Magnesium chelatase subunit D is not only required for chlorophyll biosynthesis and photosynthesis, but also affecting starch accumulation in Manihot esculenta Crantz
文献类型： 外文期刊
作者： Yang, Xingai 1 ; Cai, Jie 1 ; Xue, Jingjing 1 ; Luo, Xiuqin 1 ; Zhu, Wenli 1 ; Xiao, Xinhui 1 ; Xue, Maofu 1 ; An, Feifei 1 ; Li, Kaimian 1 ; Chen, Songbi 1 ;
作者机构： 1.Chinese Acad Trop Agr Sci, Trop Crops Genet Resources Inst, Key Lab, Minist Agr Germplasm Resources Conservat & Utiliza, Haikou 571101, Peoples R China
关键词： Cassava (Manihot esculenta Crantz); MeChlD; VIGS; Chlorophyll synthesis; Photosynthesis; Starch accumulation
期刊名称：BMC PLANT BIOLOGY （ 影响因子：5.3； 五年影响因子：5.9 ）
ISSN： 1471-2229
年卷期： 2023 年 23 卷 1 期
页码：
收录情况： SCI
摘要： BackgroundMagnesium chelatase plays an important role in photosynthesis, but only a few subunits have been functionally characterized in cassava.ResultsHerein, MeChlD was successfully cloned and characterized. MeChlD encodes a magnesium chelatase subunit D, which has ATPase and vWA conservative domains. MeChlD was highly expressed in the leaves. Subcellular localization suggested that MeChlD:GFP was a chloroplast-localized protein. Furthermore, the yeast two-hybrid system and BiFC analysis indicated that MeChlD interacts with MeChlM and MePrxQ, respectively. VIGS-induce silencing of MeChlD resulted in significantly decreased chlorophyll content and reduction the expression of photosynthesis-related nuclear genes. Furthermore, the storage root numbers, fresh weight and the total starch content in cassava storage roots of VIGS-MeChlD plants was significantly reduced.ConclusionTaken together, MeChlD located at the chloroplast is not only required for chlorophyll biosynthesis and photosynthesis, but also affecting the starch accumulation in cassava. This study expands our understanding of the biological functions of ChlD proteins.
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