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Evidence that endosperm turgor pressure both promotes and restricts seed growth and size

Author

Listed:
  • Audrey Creff

    (Université de Lyon, ENS de Lyon, UCB Lyon, CNRS, INRAE, INRIA)

  • Olivier Ali

    (Université de Lyon, ENS de Lyon, UCB Lyon, CNRS, INRAE, INRIA)

  • Camille Bied

    (Université de Lyon, ENS de Lyon, UCB Lyon, CNRS, INRAE, INRIA)

  • Vincent Bayle

    (Université de Lyon, ENS de Lyon, UCB Lyon, CNRS, INRAE, INRIA)

  • Gwyneth Ingram

    (Université de Lyon, ENS de Lyon, UCB Lyon, CNRS, INRAE, INRIA)

  • Benoit Landrein

    (Université de Lyon, ENS de Lyon, UCB Lyon, CNRS, INRAE, INRIA)

Abstract

In plants, as in animals, organ growth depends on mechanical interactions between cells and tissues, and is controlled by both biochemical and mechanical cues. Here, we investigate the control of seed size, a key agronomic trait, by mechanical interactions between two compartments: the endosperm and the testa. By combining experiments with computational modelling, we present evidence that endosperm pressure plays two antagonistic roles: directly driving seed growth, but also indirectly inhibiting it through tension it generates in the surrounding testa, which promotes wall stiffening. We show that our model can recapitulate wild type growth patterns, and is consistent with the small seed phenotype of the haiku2 mutant, and the results of osmotic treatments. Our work suggests that a developmental regulation of endosperm pressure is required to prevent a precocious reduction of seed growth rate induced by force-dependent seed coat stiffening.

Suggested Citation

  • Audrey Creff & Olivier Ali & Camille Bied & Vincent Bayle & Gwyneth Ingram & Benoit Landrein, 2023. "Evidence that endosperm turgor pressure both promotes and restricts seed growth and size," Nature Communications, Nature, vol. 14(1), pages 1-12, December.
  • Handle: RePEc:nat:natcom:v:14:y:2023:i:1:d:10.1038_s41467-022-35542-5
    DOI: 10.1038/s41467-022-35542-5
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    References listed on IDEAS

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    1. Behruz Bozorg & Pawel Krupinski & Henrik Jönsson, 2014. "Stress and Strain Provide Positional and Directional Cues in Development," PLOS Computational Biology, Public Library of Science, vol. 10(1), pages 1-13, January.
    2. Audrey Creff & Lysiane Brocard & Gwyneth Ingram, 2015. "A mechanically sensitive cell layer regulates the physical properties of the Arabidopsis seed coat," Nature Communications, Nature, vol. 6(1), pages 1-8, May.
    3. Chii Jou Chan & Maria Costanzo & Teresa Ruiz-Herrero & Gregor Mönke & Ryan J. Petrie & Martin Bergert & Alba Diz-Muñoz & L. Mahadevan & Takashi Hiiragi, 2019. "Hydraulic control of mammalian embryo size and cell fate," Nature, Nature, vol. 571(7763), pages 112-116, July.
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