Selection and validation of reference genes for transcript normalization in gene expression studies in Catharanthus
Jacob Pollier1, Robin Vanden Bossche1, Heiko Rischer2
1Department of Plant Systems Biology, VIB, Technologiepark 927, B-9052 Gent, Belgium; Department of Plant Biotechnology and Bioinformatics, Ghent University, Technologiepark 927, B-9052 Gent, Belgium.
Plant Physiology and Biochemistry : PPB
|July 25, 2014
Summary
New reference genes for Catharanthus roseus quantitative real-time PCR (qPCR) analysis were identified. SAND, N2227, and EXP genes show superior expression stability compared to RPS9 for accurate gene expression studies.
Area of Science:
- Plant molecular biology
- Genomics
- Biotechnology
Background:
- Quantitative Real-Time PCR (qPCR) is crucial for gene expression analysis.
- Accurate normalization in qPCR relies on stably expressed reference genes.
- Catharanthus roseus, a medicinal plant, currently has limited validated reference genes.
Purpose of the Study:
- To identify and validate novel, stable reference genes for qPCR in Catharanthus roseus.
- To improve the reliability of gene expression studies in this important medicinal plant.
- To find superior alternatives to the currently used RPS9 reference gene.
Main Methods:
- Mining Catharanthus roseus RNA-Seq data for orthologs of Arabidopsis thaliana reference genes.
- Identifying eight candidate reference genes.
- Evaluating candidate genes using qPCR across various C. roseus samples.
- Analyzing expression stability with NormFinder, geNorm, and BestKeeper algorithms.
Main Results:
- Three genes, orthologs of At2g28390 (SAND), At2g32170 (N2227), and At4g26410 (EXP), exhibited the highest expression stability.
- These identified genes (SAND, N2227, EXP) are superior reference genes compared to the traditional RPS9.
- Public RNA-Seq data analysis confirmed the stability of SAND and N2227.
Conclusions:
- SAND, N2227, and EXP are validated as reliable reference genes for qPCR in Catharanthus roseus.
- These findings provide essential tools for more accurate gene expression profiling in C. roseus.
- The study enhances the molecular toolkit for research on this medicinally important plant.
