数字农科院2.0

Rice FLOURY ENDOSPERM 18 encodes a pentatricopeptide repeat protein required for 5′ processing of mitochondrial nad5 messenger RNA and endosperm development

文献类型： 外文期刊

作者： Yu Mingzhou;Wu Mingming;Ren Yulong;Wang Yihua;Li Jingfang;Lei Cailin;Sun Yinglun;Bao Xiuhao;Wu Hongming;Yang Hang;Pan Tian;Wang Yongfei;Jing Ruonan;Yan Mengyuan;Zhang Houda;Zhao Lei;Zhao Zhichao;Zhang Xin;Guo Xiuping;Cheng Zhijun;Yang Bing;Jiang Ling;Wan Jianmin

作者机构：

关键词： 5′ end processing; aleurone layer; endosperm development; mitochondria; nad5; PPR

期刊名称： Journal of Integrative Plant Biology

ISSN： 1672-9072

年卷期： 2021 年 63 卷 5 期

页码：

收录情况： JCR（2021版） ; CSCD（2020-2021年度） ; 科技核心（2020版）

摘要： Pentatricopeptide repeat (PPR) proteins, composing one of the largest protein families in plants, are involved in RNA binding and regulation of organelle RNA metabolism at the post-transcriptional level. Although several PPR proteins have been implicated in endosperm development in rice (Oryza sativa), the molecular functions of many PPRs remain obscure. Here, we identified a rice endosperm mutant named floury endosperm 18 (flo18) with pleiotropic defects in both reproductive and vegetative development. Map-based cloning and complementation tests showed that FLO18 encodes a mitochondrion-targeted P-type PPR protein with 15 PPR motifs. Mitochondrial function was disrupted in the flo18 mutant, as evidenced by decreased assembly of Complex I in the mitochondrial electron transport chain and altered mitochondrial morphology. Loss of FLO18 function resulted in defective 5′-end processing of mitochondrial nad5 transcripts encoding subunit 5 of nicotinamide adenine dinucleotide hydrogenase. These results suggested that FLO18 is involved in 5′-end processing of nad5 messenger RNA and plays an important role in mitochondrial function and endosperm development. © 2020 Institute of Botany, Chinese Academy of Sciences

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