Separation of closely related asymmetric Penicillia by pyrolysis-gas chromatography and mycotoxin production
Söderström, Bengt; Frisvad, J.C. (1984). Separation of closely related asymmetric Penicillia by pyrolysis-gas chromatography and mycotoxin production. Mycologia, 76, (3), 408 - 419
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Published
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English
Authors:
Söderström, Bengt
;
Frisvad, J.C.
Department:
MEMEG
Microbial Ecology
Research Group:
Microbial Ecology
Abstract:
The relationships among nine different isolates of Penicillium crustosum were studied by pyrolysis-gas chromatography (Py-GC) coupled with a pattern recognition analysis (PR). The results obtained were compared to mycotoxin production profiles of the isolates. Based on the Py-GC analyses the isolates could be divided into two well-differentiated groups, and one of these groups could be further subdivided. Based on mycotoxin analyses the isolates could be divided into three groups: one group (P. crustosum sensu stricto) in which the fungi produced penitrem A, roquefortine C, and terrestric acid, one group ("P. caseiphilum" = P. camembertii group II) producing cyclopiazonic acid, and a third group ("P. melanochlorum" = P. mali) with isolates producing none of these toxins. Basically, the Py-GC-PR grouping agreed with the mycotoxin profile grouping, although the agreement was not perfect. The taxonomic treatment of these strains as one species thus seems unsatisfactory. The Py-GC-PR method appears to be quite useful as one aid in establishing criteria for studies of relationships between related fungi.
Keywords:
Penicillium crustosum ;
mycotoxins ;
pyrolysis-GC ;
classification
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