Spatio-temporal selection of reference genes in the two congeneric species of Glycyrrhiza

Abstract Glycyrrhiza, a genus of perennial medicinal herbs, has been traditionally used to treat human diseases, including respiratory disorders. Functional analysis of genes involved in the synthesis, accumulation, and degradation of bioactive compounds in these medicinal plants requires accurate m...

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Main Authors: Yuping Li, Xiaoju Liang, Xuguo Zhou, Yu An, Ming Li, Ling Yuan, Yongqing Li, Ying Wang
Format: Article
Language:English
Published: Nature Portfolio 2021-03-01
Series:Scientific Reports
Online Access:https://doi.org/10.1038/s41598-020-79298-8
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author Yuping Li
Xiaoju Liang
Xuguo Zhou
Yu An
Ming Li
Ling Yuan
Yongqing Li
Ying Wang
author_facet Yuping Li
Xiaoju Liang
Xuguo Zhou
Yu An
Ming Li
Ling Yuan
Yongqing Li
Ying Wang
author_sort Yuping Li
collection DOAJ
description Abstract Glycyrrhiza, a genus of perennial medicinal herbs, has been traditionally used to treat human diseases, including respiratory disorders. Functional analysis of genes involved in the synthesis, accumulation, and degradation of bioactive compounds in these medicinal plants requires accurate measurement of their expression profiles. Reverse transcription quantitative real-time PCR (RT-qPCR) is a primary tool, which requires stably expressed reference genes to serve as the internal references to normalize the target gene expression. In this study, the stability of 14 candidate reference genes from the two congeneric species G. uralensis and G. inflata, including ACT, CAC, CYP, DNAJ, DREB, EF1, RAN, TIF1, TUB, UBC2, ABCC2, COPS3, CS, R3HDM2, were evaluated across different tissues and throughout various developmental stages. More importantly, we investigated the impact of interactions between tissue and developmental stage on the performance of candidate reference genes. Four algorithms, including geNorm, NormFinder, BestKeeper, and Delta Ct, were used to analyze the expression stability and RefFinder, a comprehensive software, provided the final recommendation. Based on previous research and our preliminary data, we hypothesized that internal references for spatio-temporal gene expression are different from the reference genes suited for individual factors. In G. uralensis, the top three most stable reference genes across different tissues were R3HDM2, CAC and TUB, while CAC, CYP and ABCC2 were most suited for different developmental stages. CAC is the only candidate recommended for both biotic factors, which is reflected in the stability ranking for the spatio (tissue)-temporal (developmental stage) interactions (CAC, R3HDM2 and DNAJ). Similarly, in G. inflata, COPS3, R3HDM2 and DREB were selected for tissues, while RAN, COPS3 and CS were recommended for developmental stages. For the tissue-developmental stage interactions, COPS3, DREB and ABCC2 were the most suited reference genes. In both species, only one of the top three candidates was shared between the individual factors and their interactions, specifically, CAC in G. uralensis and COPS3 in G. inflata, which supports our overarching hypothesis. In summary, spatio-temporal selection of reference genes not only lays the foundation for functional genomics research in Glycyrrhiza, but also facilitates these traditional medicinal herbs to reach/maximize their pharmaceutical potential.
