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A voltage-dependent chloride channel fine-tunes photosynthesis in plants

Author

Listed:
  • Andrei Herdean

    (University of Gothenburg)

  • Enrico Teardo

    (University of Padova)

  • Anders K. Nilsson

    (University of Gothenburg)

  • Bernard E. Pfeil

    (University of Gothenburg)

  • Oskar N. Johansson

    (University of Gothenburg)

  • Renáta Ünnep

    (Laboratory for Neutron Scattering and Imaging, Paul Scherrer Institute
    Institute for Solid State Physics and Optics, Wigner Research Centre for Physics, Hungarian Academy of Sciences)

  • Gergely Nagy

    (Laboratory for Neutron Scattering and Imaging, Paul Scherrer Institute
    Institute for Solid State Physics and Optics, Wigner Research Centre for Physics, Hungarian Academy of Sciences)

  • Ottó Zsiros

    (Institute of Plant Biology, Biological Research Center, Hungarian Academy of Sciences)

  • Somnath Dana

    (University of Gothenburg)

  • Katalin Solymosi

    (Eötvös Loránd University)

  • Győző Garab

    (Institute of Plant Biology, Biological Research Center, Hungarian Academy of Sciences)

  • Ildikó Szabó

    (University of Padova
    CNR Neuroscience Institute)

  • Cornelia Spetea

    (University of Gothenburg)

  • Björn Lundin

    (University of Gothenburg)

Abstract

In natural habitats, plants frequently experience rapid changes in the intensity of sunlight. To cope with these changes and maximize growth, plants adjust photosynthetic light utilization in electron transport and photoprotective mechanisms. This involves a proton motive force (PMF) across the thylakoid membrane, postulated to be affected by unknown anion (Cl−) channels. Here we report that a bestrophin-like protein from Arabidopsis thaliana functions as a voltage-dependent Cl− channel in electrophysiological experiments. AtVCCN1 localizes to the thylakoid membrane, and fine-tunes PMF by anion influx into the lumen during illumination, adjusting electron transport and the photoprotective mechanisms. The activity of AtVCCN1 accelerates the activation of photoprotective mechanisms on sudden shifts to high light. Our results reveal that AtVCCN1, a member of a conserved anion channel family, acts as an early component in the rapid adjustment of photosynthesis in variable light environments.

Suggested Citation

  • Andrei Herdean & Enrico Teardo & Anders K. Nilsson & Bernard E. Pfeil & Oskar N. Johansson & Renáta Ünnep & Gergely Nagy & Ottó Zsiros & Somnath Dana & Katalin Solymosi & Győző Garab & Ildikó Szabó & , 2016. "A voltage-dependent chloride channel fine-tunes photosynthesis in plants," Nature Communications, Nature, vol. 7(1), pages 1-11, September.
    • Handle: RePEc:nat:natcom:v:7:y:2016:i:1:d:10.1038_ncomms11654
    DOI: 10.1038/ncomms11654
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