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Combined small RNA and degradome sequencing to identify miRNAs and their targets in response to drought in foxtail millet

文献类型： 外文期刊

作者： Wang, Yongqiang 1 ; Li, Lin 1 ; Tang, Sha 2 ; Liu, Jianguang 3 ; Zhang, Hanshuang 3 ; Zhi, Hui 2 ; Jia, Guanqing 2 ; Diao 1 ;

作者机构： 1.Hebei Normal Univ, Coll Life Sci, Shijiazhuang 050012, Peoples R China

2.Chinese Acad Agr Sci, Inst Crop Sci, Beijing 100081, Peoples R China

3.Hebei Acad Agr & Forestry Sci, Inst Cotton, Shijiazhuang 05003, Peoples R China

关键词： miRNA;High-throughput sequencing;Drought;Foxtail millet;Degradome

期刊名称：BMC GENETICS （ 影响因子：2.797； 五年影响因子：3.263 ）

ISSN： 1471-2156

年卷期： 2016 年 17 卷

页码：

收录情况： SCI

摘要： Background: Foxtail millet (Setaria italica) is a diploid C-4 panicoid species. Because of its prominent drought resistance, small genome size, self-pollination, and short life cycle, foxtail millet has become an ideal model system for studying drought tolerance of crops. MicroRNAs (miRNAs) are endogenous, small RNAs that play important regulatory roles in the development and stress response in plants. Results: In this study, we applied Illumina sequencing to systematically investigate the drought-responsive miRNAs derived from S. italica inbred An04-4783 seedlings grown under control and drought conditions. Degradome sequencing was applied to confirm the targets of these miRNAs at a global level. A total of 81 known miRNAs belonging to 28 families were identified, among which 14 miRNAs were upregulated and four were downregulated in response to drought. In addition, 72 potential novel miRNAs were identified, three of which were differentially expressed under drought conditions. Degradome sequencing analysis showed that 56 and 26 genes were identified as targets of known and novel miRNAs, respectively. Conclusions: Our analysis revealed post-transcriptional remodeling of cell development, transcription factors, ABA signaling, and cellar homeostasis in S. italica in response to drought. This preliminary characterization provided useful information for further studies on the regulatory networks of drought-responsive miRNAs in foxtail millet.

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