文献类型： 外文期刊
作者： 景蕊莲;;毛新国;;李昂;;昌小平
作者机构：
关键词： TaPP2AbB
期刊名称： PLANT GROWTH REGULATION
ISSN： 0167-6903
年卷期： 2019 年 89 卷 3 期
页码：
收录情况： JCR（2021版）
摘要： Protein dephosphorylation mediated by serine/threonine protein phosphatase 2A (PP2A) plays critical roles in regulation of abiotic stress responses in plants. Here, we report the involvement of a B '' regulatory subunit of PP2A in wheat (Triticum aestivum L.), TaPP2AbB ''-gamma, in the positive regulation of stress responses. The transcript of TaPP2AbB ''-gamma was induced in roots of wheat seedlings by salinity, drought, cold stresses and exogenous ABA application. Overexpression of TaPP2AbB ''-gamma enhanced the tolerance to various environmental stresses in transgenic Arabidopsis seedlings. Yeast two-hybrid assay demonstrated that TaPP2AbB ''-gamma interact with the first 100 amino acids of TaBZR1, a positive regulator of Brassinosteroids (BRs) signaling. The expression of TaBZR1 gene was up-regulated in roots upon exposure to NaCl stress. All our results suggested that TaPP2AbB ''-gamma functions in improving abiotic stress tolerance by directly binding to TaBZR1, pointing to a possible cross-talk of BR signaling with TaPP2AbB ''-gamma mediated stress response.
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