Influence of humidity on bacterial virulence and plant immunity
作者单位：Shanghai Institute of Plant Physiology and EcologyChinese Academy of Sciences Center of Excellence for Plant and Microbial Sciences(CEPAMS)Chinese Academy of Sciences-John Innes Center
会议名称：《2018全国植物生物学大会》
会议日期：2018年
学科分类：09[农学] 0904[农学-植物保护] 090401[农学-植物病理学]
关 键 词：bacterial pathogenesis plant immunity humidity type III effectors
摘 要：Despite tremendous efforts in breeding and pesticide input,plant diseases caused by pathogenic microbes represent one of the most important threats to global food *** important reason is that we are far from understanding the basic disease susceptibility mechanisms and the molecular basis of the influences of environmental conditions,such as humidity and temperature,on plant *** the Arabidopsis thaliana-Pseudomonas syringae pathosystem,we discovered that bacterial pathogens such as *** drive the formation of water soaking in the leaf intercellular space(apoplast) of infected plants as a key virulence *** pathogen exploits type III effector proteins such as HopM1 and AvrE to create an aqueous apoplast,which provides a conducive environment for aggressive multiplication of the bacterial ***, water soaking formation was found to require high humidity,an environmental condition that is long-known to promote numerous plant diseases in the field,thereby providing a critical insight into the humidity effect on pathogen ***,we recently found that high humidity also significantly affects plant immune signalingsuch as salicylic acid(SA) and jasmonic acid(JA) pathways,in both Arabidopsis and rice *** suggests that high humidity promotes infection not only by facilitating bacterial virulence(i.e. water soaking formation) but also by affecting plant immunity ***,our research begins to gain molecular insight into an important,but historically understudied aspect of the multi-dimensional plant-pathogen-environment interactions.