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Flower movement induced by weather-dependent tropism satisfies attraction and protection

Author

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  • Akari Shibata

    (Kyoto University
    Fukui City Museum of Natural History)

  • Genki Yumoto

    (Kyoto University)

  • Hanako Shimizu

    (Kyoto University)

  • Mie N. Honjo

    (Kyoto University)

  • Hiroshi Kudoh

    (Kyoto University)

Abstract

Flowers have antagonistic demands for reproductive success, that is, pollinator attraction and flower protection. However, how flowers accommodate these antagonistic reproductive demands has not been thoroughly analysed. In this study, we elucidate the mechanisms and adaptive significance of weather-driven flower movement in Arabidopsis halleri. The auxin-based elongation of flower pedicels causes the change in flower orientation. Combinations of the circadian clock and light conditions activate either phototropism of the flower pedicels to make flowers upward-facing in the sun or gravitropism to make flowers downward-facing in the rain. The upward- and downward-facing flowers enhance pollinator attraction in the sun and flower protection in the rain, respectively, and both responses are required to increase reproductive success. The present study demonstrates that the weather-dependent tropism of flower pedicels functions to satisfy antagonistic reproductive demands under changing weather conditions.

Suggested Citation

  • Akari Shibata & Genki Yumoto & Hanako Shimizu & Mie N. Honjo & Hiroshi Kudoh, 2025. "Flower movement induced by weather-dependent tropism satisfies attraction and protection," Nature Communications, Nature, vol. 16(1), pages 1-13, December.
    • Handle: RePEc:nat:natcom:v:16:y:2025:i:1:d:10.1038_s41467-025-59337-6
    DOI: 10.1038/s41467-025-59337-6
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