Identification and characterization of a novel Sclerotinia-MAMP and its receptor in Arabidopsis
C. FEILER (1), W. Zhang (2), A. Gust (3), T. Nuernberger (3), D. Kolb (3) (1) University of Tuebingen, Center for plant molecular biology, Germany; (2) ETH Zurich, Switzerland; (3) University of Tuebingen, Germany

Arabidopsis has evolved a large number of transmembrane cell surface receptors that play major roles during development and responses to external stimuli. Binding of microbial patterns (MAMPs) to these receptors trigger intracellular re-programming leading to restriction of pathogen growth. We have associated one At leucine-rich repeat (LRR) receptor-like protein, RLP30, with a specific function as pattern recognition receptor for a novel elicitor activity, SCFE1 from the fungus Sclerotinia sclerotiorum. SCFE1 promotes typical MAMP-induced defense responses in At, but not in At rlp30-mutant plants, suggesting that RLP30 is the receptor for SCFE1. Moreover, we have identified the two LRR receptor-like kinases (RLK) BAK1 and SOBIR1 as co-receptors of RLP30. SOBIR1 is the adaptor kinase for LRR-RLPs, and these complexes are proposed to be bimolecular equivalents of genuine RLKs, requiring BAK1 for ligand-dependent signaling.

Abstract Number: P17-521
Session Type: Poster