Abstract
Obligate biotroph powdery mildew is one of the most economically important fungal pathogens. Plants can recognize and reject pathogens at various stages of their attempted colonization on plants. Basal resistance is the first plant defense response against a pathogen infection. It is thought to be triggered by host recognition of pathogen-associated molecular patterns, with subsequent suppression of particular components by pathogen effectors. To identify novel factors of Arabidopsis basal resistance against powdery mildew Golovinomyces orontii, we performed 2-DE analyses on powdery mildew-infected and non-infected leaves. We report here results of LC-MS/MS analysis on spots that specifically identified in infected leaves. Functions of those factors in plant defense response will be discussed.