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Theplant cytosolic m^(6)A RNA methylome stabilizes photosynthesis in the cold

Plant Communications 2023年第6期4卷 70-84页

作者： Alexandre Magno Vicente Nikolay Manavski Paul Torben Rohn lisa-marie schmid Antoni Garcia-Molina Dario Leister Charlotte Seydel Leo Bellin Torsten Möhlmann Gregor Ammann Stefanie Kaiser Jörg Meurer Plant Molecular Biology Faculty of BiologyLudwig-Maximilians-University MunichGroßhaderner Street 2-482152 Planegg-MartinsriedGermany Plant Development Faculty of BiologyLudwig-Maximilians-University MunichGroßhaderner Street 2-482152 Planegg-MartinsriedGermany Plant Physiology Faculty of BiologyUniversity of KaiserslauternErwin-Schröodinger-Street767663 KaiserslauternGermany Pharmaceutical Chemistry Goethe University FrankfurtMax-von-Laue-Str.960438 Frankfurt am MainGermany Present address:Loewe Biochemica GmbH Möuhlweg 2a82054 SauerlachGermany Present address:Center for Research in Agricultural Genomics 08193

The sessile lifestyle of plants requires an immediate response to environmental stressors that affect photosynthesis,growth,and crop ***,we showed that three abiotic perturbations—heat,cold,and high light—triggered considerable changes in the expression signatures of 42 epitranscriptomic factors(writers,erasers,and readers)with putative chloroplast-associated functions that formed clusters of commonly expressed genes in *** expression changes under all conditions were reversible upon deacclimation,identifying epitranscriptomic players as modulators in acclimation *** dysfunctions,particularly those induced by the oxidative stress-inducing norflurazon in a largely GENOME UNCOUPLED-independent manner,triggered retrograde signals to remodel chloroplastassociated epitranscriptomic expression patterns.N6-methyladenosine(m^(6)A)is known as the most prevalent RNA modification and impacts numerous developmental and physiological functions in living *** cold treatment,expression of components of the primary nuclear m^(6)A methyltransferase complex was upregulated,accompanied by a significant increase in cellular m^(6)A mRNA *** the cold,the presence of FIP37,a core component of the writer complex,played an important role in positive regulation of thylakoid structure,photosynthetic functions,and accumulation of photosystemⅠ,the Cytb6f complex,cyclic electron transport proteins,and Curvature Thylakoid1 but not that of photosystemⅡcomponents and the chloroplast ATP *** of FIP37 affected abundance,polysomal loading,and translation of cytosolic transcripts related to photosynthesis in the cold,suggesting m^(6)Adependent translational regulation of chloroplast *** summary,we identified multifaceted roles of the cellular m^(6)A RNA methylome in coping with cold;these were predominantly associated with chloroplasts and served to stabilize photosynthesis.

关键词： m^(6)A RNA methylation cold acclimation stress response Arabidopsis thaliana photosynthesis chloroplast

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