4.7 Article

Identification and analysis of miRNAs-lncRNAs-mRNAs modules involved in stem-elongation of deepwater rice (Oryza sativa L.)

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PHYSIOLOGIA PLANTARUM
卷 174, 期 4, 页码 -

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WILEY
DOI: 10.1111/ppl.13736

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资金

  1. Department of Biotechnology [BT/PR16097/NER/95/345/2015]

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This study explored the regulation of miRNAs and lncRNAs in response to deepwater stress in rice. Through small RNA-seq and RNA-seq analysis, deepwater stress responsive miRNAs and lncRNAs were predicted. Additionally, a ceRNA study revealed the interactions between certain miRNAs and lncRNAs. Furthermore, transient expression analysis in tobacco leaves provided insights into the regulatory network of miRNAs, lncRNAs, and their target genes in stem elongation under deepwater stress.
Deepwater is an abiotic stress that limits rice cultivation worldwide due to recurrent floods. The miRNAs and lncRNAs are two non-coding RNAs emerging as major regulators of gene expressions under different abiotic stresses. However, the regulation of these two non-coding RNAs under deepwater stress in rice is still unexplored. In this study, small RNA-seq and RNA-seq from internode and node tissues were analyzed to predict deepwater stress responsive miRNAs and lncRNAs, respectively. Additionally, a competitive endogenous RNA (ceRNA) study revealed about 69 and 25 lncRNAs acting as endogenous target mimics (eTM) with the internode and node miRNAs, respectively. In ceRNA analyses, some of the key miRNAs such as miR1850.1, miR1848, and IN-nov-miR145 were upregulated while miR159e was downregulated, and their respective eTM lncRNAs and targets were found to have opposite expressions. Moreover, we have transiently expressed one module (IN-nov-miR145-Cc-TCONS_00011544-Os11g36430.3) in tobacco leaves. The integrated analysis has identified differentially expressed (DE) miRNAs, lncRNAs and their target genes, and the complex regulatory network, which might lead to stem elongation under deepwater stress. In this novel attempt to identify and characterize miRNAs and lncRNAs under deepwater stress in rice, we have provided, probably for the first time, a reference platform to study the interactions of these two non-coding RNAs with respective target genes through transient expression analyses.

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