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Selection and validation of reference genes desirable for gene expression analysis by qRT-PCR in MeJA-treated ginseng hairy roots


Autoři: Li Li aff001;  Kangyu Wang aff001;  Mingzhu Zhao aff001;  Shaokun Li aff001;  Yue Jiang aff001;  Lei Zhu aff001;  Jing Chen aff001;  Yanfang Wang aff002;  Chunyu Sun aff001;  Ping Chen aff001;  Jun Lei aff001;  Meiping Zhang aff001;  Yi Wang aff001
Působiště autorů: College of Life Science, Jilin Agricultural University, Changchun, Jilin, China aff001;  Research Center of Ginseng Genetic Resources Development and Utilization, Changchun, Jilin, China aff002;  College of Chinese Medicinal Materials, Jilin Agricultural University, Changchun, Jilin, China aff003;  Key Laboratory of Natural Resources of Changbai Mountain & Functional Molecules (Yanbian University), Ministry of Education, Yanji, Jilin, China aff004
Vyšlo v časopise: PLoS ONE 14(12)
Kategorie: Research Article
doi: https://doi.org/10.1371/journal.pone.0226168

Souhrn

Ginseng is a valuable herb of traditional Chinese medicine and ginsenosides, the main bioactive components of ginseng, have been proven to have multiple functions in human therapies and health. Methyl jasmonate (MeJA) is an elicitor that has been demonstrated to have a vital influence on ginsenoside biosynthesis. Quantitative real-time polymerase chain reaction (qRT-PCR) has been widely used in quantification of gene expressions. Here, we report the selection and validation of reference genes desirable for normalization of gene expressions quantified by qRT-PCR in ginseng hairy roots treated with MeJA. Twelve reference genes were selected as candidate genes, and their expressions were quantified by qRT-PCR, and analyzed by geNorm, NormFinder and BestKeeper. CYP and EF-1α were shown to be the most stable reference genes in geNorm, CYP was the most stable reference gene in NormFinder, and 18S was the most stable reference gene in BestKeeper. On this basis, we further quantified the relative expression levels of four genes encoding key enzymes that are involved in ginsenoside biosynthesis using CYP and 18S as the reference genes, respectively. Moreover, correlation analysis was performed between the quantified expressions of four genes and the ginsenoside content in MeJA-treated ginseng hairy roots. The results of relative expressions of the four genes quantified using CYP as the reference gene and their significant correlations with the ginsenoside content were better than those using 18S as the reference gene. The CYP gene, hence, was concluded as the most desirable reference gene for quantification of the expressions of genes in MeJA-treated ginseng hairy roots. This finding, therefore, provides information useful for gene research in ginseng, particularly in MeJA-treated ginseng hairy roots, which includes identification and characterization of genes involved in ginsenoside biosynthesis.

Klíčová slova:

Biosynthesis – Gene expression – Hair – Polymerase chain reaction – RNA extraction – Seedlings – Glycosides – Secondary metabolism


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