Activation of Mitochondrial orf355 Gene Expression by a Nuclear-Encoded DREB Transcription Factor Causes Cytoplasmic Male Sterility in Maize

文献类型： 外文期刊

第一作者： Xiao, Senlin

作者： Xiao, Senlin;Zang, Jie;Pei, Yuanrong;Liu, Jie;Liu, Juan;Chen, Huabang;Zang, Jie;Pei, Yuanrong;Liu, Jie;Xiao, Senlin;Song, Wei;Shi, Zi;Su, Aiguo;Zhao, Jiuran

作者机构：

关键词： maize; cytoplasmic male sterility; transcription factor; nucleus-mitochondria communication

期刊名称：MOLECULAR PLANT （ 影响因子：13.164； 五年影响因子：16.357 ）

ISSN： 1674-2052

年卷期： 2020 年 13 卷 9 期

页码：

收录情况： SCI

摘要： Coordination between mitochondria and the nucleus is crucial for fertility determination in plants with cytoplasmic male sterility (CMS). Using yeast one-hybrid screening, we identified a transcription factor, ZmDREB1.7, that is highly expressed in sterile microspores at the large vacuole stage and activates the expression of mitochondria-encoded CMS gene orf355. Delta pro, a weak allele of ZmDREB1.7 with the loss of a key unfolded protein response (UPR) motif in the promoter, partially restores male fertility of CMS-S maize. ZmDREB1.7 expression increases rapidly in response to antimycin A treatment, but this response is attenuated in the Delta pro allele. Furthermore, we found that expression of orf355 in mitochondria activates mitochondria! retrograde signaling, which in turn induces ZmDREB1.7 expression. Taken together, these findings demonstrate that positive-feedback transcriptional regulation between a nuclear regulator and a mitochondrial CMS gene determines male sterility in maize, providing new insights into nucleus-mitochondria communication in plants.

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