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Molecular characterization of Penicillium expansum MUCL mutants
M Cercel1, C Mouillard, M Detertre
1National Institute for Chemical-Pharmaceutical Research and Development (ICCF), 112 Calea Vitan, Bucharest 3, 74373, Romania.
Abstract:
The modern biomolecular analysis of DNA was carried out to determine the identity of Penicillium expansum MUCL V1-V9 Variants with parental strain of Penicillium expansum MUCL 29412 and to compare the results with Penicillium verrucosum, a related species. The extracted DNAs were fragmented by digestion with restriction endonuclease Hind III and the fragments were separated by agarose gel electrophoresis. The DNAs were then denaturated in the gel after partial depurination with dilute acid and were transferred to a nylon membrane. The membrane was incubated with 32P-labeled probe, which was a DNA having a base sequence complementary to the DNA that was to be detected on the filter. The hybridization of the restriction fragments was performed for a highly qualitative comparison of the digested fragments. The analysis of the DNA profile, the most important stage in DNA identity testing, confirms the identity of the DNA for all strains of Penicillium expansum MUCL, except for V5 Variant.
Insights
DNA analysis confirmed the identity of most Penicillium expansum strains, except for the V5 variant. This biomolecular study compared these strains to a related species, Penicillium verrucosum.
Area of Science:
- Molecular Biology
- Mycology
- Genetics
Background:
- Accurate identification of fungal species and strains is crucial for various applications, including agriculture and food safety.
- Penicillium expansum is a significant plant pathogen, and understanding its genetic diversity is important for disease management.
Purpose of the Study:
- To identify Penicillium expansum MUCL V1-V9 variants using DNA analysis.
- To compare these variants with the parental strain (Penicillium expansum MUCL 29412).
- To differentiate Penicillium expansum from the related species Penicillium verrucosum.
Main Methods:
- DNA extraction and fragmentation using restriction endonuclease Hind III.
- Agarose gel electrophoresis for fragment separation.
- Southern blotting with a 32P-labeled DNA probe for hybridization.
- DNA profile analysis for qualitative comparison.
Main Results:
- DNA profiling confirmed the identity of Penicillium expansum MUCL strains V1-V4 and V6-V9.
- The V5 variant showed a different DNA profile, indicating potential misidentification or a distinct genetic makeup.
- Distinct DNA profiles were observed between Penicillium expansum and Penicillium verrucosum.
Conclusions:
- Biomolecular DNA analysis is effective for identifying Penicillium expansum strains.
- The V5 variant requires further investigation to confirm its identity.
- This method aids in distinguishing between closely related fungal species.