文献类型： 外文期刊
第一作者： Yan, Yan
作者： Yan, Yan;Wang, Meng-Lu;Guo, Yue-Ting;Ding, Ci-Hang;Niu, Ke-Xin;Li, Xiao-Ming;Ni, Zhongfu;Sun, Qixin;Gou, Jin-Ying;Yan, Yan;Wang, Meng-Lu;Guo, Yue-Ting;Ding, Ci-Hang;Niu, Ke-Xin;Li, Xiao-Ming;Ni, Zhongfu;Sun, Qixin;Gou, Jin-Ying;Yan, Yan;Sun, Congwei;Dong, Zhongdong;Cui, Dangqun;Chen, Feng;Guo, Yue-Ting;Ding, Ci-Hang;Niu, Ke-Xin;Li, Xiao-Ming;Gou, Jin-Ying;Rasheed, Awais;Hao, Chenyang;Zhang, Xueyong;Guo, Ganggang
作者机构：
关键词： wheat; CO2 assimilation rate; Heat Shock Protein 90; actin; kernel weight
期刊名称：PLANT BIOTECHNOLOGY JOURNAL （ 影响因子：13.8； 五年影响因子：13.2 ）
ISSN： 1467-7644
年卷期： 2023 年 21 卷 6 期
页码：
收录情况： SCI
摘要： Wheat fixes CO2 by photosynthesis into kernels to nourish humankind. Improving the photosynthesis rate is a major driving force in assimilating atmospheric CO2 and guaranteeing food supply for human beings. Strategies for achieving the above goal need to be improved. Here, we report the cloning and mechanism of CO2 ASSIMILATION RATE AND KERNEL-ENHANCED 1 (CAKE1) from durum wheat (Triticum turgidum L. var. durum). The cake1 mutant displayed a lower photosynthesis rate with smaller grains. Genetic studies identified CAKE1 as HSP90.2-B, encoding cytosolic molecular chaperone folding nascent preproteins. The disturbance of HSP90.2 decreased leaf photosynthesis rate, kernel weight (KW) and yield. Nevertheless, HSP90.2 over-expression increased KW. HSP90.2 recruited and was essential for the chloroplast localization of nuclear-encoded photosynthesis units, for example PsbO. Actin microfilaments docked on the chloroplast surface interacted with HSP90.2 as a subcellular track towards chloroplasts. A natural variation in the hexaploid wheat HSP90.2-B promoter increased its transcription activity, enhanced photosynthesis rate and improved KW and yield. Our study illustrated an HSP90.2-Actin complex sorting client preproteins towards chloroplasts to promote CO2 assimilation and crop production. The beneficial haplotype of Hsp90.2 is rare in modern varieties and could be an excellent molecular switch promoting photosynthesis rate to increase yield in future elite wheat varieties.
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