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(D) Plant growth regulators (PGRs) are classified into two categories: growth promoters and growth inhibitors.Abscisic acid $(ABA)$ is the primary gro

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Plant responses to wounds and stresses

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(D) Plant growth regulators (PGRs) are classified into two categories: growth promoters and growth inhibitors.Abscisic acid $(ABA)$ is the primary growth inhibitor.Apart from inhibiting growth,$ABA$ plays a crucial role in plant responses to various biotic and abiotic stresses,such as drought,salinity,and wounding.Therefore,it is often referred to as a stress hormone.

Plant growth regulators,which are involved in growth-inhibiting activities,also play an important role in $-$

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