ArticlePloS one2022
Identification of reference genes and their validation for gene expression analysis in phytopathogenic fungus Macrophomina phaseolina.
Article in PloS one, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 1 paper.
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10 authors at 2 institutions in 1 country.
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Abstract
Macrophomina phaseolina is a soil-borne pathogenic fungus that infects a wide range of crop species and causes severe yield losses. Although the genome of the fungus has been sequenced, the molecular basis of its virulence has not been determined. Identification of up-regulated genes during fungal infection is important to understand the mechanism involved in its virulence. To ensure reliable quantification, expression of target genes needs to be normalized on the basis of certain reference genes. However, in the case of M. phaseolina, reference genes or their expression analysis have not been reported in the literature. Therefore, the objective of this study was to evaluate 12 candidate reference genes for the expression analysis of M. phaseolina genes by applying three different fungal growth conditions: a) during root and stem infection of soybean, b) in culture media with and without soybean leaf infusion and c) by inoculating a cut-stem. Based on BestKeeper, geNorm and NormFinder algorithms, CYP1 was identified as the best recommended reference gene followed by EF1β for expression analysis of fungal gene during soybean root infection. Besides Mp08158, CYP1 gene was found suitable when M. phaseolina was grown in potato-dextrose broth with leaf infusion. In the case of cut-stem inoculation, Mp08158 and Mp11185 genes were found to be most stable. To validate the selected reference genes, expression analysis of two cutinase genes was performed. In general, the expression patterns were similar when the target genes were normalized against most or least stable gene. However, in some cases different expression pattern can be obtained when least stable gene is used for normalization. We believe that the reference genes identified and validated in this study will be useful for gene expression analysis during host infection with M. phaseolina.
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