EDS1-Mediated Basal Defense and SA-Signaling Contribute to Post Post-Invasion Resistance against Tobacco Powdery Mildew in Arabidopsis
作者单位：Rice Research InstituteSichuan Agricultural University
会议名称：《中国植物病理学会2015年学术年会》
会议日期：2015年
学科分类：09[农学] 0904[农学-植物保护] 090401[农学-植物病理学] 090402[农学-农业昆虫与害虫防治]
摘 要：Arabidopsh-powdery mildew is a unique pathosystem in dissecting the molecular mechanism of biotrophic fungus-plant *** increase the diversity of powdery mildew pathogens,we identified a tobacco powdery mildew,designated Gc SICAUl,that belonged to Golovinomyces cichoracearum（Gc） based on the internal transcribed spacer（ITS） rDNA fragment *** test in laboratory conditions revealed that Gc SICAUl was able to colonize on wild type Arabidopsis Co1-0 leaves,but failed to grow as abundantly as on tobacco leaves,indicating that Gc SICAUl has overcome the pre- and post-invasion resistance and its colonization is hindered by post postinvasion resistance in *** growth of Gc SICAU1 in the fls2,efr-1 and penl-1 mutants displayed no obvious difference from that of in wild type *** contrast,salicylic acid（SA）-signaling deficient mutants such as pad4-1,npr1-1,and eds5-1,but not Ethylene-signaling mutants,exhibited increased susceptibility to Gc ***,eds1-2 and pad4-1/sid2-1 double mutant were fully susceptible to Gc SICAU1 and the disease symptom was comparable to Gc SICAU1 on tobacco *** data indicate that EDS1-mediated basal defense and SA-signaling play critical roles for post post-invasion resistance against this *** together,our data demonstrated that Gc SICAU1 is a pathogen weakly virulent to Arabidopsis and can be used as a tool to finely dissect post-invasion resistance mechanisms.