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• W3199039824 abstract "Abstract Yam tuber is a storage organ, derived from modified stem. Tuber expansion is a complex process, it depends on the expression of genes that can be influenced by environmental and endogenous factors. However, little is known about the mechanism that regulates tuber expansion. In order to identify genes and miRNAs involved in tuber enlargement, we examined the transcriptome and small RNA in yam tuber during its initiation and expansion stages. A total of 14238 differentially expressed transcripts in yam tuber at its expansion stage were identified by using transcriptome technology. Among them, 5723 genes were up-regulated and 8515 genes were down-regulated, respectively. Functional analysis revealed the coordination of tuber plant involved in processes of cell events, metabolism, biosynthesis, and signal transduction pathways at transcriptional level, suggesting that these DEGs are somehow involved in response of tuber expansion. In addition, 536 transcription factor genes showed differential expression during the expansion stage at transcriptional level. REVEILLE 6-like was identified to be up-regulated in the circadian rhythm pathway. REVEILLE 6-like LHY protein, zinc finger CCCH domain-containing protein 14, and DELLA genes were up-regulated in expansion stage. Moreover, these genes were involved in circadian rhythm pathway, starch and sucrose metabolism pathway, and GA pathway by KEGG analysis respectively. Noteworthy, data analysis revealed that 23 known tuber miRNAs belong to 11 miRNA families, and 50 novel miRNAs were identified. miRNA160, miRNA396, and miRNA535 may be involved in complex network to regulate cell division and differentiation in yam during its expansion stage. The integrated analysis of miRNA-mRNA identified to be preferentially expressed in hormone signaling in expansion stage, miRNA160 was down-regulated in expansion stage, ARF18 and ARF17 were up-regulated in auxin signal transduction of tuber expansion in yam, highlighting the involvement of miRNA-mRNA in the regulation the hormone. The transcriptome and miRNA datasets presented here identified a subset of candidate genes and miRNAs that are putatively associated with tuber expansion in yam, thus a hypothetical model of genetic regulatory network associated with tuber expansion in yam was put forward, which may provide a foundation for molecular regulatory mechanism researching on tuber expansion in Dioscorea species." @default.
• W3199039824 created "2021-09-27" @default.
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• W3199039824 date "2019-06-06" @default.
• W3199039824 modified "2023-09-25" @default.
• W3199039824 title "Integrated mRNA and miRNA transcriptome analysis reveals regulatory network of yam tuber expansion" @default.
• W3199039824 doi "https://doi.org/10.21203/rs.2.9777/v2" @default.
• W3199039824 hasPublicationYear "2019" @default.
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