数字农科院2.0

Integrated Mrna And Small Rna S.equencing Reveals Microrna Regulatory N etwork Associated With Internode Elongation In Sugarcane (Saccharum Officinarum L.)

文献类型： 外文期刊

作者： Liu, Junxian;Luo, Hanmin;Xiong, Faqian;Fan, Yegeng;Huang, Xing;Liu, Junxian;Zhang, Ronghua;Qiu, Lihang;Zhou, Huiwen;Fan, Yegeng;Zhang, Ronghua;Wu, Jianming;Li, Yangrui;Luo, Hanmin;Xiong, Faqian;Liu, Junxian;Lei, Jingchao;Li, Yangrui;Luo, Hanmin;Chen, Rongfa;Huang, Xing;Fan, Yegeng;Zhang, Ronghua;Lei, Jingchao;Wu, Jianming;Qiu, Lihang;Li, Yangrui;Lei, Jingchao;Qiu, Lihang;Huang, Xing;Chen, Rongfa;Chen, Rongfa;Wu, Jianming;Zhou, Huiwen;Zhou, Huiwen

作者机构：

关键词： Transcriptome; Next-generation sequencing; Zeatin biosynthesis; Nitrogen metabolism; Plant hormone signal transduction

期刊名称： BMC GENOMICS

ISSN： 1471-2164

年卷期： 2019 年 20 卷 1 期

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摘要： Background Internode elongation is one of the most important traits in sugarcane because of its relation to crop productivity. Understanding the microRNA (miRNA) and mRNA expression profiles related to sugarcane internode elongation would help develop molecular improvement strategies but they are not yet well-investigated. To identify genes and miRNAs involved in internode elongation, the cDNA and small RNA libraries from the pre-elongation stage (EI), early elongation stage (EII) and rapid elongation stage (EIII) were sequenced and their expression were studied. Results Based on the sequencing results, 499,495,518 reads and 80,745 unigenes were identified from stem internodes of sugarcane. The comparisons of EI vs. EII, EI vs. EIII, and EII vs. EIII identified 493, 5035 and 3041 differentially expressed genes, respectively. Further analysis revealed that the differentially expressed genes were enriched in the GO terms oxidoreductase activity and tetrapyrrole binding. KEGG pathway annotation showed significant enrichment in "zeatin biosynthesis", "nitrogen metabolism" and "plant hormone signal transduction", which might be participating in internode elongation. miRNA identification showed 241 known miRNAs and 245 novel candidate miRNAs. By pairwise comparison, 11, 42 and 26 differentially expressed miRNAs were identified from EI and EII, EI and EIII, and EII and EIII comparisons, respectively. The target prediction revealed that the genes involved in "zeatin biosynthesis", "nitrogen metabolism" and "plant hormone signal transduction" pathways are targets of the miRNAs. We found that the known miRNAs miR2592-y, miR1520-x, miR390-x, miR5658-x, miR6169-x and miR8154-x were likely regulators of genes with internode elongation in sugarcane. Conclusions The results of this study provided a global view of mRNA and miRNA regulation during sugarcane internode elongation. A genetic network of miRNA-mRNA was identified with miRNA-mediated gene expression as a mechanism in sugarcane internode elongation. Such evidence will be valuable for further investigations of the molecular regulatory mechanisms underpinning sugarcane growth and development.

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