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Zhou D, Godinez-Vidal D, He J, Teixeira M, Guo J, Wei L, Van Norman JM, Kaloshian I. A G-type lectin receptor kinase negatively regulates Arabidopsis immunity against root-knot nematodes. Plant Physiol 2023; 193:721-735. [PMID: 37103588 PMCID: PMC10469371 DOI: 10.1093/plphys/kiad253] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/01/2022] [Revised: 12/22/2022] [Accepted: 12/22/2022] [Indexed: 06/19/2023]
Abstract
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.
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Affiliation(s)
- Dongmei Zhou
- Department of Nematology, University of California Riverside, Riverside, CA 92521, USA
- Institute of Plant Protection, Jiangsu Academy of Agricultural Sciences, Key Lab of Food Quality and Safety of Jiangsu Province, Nanjing 210014, China
| | - Damaris Godinez-Vidal
- Department of Nematology, University of California Riverside, Riverside, CA 92521, USA
| | - Jiangman He
- Department of Nematology, University of California Riverside, Riverside, CA 92521, USA
| | - Marcella Teixeira
- Department of Nematology, University of California Riverside, Riverside, CA 92521, USA
| | - Jingzhe Guo
- Center for Plant Cell Biology, Institute for Integrative Genome Biology, University of California Riverside, Riverside, CA 92521, USA
| | - Lihui Wei
- Institute of Plant Protection, Jiangsu Academy of Agricultural Sciences, Key Lab of Food Quality and Safety of Jiangsu Province, Nanjing 210014, China
| | - Jaimie M Van Norman
- Center for Plant Cell Biology, Institute for Integrative Genome Biology, University of California Riverside, Riverside, CA 92521, USA
- Department of Botany and Plant Sciences, University of California Riverside, Riverside, CA 92521, USA
| | - Isgouhi Kaloshian
- Department of Nematology, University of California Riverside, Riverside, CA 92521, USA
- Center for Plant Cell Biology, Institute for Integrative Genome Biology, University of California Riverside, Riverside, CA 92521, USA
- Department of Botany and Plant Sciences, University of California Riverside, Riverside, CA 92521, USA
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