Topic: Plant growth regulators: auxin, gibberellin, cytokinin, ethylene, ABA· Plant Physiology

Fruit and leaf drop at early stages can be prevented by the application of :

1. Ethylene

2. Auxins

3. Gibberellic acid

4. Cytokinins

Doubtly Asked 30 Oct 2026 NEET UG 2017 Practice test neet Save WhatsApp Report

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Answer: 2. Auxins

Auxins prevent early fruit and leaf drop (abscission) in plants.

Ethylene promotes abscission and ripening, so it does the opposite. Gibberellins promote stem elongation and bolting, and cytokinins promote cell division and delay senescence.

Doubtly AI · 30 Oct 2026 AI-generated · not yet verified Report

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Fruit and leaf drop at early stages can be prevented by the application of :

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