Expression of the ethylene response factor gene TSRF1 enhances abscisic acid responses during seedling development in tobacco

文献类型： 外文期刊

第一作者： Zhang, Hongbo

作者： Zhang, Hongbo;Zhang, Zhijin;Huang, Rongfeng;Zhang, Hongbo;Chen, Jia;Wang, Xue-Chen;Yang, Yuhong;Zhang, Hongbo;Zhang, Zhijin;Huang, Rongfeng

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关键词： abscisic acid;ERF protein TSRF1;CE1/GCC-containing genes;seedling development;senescence;REGULATES PATHOGEN RESISTANCE;OSMOTIC-STRESS TOLERANCE;TRANSCRIPTION FACTOR;GCC BOX;ARABIDOPSIS-THALIANA;FUNCTIONAL-CHARACTERIZATION;RALSTONIA-SOLANACEARUM;DISEASE RESISTANCE;DEFENSE RESPONSES;SIGNALING PATHWAY

期刊名称：PLANTA （ 影响因子：4.116； 五年影响因子：4.316 ）

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收录情况： SCI

摘要： Ethylene response factor (ERF) proteins function as multiple regulators in the interaction of different stress-responsive pathways. During investigating the interaction of ethylene and abscisic acid (ABA) pathways, several GCC-box-binding repressors of ERF proteins have been reported to repress both ethylene- and ABA-related responses, but it is unclear how GCC-box-binding activator ERF proteins are involved in this interaction. Previously, we isolated an ERF protein tomato stress-responsive factor 1 (TSRF1) from tomato by yeast one hybrid, and showed that TSRF1 as a transcriptional activator physically interacts with GCC box, and activates the expression of GCC box-containing genes and enhances resistance to pathogens, while ABA treatment alters the binding ability of TSRF1 with this element and decreases resistance to pathogen Ralstonia solanacearum. Here, we further report that TSRF1 is able to interact with a GCC box-like sequence (indicated as CE1/GCC in this paper) containing the core sequence of ZmABI4-binding-CE1-like element, and regulates ABA responses. Overexpression of TSRF1 in tobacco enhances ABA sensitivity during germination, cotyledon expansion and root elongation. Biochemical and molecular analyses demonstrate that TSRF1 interacts with CE1/GCC. Importantly, ABA treatment enhances the interaction of TSRF1 with the ABA-responsive element and subsequently increasing the expression of ABA-responsive or CE1/GCC-containing genes. In addition, TSRF1 also promotes the expression of senescence-associated genes and tobacco seedling senescence in response to ABA. These results show that TSRF1, a GCC-box-binding activator in plant pathogen resistance, positively regulates ABA-related plant developmental processes.

分类号： Q94

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