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Hormone responsible for senescence : -
A
ABA
B
Auxin
C
GA
D
Cytokinin
Detailed Solution
Abscisic acid (ABA) is a growth inhibitor. It promotes senescence (ageing) of leaves and other organs, and abscission (shedding) of leaves, flowers and fruits.
Cytokinins have the opposite effect: they delay senescence (Richmond–Lang effect). Auxins and gibberellins also generally delay it.
So the hormone responsible for senescence is ABA.
Cytokinins have the opposite effect: they delay senescence (Richmond–Lang effect). Auxins and gibberellins also generally delay it.
So the hormone responsible for senescence is ABA.