Identification and characterization of heat-responsive microRNAs at the booting stage in two rice varieties, 9311 and Nagina 22

文献类型： 外文期刊

第一作者： Luo, Ying

作者： Luo, Ying;Wang, Tao;Yang, Dan;Luo, Biao;Wang, Qi-Ming;Rao, Li-Qun;Luo, Ying;He, Fu-Lin;Wang, Wei-Ping;Yu, Dong

作者机构：

关键词： rice; heat-responsive; microRNA; target gene; booting stage; high-throughput sequencing

期刊名称：GENOME （ 影响因子：2.166； 五年影响因子：2.474 ）

ISSN： 0831-2796

年卷期： 2021 年 64 卷 11 期

页码：

收录情况： SCI

摘要： MicroRNAs (miRNAs) are small, non-coding, regulatory RNAs that play important roles in abiotic stress responses in plants, but their regulatory roles in the adaptive response to heat stress at the booting stage in two rice varieties, 9311 and Nagina 22, remain largely unknown. In this study, 464 known miRNAs and 123 potential novel miRNAs were identified. Of these miRNAs, a total of 90 differentially expressed miRNAs were obtained with 9311 libraries as the control group, of which 54 were upregulated and 36 were downregulated. To gain insight into functional significance, 2773 potential target genes of these 90 differentially expressed miRNAs were predicted. GO enrichment analysis showed that the predicted target genes of differentially expressed miRNAs included NACs, LACs, CSD, and Hsp40. KEGG pathway analysis showed that the target genes of these differentially expressed miRNAs were significantly enriched in the plant hormone signal transduction pathway. The expression levels of 10 differentially expressed miRNAs and their target genes obtained by qRT-PCR were largely consistent with the sequencing results. This study lays a foundation for the elucidation of the miRNA-mediated regulatory mechanisms in rice at elevated temperatures.

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