Q10 / 180 · AIIMS 2019 (26 May) · Botany

Which hormone inhibits morphogenesis?

Correct answer
A
ABA
B
$2,4-\mathrm{D}$
C
Jasmonic acid
D
IBA

Solution

Abscisic acid is a mildly acidic dextrorotatory cis sesquiterpene growth hormone which functions as a general growth inhibitor by counteracting other hormones (auxin, gibberellins, cytokinins) or reactions mediated by them. Abscisic acid is known as dormin as it induces dormancy in buds, underground stems and seeds.

Hence, the correct answer is option: 'A'.

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