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spelling doaj.art-0819945d15e541b0ae1c3bf29c9fcc962022-12-21T23:11:38ZengNature PortfolioScientific Reports2045-23222021-03-0111111310.1038/s41598-020-79298-8Spatio-temporal selection of reference genes in the two congeneric species of GlycyrrhizaYuping Li0Xiaoju Liang1Xuguo Zhou2Yu An3Ming Li4Ling Yuan5Yongqing Li6Ying Wang7Key Laboratory of South China Agricultural Plant Molecular Analysis and Genetic Improvement and Guangdong Provincial Key Laboratory of Applied Botany, South China Botanical Garden, Chinese Academy of SciencesKey Laboratory of South China Agricultural Plant Molecular Analysis and Genetic Improvement and Guangdong Provincial Key Laboratory of Applied Botany, South China Botanical Garden, Chinese Academy of SciencesDepartment of Entomology, University of KentuckyInstitute of Desertification Control, Ningxia Academy of Agriculture and Forestry SciencesInstitute of Desertification Control, Ningxia Academy of Agriculture and Forestry SciencesKey Laboratory of South China Agricultural Plant Molecular Analysis and Genetic Improvement and Guangdong Provincial Key Laboratory of Applied Botany, South China Botanical Garden, Chinese Academy of SciencesKey Laboratory of South China Agricultural Plant Molecular Analysis and Genetic Improvement and Guangdong Provincial Key Laboratory of Applied Botany, South China Botanical Garden, Chinese Academy of SciencesKey Laboratory of South China Agricultural Plant Molecular Analysis and Genetic Improvement and Guangdong Provincial Key Laboratory of Applied Botany, South China Botanical Garden, Chinese Academy of SciencesAbstract Glycyrrhiza, a genus of perennial medicinal herbs, has been traditionally used to treat human diseases, including respiratory disorders. Functional analysis of genes involved in the synthesis, accumulation, and degradation of bioactive compounds in these medicinal plants requires accurate measurement of their expression profiles. Reverse transcription quantitative real-time PCR (RT-qPCR) is a primary tool, which requires stably expressed reference genes to serve as the internal references to normalize the target gene expression. In this study, the stability of 14 candidate reference genes from the two congeneric species G. uralensis and G. inflata, including ACT, CAC, CYP, DNAJ, DREB, EF1, RAN, TIF1, TUB, UBC2, ABCC2, COPS3, CS, R3HDM2, were evaluated across different tissues and throughout various developmental stages. More importantly, we investigated the impact of interactions between tissue and developmental stage on the performance of candidate reference genes. Four algorithms, including geNorm, NormFinder, BestKeeper, and Delta Ct, were used to analyze the expression stability and RefFinder, a comprehensive software, provided the final recommendation. Based on previous research and our preliminary data, we hypothesized that internal references for spatio-temporal gene expression are different from the reference genes suited for individual factors. In G. uralensis, the top three most stable reference genes across different tissues were R3HDM2, CAC and TUB, while CAC, CYP and ABCC2 were most suited for different developmental stages. CAC is the only candidate recommended for both biotic factors, which is reflected in the stability ranking for the spatio (tissue)-temporal (developmental stage) interactions (CAC, R3HDM2 and DNAJ). Similarly, in G. inflata, COPS3, R3HDM2 and DREB were selected for tissues, while RAN, COPS3 and CS were recommended for developmental stages. For the tissue-developmental stage interactions, COPS3, DREB and ABCC2 were the most suited reference genes. In both species, only one of the top three candidates was shared between the individual factors and their interactions, specifically, CAC in G. uralensis and COPS3 in G. inflata, which supports our overarching hypothesis. In summary, spatio-temporal selection of reference genes not only lays the foundation for functional genomics research in Glycyrrhiza, but also facilitates these traditional medicinal herbs to reach/maximize their pharmaceutical potential.https://doi.org/10.1038/s41598-020-79298-8
spellingShingle Yuping Li
Xiaoju Liang
Xuguo Zhou
Yu An
Ming Li
Ling Yuan
Yongqing Li
Ying Wang
Spatio-temporal selection of reference genes in the two congeneric species of Glycyrrhiza
Scientific Reports
title Spatio-temporal selection of reference genes in the two congeneric species of Glycyrrhiza
title_full Spatio-temporal selection of reference genes in the two congeneric species of Glycyrrhiza
title_fullStr Spatio-temporal selection of reference genes in the two congeneric species of Glycyrrhiza
title_full_unstemmed Spatio-temporal selection of reference genes in the two congeneric species of Glycyrrhiza
title_short Spatio-temporal selection of reference genes in the two congeneric species of Glycyrrhiza
title_sort spatio temporal selection of reference genes in the two congeneric species of glycyrrhiza
url https://doi.org/10.1038/s41598-020-79298-8
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