Suppressing an auxin efflux transporter enhances rice adaptation to temperate habitats

文献类型： 外文期刊

第一作者： Cui, Yanchun

作者： Cui, Yanchun;Huang, Lifang;Liu, Peng;Wang, Xiaodong;Huang, Xuan;Hu, Xiaojie;He, Zhankun;Xia, Yuqi;Li, Zebang;Chen, Caiyan;Mao, Donghai;Wang, Xiaodong;Huang, Xuan;Xia, Yuqi;Li, Zebang;Chen, Caiyan;Mao, Donghai;Wu, Bi;Xing, Yongzhong;Tan, Yongjun;Tang, Wenbang;Hu, Xiaojie;Zhang, Wenli;Mao, Donghai

作者机构：

期刊名称：NATURE COMMUNICATIONS （ 影响因子：15.7； 五年影响因子：17.2 ）

ISSN：

年卷期： 2025 年 16 卷 1 期

页码：

收录情况： SCI

摘要： Rice (Oryza sativa L.), a chilling-sensitive staple crop originating from tropical and subtropical Asia, can be cultivated in temperate regions through the introduction of chilling tolerance traits. However, the molecular mechanisms underlying this adaptation remain largely unknown. Herein, we show that HAN2, a quantitative trait locus, confers chilling tolerance in temperatejaponica rice. HAN2 encodes an auxin efflux transporter (OsABCB5) and negatively regulates chilling tolerance, potentially via auxin-mediated signaling pathway. During rice domestication, HAN2 has undergone selective divergence between the indica and temperatejaponica subspecies. In temperatejaponica rice, the insertion of a Copia long terminal repeat retrotransposon downstream of HAN2 reduces its expression, thereby enhancing chilling tolerance and facilitating adaptation to temperate climates. Introgression of the temperatejaponica HAN2 allele into indica rice significantly improves chilling tolerance at both seedling and booting stages. These findings advance our understanding of rice northward expansion and provide a valuable genetic resource for improving yield stability under chilling stress.

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