N6-methyladenosine RNA modification regulates photosynthesis during photodamage in plants

Man Zhang, Yunping Zeng, Rong Peng, Jie Dong, Yelin Lan, Sujuan Duan, Zhenyi Chang, Jian Ren, Guanzheng Luo, Bing Liu, Kamil Růžička, Kewei Zhao, Hong-Bin Wang () and Hong-Lei Jin ()
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Man Zhang: Guangzhou University of Chinese Medicine
Yunping Zeng: Guangzhou University of Chinese Medicine
Rong Peng: Guangzhou University of Chinese Medicine
Jie Dong: Sun Yat-sen University
Yelin Lan: Sun Yat-sen University
Sujuan Duan: Guangzhou University of Chinese Medicine
Zhenyi Chang: Guangzhou University of Chinese Medicine
Jian Ren: Sun Yat-sen University
Guanzheng Luo: Sun Yat-sen University
Bing Liu: Sun Yat-sen University
Kamil Růžička: Czech Academy of Sciences
Kewei Zhao: The Third Affiliated Hospital of Guangzhou University of Chinese Medicine
Hong-Bin Wang: Guangzhou University of Chinese Medicine
Hong-Lei Jin: Guangzhou University of Chinese Medicine

Nature Communications, 2022, vol. 13, issue 1, 1-19

Abstract: Abstract N6-methyladenosine (m6A) modification of mRNAs affects many biological processes. However, the function of m6A in plant photosynthesis remains unknown. Here, we demonstrate that m6A modification is crucial for photosynthesis during photodamage caused by high light stress in plants. The m6A modification levels of numerous photosynthesis-related transcripts are changed after high light stress. We determine that the Arabidopsis m6A writer VIRILIZER (VIR) positively regulates photosynthesis, as its genetic inactivation drastically lowers photosynthetic activity and photosystem protein abundance under high light conditions. The m6A levels of numerous photosynthesis-related transcripts decrease in vir mutants, extensively reducing their transcript and translation levels, as revealed by multi-omics analyses. We demonstrate that VIR associates with the transcripts of genes encoding proteins with functions related to photoprotection (such as HHL1, MPH1, and STN8) and their regulatory proteins (such as regulators of transcript stability and translation), promoting their m6A modification and maintaining their stability and translation efficiency. This study thus reveals an important mechanism for m6A-dependent maintenance of photosynthetic efficiency in plants under high light stress conditions.

Date: 2022
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DOI: 10.1038/s41467-022-35146-z

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