Citrus sinensis MYB transcription factors CsMYB330 and CsMYB308 regulate fruit juice sac lignification through fine-tuning expression of the Cs4CL1 gene

文献类型： 外文期刊

第一作者： Jia, Ning

作者： Jia, Ning;Sun, Yufeng;Liu, Jiameng;Li, Minmin;Huang, Yatao;Lu, Jia;Jin, Nuo;Fan, Bei;Jia, Ning;Sun, Yufeng;Liu, Jiameng;Li, Minmin;Huang, Yatao;Lu, Jia;Jin, Nuo;Fan, Bei;Jia, Ning;Cao, Hao;Xie, Yingying;Wen, Boting;Gu, Tianyi;Sun, Lichao;Xin, Fengjiao;Liu, Jiqin;Tan, Penghui

作者机构：

关键词： Citrus sinensis; MYB; Transcriptional regulation; Lignification; Juice sac; Postharvest

期刊名称：PLANT SCIENCE （ 影响因子：4.729； 五年影响因子：5.132 ）

ISSN： 0168-9452

年卷期： 2018 年 277 卷

页码：

收录情况： SCI

摘要： Lignin is one of the most important components of the plant cell wall, and the expression and transcriptional regulation of lignin biosynthesis-related genes have been studied widely in Arabidopsis and other plants. Citrus fruit juice sacs often undergo lignification, particularly during fruit ripening and storage periods; however, the underlying genetic mechanisms have been little investigated. In this study, we isolated and identified CsMYB330 and CsMYB308 transcription factors, and found that their expression levels are significantly altered during the lignification of citrus fruit juice sacs. We found that CsMYB330 and CsMYB308 can recognize and bind AC elements in the Cs4CL1 promoter and finely regulate expression of the Cs4CL1 gene. In this regulatory process, CsMYB330 was identified as a transcriptional activator, whereas CsMYB308 appears to be a transcriptional repressor. In addition, using a transient assay, we demonstrated that expression of the Cs4CL1 gene is significantly altered in fruit juice sacs overexpressing these two transcription factors. These results indicate that the transcription factors CsMYB330 and CsMYB308 play important roles in the lignification of citrus fruit juice sacs and provide novel insights into the transcriptional regulation associated with fruit juice sac lignification.

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