Functional Analysis of Plant Defense Suppression and Activation by the Xanthomonas Core Type III Effector XopX.

ABSTRACT: Many phytopathogenic type III secretion effector proteins (T3Es) have been shown to target and suppress plant immune signaling but perturbation of the plant immune system by T3Es can also elicit a plant response. XopX is a "core" Xanthomonas T3E that contributes to growth and symptom development during Xanthomonas euvesicatoria infection of tomato but its functional role is undefined. We tested the effect of XopX on several aspects of plant immune signaling. XopX promoted ethylene production and plant cell death (PCD) during X. euvesicatoria infection of susceptible tomato and in transient expression assays in Nicotiana benthamiana, which is consistent with its requirement for the development of X. euvesicatoria-induced disease symptoms. Additionally, although XopX suppressed flagellin-ind

SUBMITTER: Stork W 

PROVIDER: S-EPMC4293322 | biostudies-literature | 2015 Feb

REPOSITORIES: biostudies-literature