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基因表达与 microRNA 的综合分析揭示葡萄芽的相对休眠和内休眠相关生物学途径

Integrative Analysis of Gene Expression and miRNAs Reveal Biological Pathways Associated with Bud Paradormancy and Endodormancy in Grapevine.

作者信息

Smita Shuchi, Robben Michael, Deuja Anup, Accerbi Monica, Green Pamela J, Subramanian Senthil, Fennell Anne

机构信息

Edgar McFadden BioStress Laboratory, Agronomy, Horticulture, and Plant Science Department, BioSNTR, South Dakota State University, Brookings, SD 57007, USA.

Department of Plant and Soil Sciences and Delaware Biotechnology Institute, University of Delaware, Newark, DE 19713, USA.

出版信息

Plants (Basel). 2021 Mar 31;10(4):669. doi: 10.3390/plants10040669.

Abstract

Transition of grapevine buds from paradormancy to endodormancy is coordinated by changes in gene expression, phytohormones, transcription factors, and other molecular regulators, but the mechanisms involved in transcriptional and post-transcriptional regulation of dormancy stages are not well delineated. To identify potential regulatory targets, an integrative analysis of differential gene expression profiles and their inverse relationships with miRNA abundance was performed in paradormant (long day (LD) 15 h) or endodormant (short day (SD), 13 h) buds. There were 400 up- and 936 downregulated differentially expressed genes in SD relative to LD budsGene set and gene ontology enrichment analysis indicated that hormone signaling and cell cycling genes were downregulated in SD relative to LD buds. miRNA abundance and inverse expression analyses of miRNA target genes indicated increased abundance of miRNAs that negatively regulate genes involved with cell cycle and meristem development in endodormant buds and miRNAs targeting starch metabolism related genes in paradormant buds. Analysis of interactions between abundant miRNAs and transcription factors identified a network with coinciding regulation of cell cycle and epigenetic regulation related genes in SD buds. This network provides evidence for cross regulation occurring between miRNA and transcription factors both upstream and downstream of .

摘要

葡萄芽从生长休眠向生理休眠的转变是由基因表达、植物激素、转录因子和其他分子调节因子的变化协调的,但休眠阶段转录和转录后调控所涉及的机制尚未完全阐明。为了确定潜在的调控靶点,对处于生长休眠期(长日照(LD)15小时)或生理休眠期(短日照(SD)13小时)的芽进行了差异基因表达谱及其与miRNA丰度的反向关系的综合分析。与LD芽相比,SD芽中有400个上调和936个下调的差异表达基因。基因集和基因本体富集分析表明,与LD芽相比,SD芽中激素信号和细胞周期基因下调。miRNA丰度及其靶基因的反向表达分析表明,在生理休眠芽中,负调控细胞周期和分生组织发育相关基因的miRNA丰度增加,而在生长休眠芽中,靶向淀粉代谢相关基因的miRNA丰度增加。对丰富的miRNA与转录因子之间相互作用的分析确定了一个在SD芽中对细胞周期和表观遗传调控相关基因进行协同调控的网络。该网络为miRNA和转录因子在上下游之间发生的交叉调控提供了证据。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/691c/8067045/6ebd66fe53a0/plants-10-00669-g001a.jpg

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