Plant Pathol J > Volume 28(2); 2012 > Article
The Plant Pathology Journal 2012;28(2):202-206.
DOI:    Published online June 30, 2012.
Induced Systemic Drought and Salt Tolerance by Pseudomonas chlororaphis O6 Root Colonization is Mediated by ABA-independent Stomatal Closure
Song Mi Cho, Beom Ryong Kang, Jeong Jun Kim, Young Cheol Kim
Root colonization by the rhizobacterium Pseudomonas chlororaphis O6 in Arabidopsis thaliana Col-0 plants resulted in induced tolerance to drought and salinity caused by halide salt-generated ionic stress but not by osmotic stress caused by sorbitol. Stomatal apertures decreased following root colonization by P. chlororaphis O6 in both wild-type and ABA-insensitive Arabidopsis mutant plants. These results suggest that an ABAindependent stomatal closure mechanism in the guard cells of P. chlororaphis O6-colonized plants could be a key phenotype for induced systemic tolerance to drought and salt stress.
Key Words: abiotic stress, induced tolerance to environmental stress, priming, stomatal closure

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