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The Arabidopsis endosperm is a temperature-sensing tissue that implements seed thermoinhibition through phyB

Author

Listed:
  • Urszula Piskurewicz

    (University of Geneva)

  • Maria Sentandreu

    (University of Geneva)

  • Mayumi Iwasaki

    (University of Geneva)

  • Gaëtan Glauser

    (Université de Neuchâtel)

  • Luis Lopez-Molina

    (University of Geneva
    University of Geneva)

Abstract

Seed thermoinhibition, the repression of germination under high temperatures, prevents seedling establishment under potentially fatal conditions. Thermoinhibition is relevant for phenology and agriculture, particularly in a warming globe. The temperature sensing mechanisms and signaling pathways sustaining thermoinhibition are unknown. Here we show that thermoinhibition in Arabidopsis thaliana is not autonomously controlled by the embryo but is rather implemented by the endosperm. High temperature is sensed through endospermic phyB by accelerating its reversion from the active signaling Pfr form into the inactive Pr form, as previously described in seedlings. This leads to thermoinhibition mediated by PIFs, mainly PIF1, PIF3 and PIF5. Endospermic PIF3 represses the expression of the endospermic ABA catabolic gene CYP707A1 and promotes endospermic ABA accumulation and release towards the embryo to block its growth. Furthermore, endospermic ABA represses embryonic PIF3 accumulation that would otherwise promote embryonic growth. Hence, under high temperatures PIF3 exerts opposite growth responses in the endosperm and embryo.

Suggested Citation

  • Urszula Piskurewicz & Maria Sentandreu & Mayumi Iwasaki & Gaëtan Glauser & Luis Lopez-Molina, 2023. "The Arabidopsis endosperm is a temperature-sensing tissue that implements seed thermoinhibition through phyB," Nature Communications, Nature, vol. 14(1), pages 1-14, December.
    • Handle: RePEc:nat:natcom:v:14:y:2023:i:1:d:10.1038_s41467-023-36903-4
    DOI: 10.1038/s41467-023-36903-4
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    References listed on IDEAS

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    1. Suhua Feng & Cristina Martinez & Giuliana Gusmaroli & Yu Wang & Junli Zhou & Feng Wang & Liying Chen & Lu Yu & Juan M. Iglesias-Pedraz & Stefan Kircher & Eberhard Schäfer & Xiangdong Fu & Liu-Min Fan , 2008. "Coordinated regulation of Arabidopsis thaliana development by light and gibberellins," Nature, Nature, vol. 451(7177), pages 475-479, January.
    2. Martina Legris & Yetkin Çaka Ince & Christian Fankhauser, 2019. "Molecular mechanisms underlying phytochrome-controlled morphogenesis in plants," Nature Communications, Nature, vol. 10(1), pages 1-15, December.
    3. S. Vinod Kumar & Doris Lucyshyn & Katja E. Jaeger & Enriqueta Alós & Elizabeth Alvey & Nicholas P. Harberd & Philip A. Wigge, 2012. "Transcription factor PIF4 controls the thermosensory activation of flowering," Nature, Nature, vol. 484(7393), pages 242-245, April.
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