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Flavodiiron-mediated O2 photoreduction at photosystem I acceptor-side provides photoprotection to conifer thylakoids in early spring

Author

Listed:
  • Pushan Bag

    (Umeå University
    University of Oxford)

  • Tatyana Shutova

    (Umeå University)

  • Dmitry Shevela

    (Umeå University)

  • Jenna Lihavainen

    (Umeå University)

  • Sanchali Nanda

    (Umeå University)

  • Alexander G. Ivanov

    (University of Western Ontario
    Bulgarian Academy of Sciences)

  • Johannes Messinger

    (Umeå University
    Uppsala University)

  • Stefan Jansson

    (Umeå University)

Abstract

Green organisms evolve oxygen (O2) via photosynthesis and consume it by respiration. Generally, net O2 consumption only becomes dominant when photosynthesis is suppressed at night. Here, we show that green thylakoid membranes of Scots pine (Pinus sylvestris L) and Norway spruce (Picea abies) needles display strong O2 consumption even in the presence of light when extremely low temperatures coincide with high solar irradiation during early spring (ES). By employing different electron transport chain inhibitors, we show that this unusual light-induced O2 consumption occurs around photosystem (PS) I and correlates with higher abundance of flavodiiron (Flv) A protein in ES thylakoids. With P700 absorption changes, we demonstrate that electron scavenging from the acceptor-side of PSI via O2 photoreduction is a major alternative pathway in ES. This photoprotection mechanism in vascular plants indicates that conifers have developed an adaptative evolution trajectory for growing in harsh environments.

Suggested Citation

  • Pushan Bag & Tatyana Shutova & Dmitry Shevela & Jenna Lihavainen & Sanchali Nanda & Alexander G. Ivanov & Johannes Messinger & Stefan Jansson, 2023. "Flavodiiron-mediated O2 photoreduction at photosystem I acceptor-side provides photoprotection to conifer thylakoids in early spring," Nature Communications, Nature, vol. 14(1), pages 1-13, December.
    • Handle: RePEc:nat:natcom:v:14:y:2023:i:1:d:10.1038_s41467-023-38938-z
    DOI: 10.1038/s41467-023-38938-z
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    References listed on IDEAS

    as
    1. Qi Yang & Nicolás E. Blanco & Carmen Hermida-Carrera & Nóra Lehotai & Vaughan Hurry & Åsa Strand, 2020. "Two dominant boreal conifers use contrasting mechanisms to reactivate photosynthesis in the spring," Nature Communications, Nature, vol. 11(1), pages 1-12, December.
    2. Pushan Bag & Volha Chukhutsina & Zishan Zhang & Suman Paul & Alexander G. Ivanov & Tatyana Shutova & Roberta Croce & Alfred R. Holzwarth & Stefan Jansson, 2020. "Direct energy transfer from photosystem II to photosystem I confers winter sustainability in Scots Pine," Nature Communications, Nature, vol. 11(1), pages 1-13, December.
    3. Jan Kern & Ruchira Chatterjee & Iris D. Young & Franklin D. Fuller & Louise Lassalle & Mohamed Ibrahim & Sheraz Gul & Thomas Fransson & Aaron S. Brewster & Roberto Alonso-Mori & Rana Hussein & Miao Zh, 2018. "Structures of the intermediates of Kok’s photosynthetic water oxidation clock," Nature, Nature, vol. 563(7731), pages 421-425, November.
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