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Free Content Nematode CLE signaling in Arabidopsis requires CLAVATA2 and CORYNE

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Plant-parasitic cyst nematodes secrete CLAVATA3 (CLV3)/ESR (CLE)-like effector proteins. These proteins have been shown to act as ligand mimics of plant CLE peptides and are required for successful nematode infection; however, the receptors for nematode CLE-like peptides have not been identified. Here we demonstrate that CLV2 and CORYNE (CRN), members of the receptor kinase family, are required for nematode CLE signaling. Exogenous peptide assays and overexpression of nematode CLEs in Arabidopsis demonstrated that CLV2 and CRN are required for perception of nematode CLEs. In addition, promoter–reporter assays showed that both receptors are expressed in nematode-induced syncytia. Lastly, infection assays with receptor mutants revealed a decrease in both nematode infection and syncytium size. Taken together, our results indicate that perception of nematode CLEs by CLV2 and CRN is not only required for successful nematode infection but is also involved in the formation and/or maintenance of nematode-induced syncytia.
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Keywords: CLAVATA2; CLE peptide; CORYNE; nematode; receptor; syncytium

Document Type: Research Article

Affiliations: 1: Division of Plant Sciences and Bond Life Sciences Center, University of Missouri, Columbia, MO 65211, USA 2: Institut für Genetik, Heinrich-Heine Universität, Düsseldorf, 40225 Düsseldorf, Germany 3: Department of Plant Pathology, University of Georgia, Athens, GA 30602, USA 4: Department of Plant Pathology, Iowa State University, Ames, IA 50011, USA 5: Department of Biological Sciences, Graduate School of Science, University of Tokyo, Hongo 7-3-1, Bunkyo-ku, Tokyo 113-0033, Japan 6: Department of Plant Pathology, North Carolina State University, Raleigh, NC 27695, USA 7: USDA-ARS, Robert W. Holley Center for Agriculture and Health and Department of Plant Pathology and Plant–Microbe Biology, Cornell University, Ithaca, NY 14853, USA

Publication date: February 1, 2011

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