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This report demonstrates the striking variability of mitochondria within and between different species of fungi from all major taxa, i.e., Oomycetes ( Phytophthora erythroseptica ), Zygomycotina ( Basidiobolus ranarum, Mucor mucedo ), Ascomycotina ( Sordaria fimicola ), Deuteromycotina ( Botrytis cinerea, Fusarium culmorum ) and Basidiomycotina ( Schizophyllum commune ). For light microscopy (LM), a simple procedure was used to highlight mitochondria in living hyphae. They appeared filamentous, sometimes exceeding 25 m in length, and were occasionally branched. Ultrastructural features were investigated by transmission electron microscopy (TEM) which revealed that mitochondria of P. erythroseptica and B. ranarum had tubular cristae whereas the cristae in all other species were lamellate. The value of mitochondrial ultrastructure as a tool for fungal phylogenetic analysis is discussed. |
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