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

It takes very long time for pineapple plants to produce flowers. Which combination of hormones can be applied to artificially induce flowering in pineapple plants throughout the year to increase yield ?

1. Auxin and Ethylene

2. Gibberellin and Cytokinin

3. Gibberellin and Abscisic acid

4. Cytokinin and Abscisic acid

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Answer: 1. Auxin and Ethylene

Key idea: Auxin and ethylene induce flowering in pineapple.

Auxins (like NAA) and ethylene (ethephon) promote flowering and synchronise fruit set in pineapple, so they can be sprayed to bring flowering throughout the year. Gibberellin promotes bolting and elongation, while cytokinin and ABA do not induce flowering in pineapple.

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

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It takes very long time for pineapple plants to produce flowers. Which combination of hormones can be applied to artificially induce flowering in pineapple plants throughout the year to increase yield ?

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