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Which of the following events in plants is/are affected by interaction of more than one plant growth regulator?
(a) Dormancy in seeds/buds
(b) Abscission and senescence
(c) Apical dominance

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Only a

Only a, b

Only b, c

a, b, c

answer is D.

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Detailed Solution

Ethylene breaks seed and bud dormancy. Gibberellins can also break seed dormancy and abscisic acid can promote seed dormancy.

Abscisic acid promotes abscission. Cytokinin promote nutrient mobilisation which helps in the delay of leaf senescence.

Auxin promotes apical dominance and cytokinin counteracts apical dominance.

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