文献类型： 外文期刊
作者： Xu, Kai 1 ; Li, Ning 1 ; Zhang, Yiwen 1 ; Gao, Shenghua 1 ; Yin, Yanxu 1 ; Yao, Minghua 1 ; Wang, Fei 1 ;
作者机构： 1.Hubei Acad Agr Sci, Inst Ind Crops, Hubei Key Lab Vegetable Germplasm Innovat & Genet, Wuhan 430070, Peoples R China
关键词： pepper; CaFtsH1; CaFtsH8; chloroplast development; virus-induced gene silencing
期刊名称：INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES （ 2022影响因子：5.6； 五年影响因子：6.2 ）
年卷期： 2023 年 24 卷 5 期
收录情况： SCI
摘要： Filamentation temperature-sensitive H (FtsH) is a proteolytic enzyme that plays an important role in plant photomorphogenesis and stress resistance. However, information regarding the FtsH family genes in pepper is limited. In our research, through genome-wide identification, 18 members of the pepper FtsH family (including five FtsHi members) were identified and renamed based on phylogenetic analysis. CaFtsH1 and CaFtsH8 were found to be essential for pepper chloroplast development and photosynthesis because FtsH5 and FtsH2 were lost in Solanaceae diploids. We found that the CaFtsH1 and CaFtsH8 proteins were located in the chloroplasts and specifically expressed in pepper green tissues. Meanwhile, CaFtsH1 and CaFtsH8-silenced plants created by virus-induced gene silencing exhibited albino leaf phenotypes. In addition, CaFtsH1-silenced plants were observed to contain very few dysplastic chloroplasts and lost the capacity for photoautotrophic growth. Transcriptome analysis revealed that the expression of chloroplast-related genes such as those coding the photosynthesis-antenna protein and structural proteins was downregulated in CaFtsH1-silenced plants, resulting in the inability to form normal chloroplasts. This study improves our understanding of pepper chloroplast formation and photosynthesis through the identification and functional study of CaFtsH genes.
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