The Plant Pathology Journal

The Korean Society of Plant Pathology (한국식물병리학회)
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Induced Systemic Drought and Salt Tolerance by Pseudomonas chlororaphis O6 Root Colonization is Mediated by ABA-independent Stomatal Closure

  • Cho, Song-Mi (Department of Floriculture, Chunnam Techno College) ;
  • Kang, Beom-Ryong (Environment-Friendly Agricultural Research Institute, Jeollanamdo Agricultural Research and Extension Services) ;
  • Kim, Jeong-Jun (Agricultural Microbiology Team, National Academy of Agricultural Science, Rural Development Administration) ;
  • Kim, Young-Cheol (Institute of Environmentally-Friendly Agriculture, Department of Plant Biotechnology, Chonnam National University)
  • Received : 2011.11.13
  • Accepted : 2012.01.11
  • Published : 2012.06.01
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Abstract

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 ABA-independent 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.

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References

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