Natural variation of DROT1 confers drought adaptation in upland rice

Xingming Sun, Haiyan Xiong, Conghui Jiang, Dongmei Zhang, Zengling Yang, Yuanping Huang, Wanbin Zhu, Shuaishuai Ma, Junzhi Duan, Xin Wang, Wei Liu, Haifeng Guo, Gangling Li, Jiawei Qi, Chaobo Liang, Zhanying Zhang, Jinjie Li, Hongliang Zhang, Lujia Han, Yihua Zhou, Youliang Peng and Zichao Li ()
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Xingming Sun: China Agricultural University
Haiyan Xiong: China Agricultural University
Conghui Jiang: China Agricultural University
Dongmei Zhang: Chinese Academy of Sciences
Zengling Yang: China Agricultural University
Yuanping Huang: China Agricultural University
Wanbin Zhu: China Agricultural University
Shuaishuai Ma: China Agricultural University
Junzhi Duan: China Agricultural University
Xin Wang: China Agricultural University
Wei Liu: China Agricultural University
Haifeng Guo: China Agricultural University
Gangling Li: China Agricultural University
Jiawei Qi: China Agricultural University
Chaobo Liang: China Agricultural University
Zhanying Zhang: China Agricultural University
Jinjie Li: China Agricultural University
Hongliang Zhang: China Agricultural University
Lujia Han: China Agricultural University
Yihua Zhou: Chinese Academy of Sciences
Youliang Peng: China Agricultural University
Zichao Li: China Agricultural University

Nature Communications, 2022, vol. 13, issue 1, 1-17

Abstract: Abstract Upland rice is a distinct ecotype that grows in aerobic environments and tolerates drought stress. However, the genetic basis of its drought resistance is unclear. Here, using an integrative approach combining a genome-wide association study with analyses of introgression lines and transcriptomic profiles, we identify a gene, DROUGHT1 (DROT1), encoding a COBRA-like protein that confers drought resistance in rice. DROT1 is specifically expressed in vascular bundles and is directly repressed by ERF3 and activated by ERF71, both drought-responsive transcription factors. DROT1 improves drought resistance by adjusting cell wall structure by increasing cellulose content and maintaining cellulose crystallinity. A C-to-T single-nucleotide variation in the promoter increases DROT1 expression and drought resistance in upland rice. The potential elite haplotype of DROT1 in upland rice could originate in wild rice (O. rufipogon) and may be beneficial for breeding upland rice varieties.

Date: 2022
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DOI: 10.1038/s41467-022-31844-w

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