Abstract
MicroRNAs (miRNAs) play key roles in plant responses to biotic and abiotic stresses by modulating their own expression and a wide array of target mRNAs. Reverse transcription quantitative real-time PCR is a sensitive and widely used method to study miRNA expression profile. Accurate analysis and interpretation of results require the selection of an appropriate reference gene. Reference genes selected should have a constant expression level under different stress conditions. Six reference candidates, including two miRNAs (miRNA 156 and miRNA 172), an rRNA (5S rRNA), a snRNA (U6) and two protein coding genes (actin and protein phosphatase 2A), were selected for normalization of miRNA expression in Lablab purpureus. The expression stability of candidate reference genes was investigated in ten samples and analysed using NormFinder, BestKeeper and hkgFinder softwares. The analyses suggested that miRNA 156 is the appropriate reference gene, as it had better expression stability than protein-coding genes, and other non-coding RNAs.
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Abbreviations
- Cq:
-
quantification cycle
- miRNA:
-
microRNA
- PP2A:
-
protein phosphatase 2A
- RT-qPCR:
-
reverse transcription quantitative PCR
- SD:
-
standard deviation
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Thilagavathy, A., Devaraj, V.R. Evaluation of appropriate reference gene for normalization of microRNA expression by real-time PCR in Lablab purpureus under abiotic stress conditions. Biologia 71, 660–668 (2016). https://doi.org/10.1515/biolog-2016-0091
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DOI: https://doi.org/10.1515/biolog-2016-0091