A G-type lectin receptor kinase negatively regulates Arabidopsis immunity against root-knot nematodes
文献类型： 外文期刊
作者： Zhou, Dongmei 1 ; Godinez-Vidal, Damaris 1 ; He, Jiangman 1 ; Teixeira, Marcella 1 ; Guo, Jingzhe 3 ; Wei, Lihui 2 ; Van Norman, Jaimie M. 3 ; Kaloshian, Isgouhi 1 ;
作者机构： 1.Univ Calif Riverside, Dept Nematol, Riverside, CA 92521 USA
2.Jiangsu Acad Agr Sci, Inst Plant Protect, Key Lab Food Qual & Safety Jiangsu Prov, Nanjing 210014, Peoples R China
3.Univ Calif Riverside, Inst Integrat Genome Biol, Ctr Plant Cell Biol, Riverside, CA 92521 USA
4.Univ Calif Riverside, Dept Bot & Plant Sci, Riverside, CA 92521 USA
期刊名称：PLANT PHYSIOLOGY （ 影响因子：7.4； 五年影响因子：8.7 ）
ISSN： 0032-0889
年卷期： 2023 年
页码：
收录情况： SCI
摘要： Root-knot nematodes (Meloidogyne spp., RKN) are responsible for extensive crop losses worldwide. During infection, they penetrate plant roots, migrate between plant cells, and establish feeding sites, known as giant cells, near the root vasculature. Previously, we found that nematode perception and early responses in plants were similar to those of microbial pathogens and required the BRI1-ASSOCIATED KINASE1/SOMATIC EMBRYOGENESIS RECEPTOR KINASE3 (BAK1/SERK3) coreceptor in Arabidopsis (Arabidopsis thaliana) and tomato (Solanum lycopersicum). Here, we implemented a reverse genetic screen for resistance or sensitivity to RKN using Arabidopsis T-DNA alleles of genes encoding transmembrane receptor-like kinases to identify additional receptors involved in this process. This screen identified a pair of allelic mutations with enhanced resistance to RKN in a gene we named ENHANCED RESISTANCE TO NEMATODES1 (ERN1). ERN1 encodes a G-type lectin receptor kinase (G-LecRK) with a single-pass transmembrane domain. Further characterization showed that ern1 mutants displayed stronger activation of MAP kinases, elevated levels of the defense marker MYB51, and enhanced H2O2 accumulation in roots upon RKN elicitor treatments. Elevated MYB51 expression and ROS bursts were also observed in leaves of ern1 mutants upon flg22 treatment. Complementation of ern1.1 with 35S- or native promoter-driven ERN1 rescued the RKN infection and enhanced defense phenotypes. Our results indicate that ERN1 is an important negative regulator of immunity. A plasma membrane-localized G-lectin receptor kinase acts as a negative immune regulator by interfering with defense responses activated by nematode and microbial elicitors.
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