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http://dx.doi.org/10.5352/JLS.2011.21.9.1295

Physiological Characterization of an AtPGR from Arabidopsis Involved in Pathogen Resistance  

Chung, Moon-Soo (Department of Plant Biotechnology, Chonnam National University)
Kim, Cheol-Soo (Department of Plant Biotechnology, Chonnam National University)
Publication Information
Journal of Life Science / v.21, no.9, 2011 , pp. 1295-1300 More about this Journal
Abstract
The AtPGR gene is induced by pathogen infection, jasmonic acid and salicylic acid treatment and may therefore play a role in plant defense responses. Arabidopsis thaliana Plasma membrane Glucose-responsive Regulator (AtPGR) was previously isolated from Arabidopsis, which confers glucose insensitivity on plants. To study its biological functions directly, we have characterized both loss-of-function RNAi mutant and gain-of-function transgenic overexpression plants for AtPGR in Arabidopsis. The AtPGR-overexpressing plants displayed enhanced resistance to a virulent strain of the bacterial pathogen Pseudomonas syringae as measured by a significant decrease in both bacterial growth and symptom development as compared to those in wild-type and RNAi plants. The enhanced resistance in the gain-of-function transgenic plants was associated with increased induction of SA-regulated PDF1.2 and JA-regulated PR1 by the bacterial pathogen. Thus, pathogen-induced AtPGR plays a positive role in defense responses to P. syringae.
Keywords
AtPGR; glucose; jasmonic acid; pathogen; salicylic acid;
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