Selection and Optimization of Reference Genes for MicroRNA Expression Normalization by qRT-PCR in Chinese Cedar (Cryptomeria fortunei) under Multiple Stresses

被引:11
|
作者
Zhang, Yingting [1 ,2 ,3 ]
Xue, Jinyu [1 ,2 ,3 ]
Zhu, Lijuan [1 ,2 ,3 ]
Hu, Hailiang [1 ,2 ,3 ]
Yang, Junjie [1 ,2 ,3 ]
Cui, Jiebing [1 ,2 ,3 ]
Xu, Jin [1 ,2 ,3 ]
机构
[1] Nanjing Forestry Univ, Key Lab Forest Genet & Biotechnol, Minist Educ, Nanjing 210037, Peoples R China
[2] Nanjing Forestry Univ, Coinnovat Ctr Sustainable Forestry Southern China, Nanjing 210037, Peoples R China
[3] Nanjing Forestry Univ, Coll Forestry, Nanjing 210037, Peoples R China
关键词
miRNAs; reference gene; qRT-PCR; abiotic stress; hormone treatment; tissue; SUITABLE REFERENCE GENES; INNER REFERENCE GENES; REAL-TIME PCR; ABIOTIC STRESS;
D O I
10.3390/ijms22147246
中图分类号
Q5 [生物化学]; Q7 [分子生物学];
学科分类号
071010 ; 081704 ;
摘要
MicroRNA (miRNA) expression analysis is very important for investigating its functions. To date, no research on reference genes (RGs) for miRNAs in gymnosperms, including Cryptomeria fortunei, has been reported. Here, ten miRNAs (i.e., pab-miR159a, cln-miR162, cas-miR166d, pab-miR395b, ppt-miR894, cln-miR6725, novel1, novel6, novel14 and novel16) and three common RGs (U6, 5S and 18S) were selected as candidate RGs. qRT-PCR was used to analyse their expressions in C. fortunei under various experimental conditions, including multiple stresses (cold, heat, drought, salt, abscisic acid and gibberellin) and in various tissues (roots, stems, tender needles, cones and seeds). Four algorithms (delta Ct, geNorm, NormFinder and BestKeeper) were employed to assess the stability of candidate RG expression; the geometric mean and RefFinder program were used to comprehensively evaluate RG stability. According to the results, novel16, cln-miR6725, novel1 and U6 were the most stable RGs for studying C. fortunei miRNA expression. In addition, the expression of three target miRNAs (aly-miR164c-5p, aly-miR168a-5p and smo-miR396) was examined to verify that the selected RGs are suitable for miRNA expression normalisation. This study may aid further investigations of miRNA expression/function in the response of C. fortunei to abiotic stress and provides an important basis for the standardisation of miRNA expression in other gymnosperm species.
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页数:21
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