Short Answer Type
Long Answer TypeShort Answer TypeLong Answer TypeAbscisic acid is known as the stress hormone because of the following reasons :
1. It helps plant to cope with adverse environmental conditions or stresses.
2. It causes temporary closure of stomata due to which there is reduction in the rate of transpiration. Therefore, it acts as antitranspirant and reduces water loss.
3. It acts as a general growth inhibtor and inhibitor of plant metabolism
4. It inhibits seed germination.
5. It induces dormancy to escape the unfavourable conditions.
Short Answer TypeLong Answer Type
One Word AnswersWhich one of the plant growth regulators would you use if you are asked to :
(a) Induce rooting in a twig
(b) quickly ripen a fruit
(c) delay leaf senescence
(d) induce growth in axilliary buds
(e) ‘bolt’ a rosestte plant.
(f) induce immediate stomatal closure in leaves.
Switch
