Pathogen glycoside hydrolase: a new player in the apoplastic battlefield
Y. WANG (1) (1) Department of Plant Pathology, Nanjing Agricultural University, China

In nature, plants are constantly attacked by a wide variety of pathogens. The apoplast constitutes a major battlefield between plant-pathogen interactions during infection process. Initially, pathogens have to tackle with various chemical and biochemical barriers in plant apoplast. However, the conserved pathogen associated molecular patterns (PAMP) of the invading pathogens could be perceived by host cell surface–localized receptors and thereby to initiate a set of basal defense responses. To achieve successful infection, pathogens developed sophisticated strategies to modulate plant immunity. We recently identified glycoside hydrolase XEG1 from the soybean root rot pathogen Phytophthora sojae as a novel PAMP molecule. Furthermore, XEG1 homologs are widely distributed across microbial taxa and many of them are able to trigger immune response on various plant species. One interesting observation though is that XEG1 is required for pathogenesis in an enzymatic activity dependant manner, suggesting dual roles of XEG1 in apoplast battlefield. In my talk, new data on how XEG1 regulates Phytophthora virulence and plant immunity will be presented.

Abstract Number: P6-4
Session Type: Plenary