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

第一作者： Yu, Mingzhou

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

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

期刊名称：JOURNAL OF INTEGRATIVE PLANT BIOLOGY （ 影响因子：7.061； 五年影响因子：6.002 ）

ISSN： 1672-9072

年卷期： 2021 年 63 卷 5 期

页码：

收录情况： SCI

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.

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