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Review article - Peer-reviewed, 2021

The physiological functionality of PGR5/PGRL1-dependent cyclic electron transport in sustaining photosynthesis

Liu, Yifei; Bai, Chunming; Yang, Yunhong; Sun, Zhiyu; Zhang, Siwei; Han, Xiaori; Yong, Jean W.H

Abstract

The cyclic electron transport (CET), after the linear electron transport (LET), is another important electron transport pathway during the light reactions of photosynthesis. The proton gradient regulation 5 (PGR5)/PRG5-like photosynthetic phenotype 1 (PGRL1) and the NADH dehydrogenase-like complex pathways are linked to the CET. Recently, the regulation of CET around photosystem I (PSI) has been recognized as crucial for photosynthesis and plant growth. Here, we summarized the main biochemical processes of the PGR5/PGRL1-dependent CET pathway and its physiological significance in protecting the photosystem II and PSI, ATP/NADPH ratio maintenance, and regulating the transitions between LET and CET in order to optimize photosynthesis when encountering unfavorable conditions. A better understanding of the PGR5/PGRL1- mediated CET during photosynthesis might provide novel strategies for improving crop yield in a world facing more extreme weather events with multiple stresses affecting the plants.

Keywords

photosynthesis; cyclic electron transport; proton gradient regulation 5; PRG5-like photosynthetic phenotype 1; photoinhibition

Published in

Frontiers in Plant Science
2021, Volume: 12, article number: 702196

    Sustainable Development Goals

    SDG13 Climate action
    SDG2 Zero hunger

    UKÄ Subject classification

    Biochemistry and Molecular Biology
    Botany
    Horticulture

    Publication identifier

    DOI: https://doi.org/10.3389/fpls.2021.702196

    Permanent link to this page (URI)

    https://res.slu.se/id/publ/112704