MPH1 is a thylakoid membrane protein involved in protecting photosystem II from photodamage in land plants

Plant Signaling & Behavior
Jun Liu, Robert L Last

Abstract

Photosystem II (PSII) is highly susceptible to photoinhibition caused by environmental stimuli such as high light; therefore plants have evolved multifaceted mechanisms to efficiently protect PSII from photodamage. We previously published data suggesting that Maintenance of PSII under High light 1 (MPH1, encoded by AT5G07020), a PSII-associated proline-rich protein found in land plants, participates in the maintenance of normal PSII activity under photoinhibitory stress. Here we provide additional evidence for the role of MPH1 in protecting PSII against photooxidative damage. Two Arabidopsis thaliana mutants lacking a functional MPH1 gene suffer from severe photoinhibition relative to the wild-type plants under high irradiance light. The mph1 mutants exhibit significantly decreased PSII quantum yield and electron transport rate after exposure to photoinhibitory light. The mutants also display drastically elevated photodamage to PSII reaction center proteins after high-light treatment. These data add further evidence that MPH1 is involved in PSII photoprotection in Arabidopsis. MPH1 homologs are found across phylogenetically diverse land plants but are not detected in algae or prokaryotes. Taken together, these results suggest t...Continue Reading

References

Feb 1, 2007·Plant, Cell & Environment·Fei YuSteven Rodermel
Jul 12, 2008·Photosynthesis Research·Paula MuloEva-Mari Aro
Mar 27, 2010·Annals of Botany·Peter J NixonJosef Komenda
Nov 6, 2010·Trends in Plant Science·Shunichi Takahashi, Murray R Badger
May 17, 2011·Biochimica Et Biophysica Acta·Alexander V RubanChristopher D P Duffy
Jun 8, 2011·Biochimica Et Biophysica Acta·Wei ChiLixin Zhang
Mar 6, 2012·Current Opinion in Plant Biology·Josef KomendaPeter J Nixon
Feb 19, 2013·Photosynthesis Research·Cristina PaglianoJames Barber
Mar 5, 2013·Annual Review of Plant Biology·Jörg Nickelsen, Birgit Rengstl
Apr 8, 2015·The Plant Journal : for Cell and Molecular Biology·Jun Liu, Robert L Last

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Citations

Aug 6, 2016·Plant Signaling & Behavior·Jasmine Theis, Michael Schroda
Sep 7, 2017·Proceedings of the National Academy of Sciences of the United States of America·Jun Liu, Robert L Last
Aug 17, 2019·Frontiers in Plant Science·Jun LiuRobert L Last
Sep 9, 2020·Nature Communications·Xinchao WangYajun Yang

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