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Circadian rhythms of hydraulic conductance and growth are enhanced by drought and improve plant performance

Author

Listed:
  • Cecilio F. Caldeira

    (INRA, LEPSE)

  • Linda Jeanguenin

    (Institut des Sciences de la Vie, Université catholique de Louvain)

  • François Chaumont

    (Institut des Sciences de la Vie, Université catholique de Louvain)

  • François Tardieu

    (INRA, LEPSE)

Abstract

Circadian rhythms enable plants to anticipate daily environmental variations, resulting in growth oscillations under continuous light. Because plants daily transpire up to 200% of their water content, their water status oscillates from favourable during the night to unfavourable during the day. We show that rhythmic leaf growth under continuous light is observed in plants that experience large alternations of water status during an entrainment period, but is considerably buffered otherwise. Measurements and computer simulations show that this is due to oscillations of plant hydraulic conductance and plasma membrane aquaporin messenger RNA abundance in roots during continuous light. A simulation model suggests that circadian oscillations of root hydraulic conductance contribute to acclimation to water stress by increasing root water uptake, thereby favouring growth and photosynthesis. They have a negative effect in favourable hydraulic conditions. Climate-driven control of root hydraulic conductance therefore improves plant performances in both stressed and non-stressed conditions.

Suggested Citation

  • Cecilio F. Caldeira & Linda Jeanguenin & François Chaumont & François Tardieu, 2014. "Circadian rhythms of hydraulic conductance and growth are enhanced by drought and improve plant performance," Nature Communications, Nature, vol. 5(1), pages 1-9, December.
    • Handle: RePEc:nat:natcom:v:5:y:2014:i:1:d:10.1038_ncomms6365
    DOI: 10.1038/ncomms6365
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    1. Claude Welcker & Nadir Abusamra Spencer & Olivier Turc & Italo Granato & Romain Chapuis & Delphine Madur & Katia Beauchene & Brigitte Gouesnard & Xavier Draye & Carine Palaffre & Josiane Lorgeou & Ste, 2022. "Physiological adaptive traits are a potential allele reservoir for maize genetic progress under challenging conditions," Nature Communications, Nature, vol. 13(1), pages 1-13, December.
    2. Kang, Jian & Hao, Xinmei & Zhou, Huiping & Ding, Risheng, 2021. "An integrated strategy for improving water use efficiency by understanding physiological mechanisms of crops responding to water deficit: Present and prospect," Agricultural Water Management, Elsevier, vol. 255(C).
    3. Assouline, Shmuel & Hochberg, Uri & Silber, Avner, 2021. "The impact of tree phenology on the response of irrigated avocado: The hysteretic nature of the maximum trunk daily shrinkage," Agricultural Water Management, Elsevier, vol. 256(C).

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