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KMID : 0613820110210091295
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Journal of Life Science
2011 Volume.21 No. 9 p.1295 ~ p.1300
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Physiological Characterization of an AtPGR from Arabidopsis Involved in Pathogen Resistance
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Chung Moon-Soo
Kim Cheol-Soo
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Abstract
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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.
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KEYWORD
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AtPGR, glucose, jasmonic acid, pathogen, salicylic acid
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