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

查看全文 作　　者：Mingzhou [1]Yu;Mingming [1]Wu;Yulong [2]Ren;Yihua [1]Wang;Jingfang [1]Li;Cailin [2]Lei;Yinglun [1]Sun;Xiuhao [1]Bao;Hongming [1]Wu;Hang [1]Yang;Tian [1]Pan;Yongfei [1]Wang;Ruonan [1]Jing;Mengyuan [2]Yan;Houda [2]Zhang;Lei [2]Zhao;Zhichao [2]Zhao;Xin [2]Zhang;Xiuping [2]Guo;Zhijun [2]Cheng;Bing [1]Yang;Ling [1]Jiang;Jianmin [1,2]Wan

机构地区：[1]State Key Laboratory for Crop Genetics and Germplasm Enhancement,Jiangsu Plant Gene Engineering Research Center,Nanjing Agricultural University,Nanjing 210095,China;[2]National Key Facility for Crop Gene Resources and Genetic Improvement,Institute of Crop Sciences,Chinese Academy of Agricultural Sciences,Beijing 100081,China

出　　处：《Journal of Integrative Plant Biology》索引2021年第63卷第5期,共14页

基　　金：This research was supported by grants from the National Transgenic Science and Technology Program(2019ZX08010-003);the Agricultural Science and Technology Innovation Program of CAAS(CAAS-ZDXT2018001);the Fundamental Research Funds for the Central Universities(KYTZ201601);the Postgraduate Research&Practice Innovation Program of Jiangsu Province(KYCX18_0657)。 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 posttranscriptional 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 mitochondriontargeted 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. 关键词：aleurone layer endosperm development MITOCHONDRIA PPR nad5,5′end processing

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

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