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Unravelling Mycosphaerella: do you believe in genera?
P W Crous1, B A Summerell, A J Carnegie
1CBS-KNAW Fungal Biodiversity Centre, Uppsalalaan 8, 3584 CT Utrecht, The Netherlands;
Persoonia
|March 4, 2010
Summary
This study redefines fungal genera like Mycosphaerella using DNA sequencing, revealing distinct lineages and clarifying taxonomic relationships for better fungal classification.
Area of Science:
- Mycology
- Fungal Taxonomy
- Molecular Systematics
Background:
- Fungal genera are often based on limited morphological traits, leading to misclassifications due to convergent evolution.
- The genus Mycosphaerella, broadly defined, encompasses numerous unrelated taxa sharing similar phenotypic characteristics.
Purpose of the Study:
- To re-evaluate the taxonomic நிலை of the Mycosphaerellaceae family using DNA sequence data.
- To clarify the phylogenetic relationships within the order Capnodiales.
- To redefine the genus Mycosphaerella based on molecular evidence.
Main Methods:
- DNA sequencing of the LSU gene from various fungal isolates.
- Phylogenetic analysis to identify distinct clades and lineages.
- Comparison of molecular data with morphological characteristics.
Main Results:
- DNA sequencing revealed distinct clades within Mycosphaerellaceae, necessitating the redefinition of several genera.
- Mycosphaerella s.s. is proposed to include only taxa with Ramularia anamorphs.
- Other clades were linked to specific anamorphs, leading to the recognition of genera like Teratosphaeria and Schizothyrium.
Conclusions:
- The traditional, morphologically based classification of Mycosphaerella is inadequate.
- Molecular data provides a more robust framework for fungal taxonomy, resolving polyphyletic groups.
- Future studies are needed to define numerous new genera and families within the Capnodiales.
Keywords:
CibiessiaColletogloeumDissoconiumKirramycesMycosphaerellaPassaloraPenidiellaPhaeophleosporaPhaeothecoideaPseudocercosporaRamulariaReaderiellaStenellaTeratosphaeriaZasmidiumMore Related Videos
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