期刊
PLANTS-BASEL
卷 10, 期 4, 页码 -出版社
MDPI
DOI: 10.3390/plants10040669
关键词
grapevine; miRNA; photoperiod; dormancy; regulatory network
资金
- National Science Foundation/EPSCOR Cooperative Agreement [IIA1355423]
- State of South Dakota through BioSNTR, a South Dakota Research Innovation Center
- South Dakota Agriculture Experiment Station
The transition of grapevine buds from paradormancy to endodormancy is coordinated by changes in gene expression, phytohormones, transcription factors, and other molecular regulators. Analysis of differential gene expression profiles revealed downregulation of hormone signaling and cell cycling genes in endodormant buds, while miRNA abundance increased for genes negatively regulating cell cycle and meristem development. A network connecting abundant miRNAs and transcription factors was identified, indicating cross regulation between miRNA and transcription factors in regulating dormancy stages.
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) Vitis riparia buds. There were 400 up- and 936 downregulated differentially expressed genes in SD relative to LD buds. Gene 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 MYB3R1.
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