INDITTO2 transposon conveys auxin-mediated DRO1 transcription for rice drought avoidance

文献类型： 外文期刊

第一作者： Zhao, Yiting

作者： Zhao, Yiting;Wu, Lixia;Fu, Qijing;Yu, Si;Jiang, Li;Qian, Jie;Zhou, Xuan;Han, Li;Zhao, Shuanglu;Zhang, Yanfang;Luo, Chongyu;Dong, Qian;Li, Saijie;Zhang, Lina;Jiang, Xi;Li, Youchun;Luo, Hao;Li, Kuixiu;Yang, Jing;Luo, Qiong;Peng, Sheng;Huang, Huichuan;Li, Chengyun;He, Xiahong;Du, Yunlong;Zhao, Yiting;Wu, Lixia;Fu, Qijing;Zhou, Xuan;Han, Li;Luo, Chongyu;Li, Kuixiu;Yang, Jing;Luo, Qiong;Peng, Sheng;Huang, Huichuan;Li, Chengyun;He, Xiahong;Du, Yunlong;Zhao, Yiting;Wu, Lixia;Fu, Qijing;Zhou, Xuan;Han, Li;Luo, Chongyu;Li, Kuixiu;Yang, Jing;Luo, Qiong;Peng, Sheng;Huang, Huichuan;Li, Chengyun;He, Xiahong;Du, Yunlong;Friml, Jiri;Ma, Canrong;Wang, Lei;Wang, Dong;Zuo, Zhili;Li, Jing;Yao, Baolin;Liu, Changning;Zhao, Yiting;Li, Lichi

作者机构：

关键词： DNA transposable elements; indoleacetic acid; Oryza; stress

期刊名称：PLANT CELL AND ENVIRONMENT （ 影响因子：7.228； 五年影响因子：7.791 ）

ISSN： 0140-7791

年卷期： 2021 年 44 卷 6 期

页码：

收录情况： SCI

摘要： Transposable elements exist widely throughout plant genomes and play important roles in plant evolution. Auxin is an important regulator that is traditionally associated with root development and drought stress adaptation. The DEEPER ROOTING 1 (DRO1) gene is a key component of rice drought avoidance. Here, we identified a transposon that acts as an autonomous auxin-responsive promoter and its presence at specific genome positions conveys physiological adaptations related to drought avoidance. Rice varieties with a high and auxin-mediated transcription of DRO1 in the root tip show deeper and longer root phenotypes and are thus better adapted to drought. The INDITTO2 transposon contains an auxin response element and displays auxin-responsive promoter activity; it is thus able to convey auxin regulation of transcription to genes in its proximity. In the rice Acuce, which displays DRO1-mediated drought adaptation, the INDITTO2 transposon was found to be inserted at the promoter region of the DRO1 locus. Transgenesis-based insertion of the INDITTO2 transposon into the DRO1 promoter of the non-adapted rice variety Nipponbare was sufficient to promote its drought avoidance. Our data identify an example of how transposons can act as promoters and convey hormonal regulation to nearby loci, improving plant fitness in response to different abiotic stresses.

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