文献类型： 外文期刊

作者： Guo, Guanghao ¹ ; Bai, Kaihong ³ ; Hou, Yikun ¹ ; Gong, Zhen ⁵ ; Zhang, Huaizhi ¹ ; Wu, Qiuhong ⁶ ; Lu, Ping ¹ ; Li, Miaomiao ¹ ; Dong, Lingli ¹ ; Xie, Jingzhong ¹ ; Chen, Yongxing ⁶ ; Zhang, Panpan ⁷ ; Zhu, Keyu ¹ ; Li, Beibei ¹ ; Li, Wenling ⁶ ; Dong, Lei ¹ ; Yang, Yijun ¹ ; Qiu, Dan ¹ ; Wang, Gaojie ¹ ; Ahn, Hee-Kyung ² ; Zhao, He ² ; Yuan, Chengguo ⁸ ; Shi, Wenqi ⁹ ; Xue, Minfeng ⁹ ; Yang, Lijun ⁹ ; Yu, Dazao ⁹ ; Zhao, Yusheng ¹ ; Chen, Yuhang ¹ ; Li, Hongjie ⁶ ; Hu, Tiezhu ¹⁰ ; Han, Guan-Zhu ⁵ ; Jones, Jonathan D. G. ² ; Liu, Zhiyong ¹ ;

作者机构： 1.Chinese Acad Sci, Inst Genet & Dev Biol, Key Lab Seed Innovat, Beijing, Peoples R China

2.Univ East Anglia, Sainsbury Lab, Norwich, Norfolk, England

3.Zhengzhou Univ, Sch Life Sci, Zhengzhou, Peoples R China

4.Univ Chinese Acad Sci, Coll Adv Agr Sci, Beijing, Peoples R China

5.Nanjing Normal Univ, Coll Life Sci, Nanjing, Jiangsu, Peoples R China

6.Inst Biotechnol, Xianghu Lab, Hangzhou, Zhejiang, Peoples R China

7.Yunnan Acad Agr Sci, Tea Res Inst, Kunming, Yunnan, Peoples R China

8.Hebei Gaoyi Stock Seed Farm, Gaoyi, Hebei, Peoples R China

9.Hubei Acad Agr Sci, Inst Plant Protect & Soil Sci, Wuhan 430064, Peoples R China

10.Henan Inst Sci & Technol, Xinxiang, Henan, Peoples R China

11.Hainan Seed Ind Lab, Sanya, Hainan, Peoples R China

12.Univ Edinburgh, Inst Mol Plant Sci, Sch Biol Sci, Edinburgh, Scotland

关键词： wheat; powdery mildew; NLR pair; hetero-complexes; resistance mechanism

期刊名称：PLANT BIOTECHNOLOGY JOURNAL （ 影响因子：10.5； 五年影响因子：12.4 ）

ISSN： 1467-7644

年卷期： 2025 年 23 卷 4 期

页码：

收录情况： SCI

摘要： Powdery mildew poses a significant threat to global wheat production and most cloned and deployed resistance genes for wheat breeding encode nucleotide-binding and leucine-rich repeat (NLR) immune receptors. Although two genetically linked NLRs function together as an NLR pair have been reported in other species, this phenomenon has been relatively less studied in wheat. Here, we demonstrate that two tightly linked NLR genes, RXL and Pm5e, arranged in a head-to-head orientation, function together as an NLR pair to mediate powdery mildew resistance in wheat. The resistance function of the RXL/Pm5e pair is validated by mutagenesis, gene silencing, and gene-editing assays. Interestingly, both RXL and Pm5e encode atypical NLRs, with RXL possessing a truncated NB-ARC (nucleotide binding adaptor shared by APAF-1, plant R proteins and CED-4) domain and Pm5e featuring an atypical coiled-coil (CC) domain. Notably, RXL and Pm5e lack an integrated domain associated with effector recognition found in all previously reported NLR pairs. Additionally, RXL and Pm5e exhibit a preference for forming hetero-complexes rather than homo-complexes, highlighting their cooperative role in disease resistance. We further show that the CC domain of Pm5e specifically suppresses the hypersensitive response induced by the CC domain of RXL through competitive interaction, revealing regulatory mechanisms within this NLR pair. Our study sheds light on the molecular mechanism underlying RXL/Pm5e-mediated powdery mildew resistance and provides a new example of an NLR pair in wheat disease resistance.