Abscisic Acid And Ethylene
Abscisic Acid And Ethylene
Abscisic acid: Abscisic acid is a growth inhibitor that reverses the growth-promoting effects of auxins and gibberellins. It is also called as antigibberellins. It causes dormancy of seeds, tubers and bulbs. It promotes leaf and fruit fall. It helps in the closure of the stomata to decrease the loss of water or reduce transpiration.
Ethylene : Ethylene is a gaseous hormone that acts at trace levels throughout the life of the plant. It is also known as ripening hormone. Ethylene also induces epinasty, leaf abscission,induces flowering in pine apples and checks the elongation in stem and root. However it promotes rooting like auxin.
Functions of Ethylene:
Which of the following hormone act as both growth promoter and inhibitor ? | |||
| Right Option : B | |||
| View Explanation | |||
Which the following are correct matches : - (i) Auxin - Promote apical growth of plant (ii) Gibbierellins - Accelerate senescence and abscession of leaves. (iii) Ethylene - Promotes stem elongation (iv) ABA - inhibit germination of seeds. | |||
| Right Option : C | |||
| View Explanation | |||
Leaf fall can be prevented by ______________ | |||
| Right Option : C | |||
| View Explanation | |||
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