Submitted to: National Soybean Cyst Nematode Conference
Publication Type: Proceedings
Publication Acceptance Date: 3/1/2008
Publication Date: 3/6/2008
Citation: Mitchum, M.G., Wang, X., Davis, E.L. 2008. Soybean Cyst Nematode CLAVATA3/ESR-Like (CLE) Peptides: A Cross-Kingdom Adaptation for Plant Parasitism. In: T.L. Niblack (Ed). Proceedings of the 4th National SCN Conference. National Soybean Cyst Nematode Conference, Urbana, IL. p. 29-33.
Technical Abstract: The soybean cyst nematode (SCN), Heterodera glycines, is a sedentary endoparasite of soybean roots that causes extensive annual yield losses. SCN secretes proteins originating in its esophageal gland cells into selected root tissues to form unique and essential feeding cells. Small secreted peptides sharing similarity to the CLAVATA3/ESR (CLE) signaling peptide family of plants have been identified from SCN. Plant CLE peptides play important roles in plant growth and development including maintenance of the stem cell pool in the root meristem. Recent studies provide evidence of a role for SCN CLEs as ligand mimics of plant CLE peptides to developmentally reprogram the fate of root cells for feeding cell formation. Moreover, our data suggest a role for host-specific control of nematode CLE peptide recognition that could explain the specific adaptation of SCN to parasitize a limited number of plant species. Our studies provide novel insight into how nematode signals are perceived by plants to transduce signaling pathways that ultimately give rise to feeding cells within host plant roots. In the long term, we hope to apply our knowledge of the role of nematode CLEs in plant parasitism to devise novel strategies to engineer nematode resistant crop plants.