MG1 interacts with a protease inhibitor and confers resistance to rice root-knot nematode

Xiaomin Wang, Rui Cheng, Daochao Xu, Renliang Huang, Haoxing Li, Liang Jin, Yufeng Wu, Jiuyou Tang, Changhui Sun, Deliang Peng, Chengcai Chu and Xiaoli Guo ()
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Xiaomin Wang: Huazhong Agricultural University
Rui Cheng: Huazhong Agricultural University
Daochao Xu: Huazhong Agricultural University
Renliang Huang: Jiangxi Academy of Agricultural Sciences
Haoxing Li: Huazhong Agricultural University
Liang Jin: Huazhong Agricultural University
Yufeng Wu: Nanjing Agricultural University
Jiuyou Tang: Chinese Academy of Sciences
Changhui Sun: Sichuan Agricultural University
Deliang Peng: Chinese Academy of Agricultural Sciences
Chengcai Chu: Chinese Academy of Sciences
Xiaoli Guo: Huazhong Agricultural University

Nature Communications, 2023, vol. 14, issue 1, 1-17

Abstract: Abstract The rice root-knot nematode (Meloidogyne graminicola) is one of the most destructive pests threatening rice (Oryza sativa L.) production in Asia; however, no rice resistance genes have been cloned. Here, we demonstrate that M. GRAMINICOLA-RESISTANCE GENE 1 (MG1), an R gene highly expressed at the site of nematode invasion, determines resistance against the nematode in several rice varieties. Introgressing MG1 into susceptible varieties increases resistance comparable to resistant varieties, for which the leucine-rich repeat domain is critical for recognizing root-knot nematode invasion. We also report transcriptome and cytological changes that are correlated with a rapid and robust response during the incompatible interaction that occurs in resistant rice upon nematode invasion. Furthermore, we identified a putative protease inhibitor that directly interacts with MG1 during MG1-mediated resistance. Our findings provide insight into the molecular basis of nematode resistance as well as valuable resources for developing rice varieties with improved nematode resistance.

Date: 2023
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DOI: 10.1038/s41467-023-39080-6

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