Genome-wide Dissection of Co-selected UV-B Responsive Pathways in the UV-B Adaptation of Qingke

文献类型： 外文期刊

第一作者： Zeng, Xingquan

作者： Zeng, Xingquan;Yuan, Hongjun;Xu, Qijun;Wang, Yulin;Zha, Sang;Wei, Zexiu;Qimei, Wangmu;Basang, Yuzhen;Dunzhu, Jiabu;Nyima, Tashi;Zeng, Xingquan;Yuan, Hongjun;Xu, Qijun;Wang, Yulin;Zha, Sang;Qimei, Wangmu;Basang, Yuzhen;Dunzhu, Jiabu;Zeng, Xingquan;Yuan, Hongjun;Xu, Qijun;Wang, Yulin;Zha, Sang;Wei, Zexiu;Qimei, Wangmu;Basang, Yuzhen;Dunzhu, Jiabu;Nyima, Tashi;Dong, Xuekui;Tang, Tang;Gao, Meng;Li, Congzhi;Shu, Chujin;Shi, Jian;Dong, Xuekui;Peng, Meng;Jing, Xinyu;Zheng, Zhigang;Yu, Sibin;Luo, Jie;Dong, Xuekui;Peng, Meng;Jing, Xinyu;Zheng, Zhigang;Yu, Sibin;Luo, Jie;Peng, Meng;Wei, Zexiu;Li, Zeqing;Bai, Lijun;Fernie, Alisdair R.;Luo, Jie

作者机构：

关键词： Tibetan hulless barley; UV-B radiation; constitutive and induced accumulation; phenylpropanoid; MYB transcription factor

期刊名称：MOLECULAR PLANT （ 影响因子：13.164； 五年影响因子：16.357 ）

ISSN： 1674-2052

年卷期： 2020 年 13 卷 1 期

页码：

收录情况： SCI

摘要： Qingke (Tibetan hulless barley) has long been cultivated and exposed to long-term and strong UV-B radiation on the Tibetan Plateau, which renders it an ideal species for elucidating novel UV-B responsive mechanisms in plants. Here we report a comprehensive metabolite profiling and metabolite-based genome-wide association study (mGWAS) using 196 diverse qingke and barley accessions. Our results demonstrated both constitutive and induced accumulation, and common genetic regulation, of metabolites from different branches of the phenylpropanoid pathway that are involved in UV-B protection. A total of 90 significant mGWAS loci for these metabolites were identified in barley-qingke differentiation regions, and a number of high-level metabolite trait alleles were found to be significantly enriched in qingke, suggesting co-selection of various phenylpropanoids. Upon dissecting the entire phenylpropanoid pathway, we identified some key determinants controlling natural variation of phenylpropanoid content, including three novel proteins, a flavone C-pentosyltransferase, a tyramine hydroxycinnamoyl acyltransferase, and a MYB transcription factor. Our study, furthermore, demonstrated co-selection of both constitutive and induced phenylpropanoids for UV-B protection in qingke.

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