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Related Experiment Video

Updated: Jul 12, 2026

Visualizing Cellular Gibberellin Levels Using the nlsGPS1 Förster Resonance Energy Transfer (FRET) Biosensor
08:53

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Published on: January 12, 2019

Gibberellin as Sex Regulator in Ricinus communis.

O Shifriss

    Science (New York, N.Y.)
    |June 30, 1961
    PubMed
    Summary

    Gibberellin A3 application significantly boosts the female sex tendency in monoecious inbreds. This hormonal effect mimics the influence of long-day photoperiods on plant sexual development.

    Area of Science:

    • Plant biology
    • Hormonal regulation
    • Plant reproduction

    Background:

    • Monoecious plants possess both male and female reproductive organs.
    • Environmental factors like photoperiod can influence plant sexual expression.
    • Gibberellins are plant hormones with diverse physiological roles.

    Purpose of the Study:

    • To investigate the effect of gibberellin A3 on the sex determination of monoecious inbred plants.
    • To compare the influence of gibberellin A3 with photoperiod on plant sex expression.

    Main Methods:

    • Monoecious inbred plant lines were treated with gibberellin A3.
    • Sex tendency was assessed following hormone application.
    • The effects were compared to plants exposed to long-day conditions.

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    Main Results:

    • Gibberellin A3 application markedly increased the female tendency in the studied plants.
    • The observed effect of gibberellin A3 on sex expression simulated the impact of long days.

    Conclusions:

    • Gibberellin A3 can be used to manipulate sex expression in monoecious plants.
    • Hormonal pathways and photoperiodic signaling may interact in regulating plant sexual development.