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- W4387357130 abstract "Summary Brassinosteroids (BRs) play a crucial role in shaping the architecture of rice ( Oryza sativa ) plants. However, the regulatory mechanism of BR signalling in rice immunity remains largely unexplored. Here we identify a rice mutant dla , which exhibits decreased leaf angles and is insensitive to 24‐epiBL (a highly active synthetic BR), resembling the BR‐deficient phenotype. The dla mutation caused by a T‐DNA insertion in the OsDLA gene leads to downregulation of the causative gene . The OsDLA knockout plants display reduced leaf angles and less sensitivity to 24‐epiBL. In addition, both dla mutant and OsDLA knockout plants are more susceptible to rice blast compared to the wild type. OsDLA is a GRAS transcription factor and interacts with the BR signalling core negative regulator, GSK2. GSK2 phosphorylates OsDLA for degradation via the 26S proteasome. The GSK2 RNAi line exhibits enhanced rice blast resistance, while the overexpression lines thereof show susceptibility to rice blast. Furthermore, we show that OsDLA interacts with and stabilizes the WRKY transcription factor OsWRKY53, which has been demonstrated to positively regulate BR signalling and blast resistance. OsWRKY53 directly binds the promoter of PBZ1 and activates its expression, and this activation can be enhanced by OsDLA. Together, our findings unravel a novel mechanism whereby the GSK2‐OsDLA‐OsWRKY53 module coordinates blast resistance and plant architecture via BR signalling in rice." @default.
- W4387357130 created "2023-10-06" @default.
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- W4387357130 date "2023-10-05" @default.
- W4387357130 modified "2023-10-15" @default.
- W4387357130 title "The GRAS protein OsDLA involves in brassinosteroid signalling and positively regulates blast resistance by forming a module with GSK2 and OsWRKY53 in rice" @default.
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- W4387357130 doi "https://doi.org/10.1111/pbi.14190" @default.
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