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Nitrogen nutrition contributes to plant fertility by affecting meiosis initiation.


ABSTRACT: Nitrogen (N), one of the most important plant nutrients, plays crucial roles in multiple plant developmental processes. Spikelets are the primary sink tissues during reproductive growth, and N deficiency can cause floral abortion. However, the roles of N nutrition in meiosis, the crucial step in plant sexual reproduction, are poorly understood. Here, we identified an N-dependent meiotic entrance mutant with loss of function of ELECTRON TRANSFER FLAVOPROTEIN SUBUNIT β (ETFβ) in rice (Oryza sativa). etfβ displayed meiosis initiation defects, excessive accumulation of branched-chain amino acids (BCAAs) and decrease in total N contents in spikelets under N starvation, which were rescued by applying excess exogenous inorganic N. Under N starvation, ETFβ, through its involvement in BCAA catabolism, promotes N reutilization and contributes to meeting N demands of spikelets, highlighting the impact of N nutrition on meiosis initiation. We conclude that N nutrition contributes to plant fertility by affecting meiosis initiation.

SUBMITTER: Yang H 

PROVIDER: S-EPMC8789853 | biostudies-literature | 2022 Jan

REPOSITORIES: biostudies-literature

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Nitrogen nutrition contributes to plant fertility by affecting meiosis initiation.

Yang Han H   Li Yafei Y   Cao Yiwei Y   Shi Wenqing W   Xie En E   Mu Na N   Du Guijie G   Shen Yi Y   Tang Ding D   Cheng Zhukuan Z  

Nature communications 20220125 1


Nitrogen (N), one of the most important plant nutrients, plays crucial roles in multiple plant developmental processes. Spikelets are the primary sink tissues during reproductive growth, and N deficiency can cause floral abortion. However, the roles of N nutrition in meiosis, the crucial step in plant sexual reproduction, are poorly understood. Here, we identified an N-dependent meiotic entrance mutant with loss of function of ELECTRON TRANSFER FLAVOPROTEIN SUBUNIT β (ETFβ) in rice (Oryza sativa  ...[more]

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