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Evaluation of appropriate reference gene for normalization of microRNA expression by real-time PCR in Lablab purpureus under abiotic stress conditions

  • Adikeshavan Thilagavathy und Varadahally R. Devaraj EMAIL logo
Veröffentlicht/Copyright: 14. Juli 2016
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Biologia
Aus der Zeitschrift Biologia Band 71 Heft 6

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.

Acknowledgements

Adikeshavan Thilagavathy acknowledges the Department of Science and Technology (DST), New Delhi, India, for INSPIRE Fellowship (Code No: IF120387). The authors acknowledge Department of Biochemistry, Indian Institute of Science, for providing Central instrumentation facility to carry out RT-qPCR using Biorad iQ5 Multicolor Real Time PCR Detection System.

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Abbreviations
Cq

quantification cycle

miRNA

microRNA

PP2A

protein phosphatase 2A

RT-qPCR

reverse transcription quantitative PCR

SD

standard deviation.

Received: 2015-12-15
Accepted: 2016-6-15
Published Online: 2016-7-14
Published in Print: 2016-6-1

©2016 Institute of Molecular Biology, Slovak Academy of Sciences

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