Genome-Wide Profiling of miRNAs and Other Small Non-Coding RNAs in the Verticillium dahliae-Inoculated Cotton Roots

文献类型： 外文期刊

第一作者： Zujun Yin;;Yan Li

作者： Zujun Yin;Yan Li;Xiulan Han;Fafu Shen

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期刊名称：PLOS ONE （ 影响因子：3.24； 五年影响因子：3.788 ）

ISSN： 1932-6203

年卷期： 2012 年 7 卷 4 期

页码：

收录情况： SCI

摘要： MicroRNAs (miRNAs) and small interfering RNAs (siRNAs) are short (19-25 nucleotides) non-coding RNA molecules that have large-scale regulatory effects on development and stress responses in plants. Verticillium wilt is a vascular disease in plants caused by the fungal pathogen Verticillium dahliae. The objective of this study is to investigate the transcriptional profile of miRNAs and other small non-coding RNAs in Verticillium-inoculated cotton roots. Four small RNA libraries were constructed from mocked and infected roots of two cotton cultured species which are with different Verticillium wilt tolerance ('Hai-7124', Gossypium barbadense L., a Verticillium-tolerant cultivar, and 'Yi-11', Gossypium hirsutum L. a Verticillium-sensitive cultivar). The length distribution of obtained small RNAs was significantly different between libraries. There were a total of 215 miRNA families identified in the two cotton species. Of them 14 were novel miRNAs. There were >65 families with different expression between libraries. We also identified two trans-acting siRNAs and thousands of endogenous siRNA candidates, and hundred of them exhibited altered expression after inoculation of Verticillium. Interesting, many siRNAs were found with a perfect match with retrotransposon sequences, suggested that retrotransposons maybe one of sources for the generation of plant endogenous siRNAs. The profiling of these miRNAs and other small non-coding RNAs lay the foundation for further understanding of small RNAs function in the regulation of Verticillium defence responses in cotton roots.

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