Defence responses of Arabidopsis thaliana to infection by Pseudomonas syringae are regulated by the circadian clock.

ABSTRACT: The circadian clock allows plants to anticipate predictable daily changes in abiotic stimuli, such as light; however, whether the clock similarly allows plants to anticipate interactions with other organisms is unknown. Here we show that Arabidopsis thaliana (Arabidopsis) has circadian clock-mediated variation in resistance to the virulent bacterial pathogen Pseudomonas syringae pv. tomato DC3000 (Pst DC3000), with plants being least susceptible to infection in the subjective morning. We suggest that the increased resistance to Pst DC3000 observed in the morning in Col-0 plants results from clock-mediated modulation of pathogen associated molecular pattern (PAMP)-triggered immunity. Analysis of publicly available microarray data revealed that a large number of Arabidopsis defence-related g

SUBMITTER: Bhardwaj V 

PROVIDER: S-EPMC3205005 | biostudies-literature | 2011

REPOSITORIES: biostudies-literature