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- W2076648283 abstract "The WRKY transcription factors are involved in plant resistance against both biotrophic and necrotrophic pathogens. Arabidopsis WRKY46 is specifically induced by salicylic acid (SA) and biotrophic pathogen Pseudomonas syringae infection. To determine its possible roles in plant defense and elucidate potential functional redundancy with structurally related WRKY70 and WRKY53, we examined loss-of-function T-DNA insertion single, double and triple mutants, as well as gain-of-function transgenic WRKY46 over-expressing plants in response to P. syringae. WRKY46 over-expressing plants were more resistant to P. syringae. In contrast, pathogen-infected wrky46wrky70, wrky46wrky53 double mutants and wrky46wrky70wrky53 triple mutants showed increased susceptibility to this pathogen, with increased bacterial growth and more severe disease symptoms. The contrasting responses of gain-of-function plants and loss-of-function mutants were correlated with increased or reduced expression of defense-related PR1 gene. Expression studies of WRKY46, WRKY70, and WRKY53 in various defense-signaling mutants suggested that they are partially involved in SA-signaling pathway. In addition, our findings demonstrated negative cross-regulation among these three genes. These results indicate that WRKY46, WRKY70, and WRKY53 positively regulate basal resistance to P. syringae; and that they play overlapping and synergetic roles in plant basal defense." @default.
- W2076648283 created "2016-06-24" @default.
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- W2076648283 date "2012-04-01" @default.
- W2076648283 modified "2023-10-16" @default.
- W2076648283 title "Arabidopsis WRKY46 coordinates with WRKY70 and WRKY53 in basal resistance against pathogen Pseudomonas syringae" @default.
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- W2076648283 doi "https://doi.org/10.1016/j.plantsci.2011.12.003" @default.
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