditions.
- It inhibits flowering in long-day plants but stimulates flowering in short-day plants.
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संबंधित प्रश्न
Most of the plant hormones promote plant growth. A plant hormone which inhibits growth is ______.
______ causes cell elongation, apical dominance and prevents abscission.
Adverse environmental condition results in production of ______ in plants.
Which phytohormone can be categorised as stress hormone?
The substance that triggers the fall of mature leaves and fruits from plants is due to
Bud dormancy is induced by ______.
Name the plant hormone which is responsible for the following effect:
Falling of leaves
Identify the growth hormone in plants which causes inhibitory effect.
______ is also called as "stress hormone''.
The abscissic acid acts as antitranspirant in plants by the following processes EXCEPТ ______.
