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首页> 外文期刊>The New Phytologist >The 14-3-3 protein GENERAL REGULATORY FACTOR11 (GRF11) acts downstream of nitric oxide to regulate iron acquisition in Arabidopsis thaliana
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The 14-3-3 protein GENERAL REGULATORY FACTOR11 (GRF11) acts downstream of nitric oxide to regulate iron acquisition in Arabidopsis thaliana

机译:14-3-3蛋白一般调节因子11(GRF11)在一氧化氮的下游起作用,调节拟南芥中的铁吸收

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摘要

Here we report the function of a general regulatory factor, GENERAL REGULATORYFACTOR11 (GRF11), in terms of the iron (Fe) deficiency response. Physiological and molecular responses of the loss-of-function Arabidopsis thaliana grill mutant to Fe supply were investigated. Genes involved in posttranscriptional regulation of FER-LIKEFE DEFICIENCY-INDUCED TRANSCRIPTION FACTOR (FIT) were also analyzed. Inaddition, the molecular link between the signaling molecule nitric oxide (NO) and Fe deficiency responses was further dissected. Our results suggest that GRF11 is necessary for induction of Fe-deficiency-tolerance mechanisms. The FIT protein can bind tothe promoter of GRF11, which contains an E-box motif. GRF11 also positively affects FIT transcription but has no influence on the genes involved in posttranscriptional regulation of FIT. Furthermore, NO positively regulates GRF11 inductionupon the onset of Fe deficiency. We propose that, upon the onset of Fe deficiency, induction of FIT expression is dependent on GRF11, which acts downstream of NO to mediate Fe deficiency responses.
机译:在这里,我们根据铁(Fe)缺乏反应报告了一般调节因子GENERAL REGULATORYFACTOR11(GRF11)的功能。研究了功能丧失的拟南芥烧烤突变体对铁供应的生理和分子响应。还分析了与FER-LIKEFE缺陷诱导转录因子(FIT)的转录后调控有关的基因。此外,信号分子一氧化氮(NO)和铁缺乏反应之间的分子联系被进一步剖析。我们的结果表明,GRF11是诱导铁缺乏耐受机制所必需的。 FIT蛋白可以结合GRF11的启动子,该启动子包含E-box基序。 GRF11还积极影响FIT转录,但对FIT转录后调控中涉及的基因没有影响。此外,NO在铁缺乏症发作时正调控GRF11的诱导。我们建议,在Fe缺乏症发作时,FIT表达的诱导依赖于GRF11,GRF11在NO下游起作用以介导Fe缺乏症反应。

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