Suppression of plant defense responses by extracellular metabolites from Pseudomonas syringae pv. tabaci in Nicotiana benthamiana.

ABSTRACT:

Background

Pseudomonas syringae pv. tabaci (Pstab) is the causal agent of wildfire disease in tobacco plants. Several pathovars of Pseudomonas syringae produce a phytotoxic extracellular metabolite called coronatine (COR). COR has been shown to suppress plant defense responses. Interestingly, Pstab does not produce COR but still actively suppresses early plant defense responses. It is not clear if Pstab produces any extracellular metabolites that actively suppress early defense during bacterial pathogenesis.

Results

We found that the Pstab extracellular metabolite extracts (Pstab extracts) remarkably suppressed stomatal closure and nonhost hypersensitive response (HR) cell death induced by a nonhost pathogen, P. syringae pv. tomato T1 (Pst T1), in Nicotiana benthamiana. We a

SUBMITTER: Lee S 

PROVIDER: S-EPMC3648423 | biostudies-literature | 2013 Apr

REPOSITORIES: biostudies-literature