Atmospheric CO₂ Alters Resistance of Arabidopsis to Pseudomonas syringae by Affecting Abscisic Acid Accumulation and Stomatal Responsiveness to Coronatine.

ABSTRACT: Atmospheric CO₂ influences plant growth and stomatal aperture. Effects of high or low CO₂ levels on plant disease resistance are less well understood. Here, resistance of Arabidopsis thaliana against the foliar pathogen Pseudomonas syringae pv. tomato DC3000 (Pst) was investigated at three different CO₂ levels: high (800 ppm), ambient (450 ppm), and low (150 ppm). Under all conditions tested, infection by Pst resulted in stomatal closure within 1 h after inoculation. However, subsequent stomatal reopening at 4 h, triggered by the virulence factor coronatine (COR), occurred only at ambient and high CO₂, but not at low CO₂. Moreover, infection by Pst was reduced at low CO₂ to the same

SUBMITTER: Zhou Y 

PROVIDER: S-EPMC5432532 | biostudies-literature | 2017

REPOSITORIES: biostudies-literature