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Q.
Function of $ABA$ is
AFMCAFMC 2010Plant Growth and Development
Solution:
Abscisic acid is a growth hormone which functions as a general growth inhibitor by counteracting other hormones (auxin, gibberellins, cytokinins) or reactions mediated by them. It is also called stress hormone because the production of hormone is stimulated by drought, water logging and other adverse environmental conditions. Abscisic acid is known as dormin as it induces dormancy in buds, underground stems and seeds.