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Ion antiport accelerates photosynthetic acclimation in fluctuating light environments

Author

Listed:
  • Ute Armbruster

    (Carnegie Institution for Science)

  • L. Ruby Carrillo

    (Plant Research Laboratory, Michigan State University, R106 Plant Biology Building)

  • Kees Venema

    (Dpto de Bioquímica, Biología Celular y Molecular de Plantas, Estación Experimental del Zaidín, Consejo Superior de Investigaciones Científicas)

  • Lazar Pavlovic

    (Biochemie der Pflanzen, Heinrich-Heine-Universität Düsseldorf)

  • Elisabeth Schmidtmann

    (Carnegie Institution for Science)

  • Ari Kornfeld

    (Carnegie Institution for Science)

  • Peter Jahns

    (Biochemie der Pflanzen, Heinrich-Heine-Universität Düsseldorf)

  • Joseph A. Berry

    (Carnegie Institution for Science)

  • David M. Kramer

    (Plant Research Laboratory, Michigan State University, R106 Plant Biology Building)

  • Martin C. Jonikas

    (Carnegie Institution for Science)

Abstract

Many photosynthetic organisms globally, including crops, forests and algae, must grow in environments where the availability of light energy fluctuates dramatically. How photosynthesis maintains high efficiency despite such fluctuations in its energy source remains poorly understood. Here we show that Arabidopsis thaliana K+ efflux antiporter (KEA3) is critical for high photosynthetic efficiency under fluctuating light. On a shift from dark to low light, or high to low light, kea3 mutants show prolonged dissipation of absorbed light energy as heat. KEA3 localizes to the thylakoid membrane, and allows proton efflux from the thylakoid lumen by proton/potassium antiport. KEA3’s activity accelerates the downregulation of pH-dependent energy dissipation after transitions to low light, leading to faster recovery of high photosystem II quantum efficiency and increased CO2 assimilation. Our results reveal a mechanism that increases the efficiency of photosynthesis under fluctuating light.

Suggested Citation

  • Ute Armbruster & L. Ruby Carrillo & Kees Venema & Lazar Pavlovic & Elisabeth Schmidtmann & Ari Kornfeld & Peter Jahns & Joseph A. Berry & David M. Kramer & Martin C. Jonikas, 2014. "Ion antiport accelerates photosynthetic acclimation in fluctuating light environments," Nature Communications, Nature, vol. 5(1), pages 1-8, December.
    • Handle: RePEc:nat:natcom:v:5:y:2014:i:1:d:10.1038_ncomms6439
    DOI: 10.1038/ncomms6439
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    Cited by:

    1. Tatsuya Hagino & Takafumi Kato & Go Kasuya & Kan Kobayashi & Tsukasa Kusakizako & Shin Hamamoto & Tomoaki Sobajima & Yuichiro Fujiwara & Keitaro Yamashita & Hisashi Kawasaki & Andrés D. Maturana & Tom, 2022. "Cryo-EM structures of thylakoid-located voltage-dependent chloride channel VCCN1," Nature Communications, Nature, vol. 13(1), pages 1-10, December.
    2. Thekla von Bismarck & Philipp Wendering & Leonardo Perez de Souza & Jeremy Ruß & Linnéa Strandberg & Elmien Heyneke & Berkley J. Walker & Mark A. Schöttler & Alisdair R. Fernie & Zoran Nikoloski & Ute, 2023. "Growth in fluctuating light buffers plants against photorespiratory perturbations," Nature Communications, Nature, vol. 14(1), pages 1-16, December.
    3. Huan Zhang & Xiaofeng Xiong & Kangning Guo & Mengyuan Zheng & Tianjun Cao & Yuqing Yang & Jiaojiao Song & Jie Cen & Jiahuan Zhang & Yanyou Jiang & Shan Feng & Lijin Tian & Xiaobo Li, 2024. "A rapid aureochrome opto-switch enables diatom acclimation to dynamic light," Nature Communications, Nature, vol. 15(1), pages 1-18, December.
    4. Ashutosh Gulati & Surabhi Kokane & Annemarie Perez-Boerema & Claudia Alleva & Pascal F. Meier & Rei Matsuoka & David Drew, 2024. "Structure and mechanism of the K+/H+ exchanger KefC," Nature Communications, Nature, vol. 15(1), pages 1-14, December.

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