PthA4^AT , a 7.5-repeats transcription activator-like (TAL) effector from Xanthomonas citri ssp. citri, triggers citrus canker resistance.

ABSTRACT: Transcription activator-like effectors (TALEs) are important effectors of Xanthomonas spp. that manipulate the transcriptome of the host plant, conferring susceptibility or resistance to bacterial infection. Xanthomonas citri ssp. citri variant A^T (X. citri A^T ) triggers a host-specific hypersensitive response (HR) that suppresses citrus canker development. However, the bacterial effector that elicits this process is unknown. In this study, we show that a 7.5-repeat TALE is responsible for triggering the HR. PthA4^AT was identified within the pthA repertoire of X. citri A^T followed by assay of the effects on different hosts. The mode of action of PthA4^AT was characterized using protein-binding microarrays and testing the effects of dele

SUBMITTER: Roeschlin RA 

PROVIDER: S-EPMC6792138 | biostudies-literature | 2019 Oct

REPOSITORIES: biostudies-literature