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Digitale Medien

Survey of the genus penicillium for tremorgenic toxin production (1970)

Ciegler, A. ; Pitt, J. I.

Springer

Mycopathologia 42 (1970), S. 119-124

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ISSN: 1573-0832

Quelle: Springer Online Journal Archives 1860-2000

Thema: Biologie , Medizin

Beschreibung / Inhaltsverzeichnis: Zusammenfassung Eine vorläufige Übersicht der GattungPenicillium zeigt, daß die Erzeugung eines tremorgenischen Toxins an gewisse Arten der Subsektion Fasciculata, Section Asymmetrica beschränkt ist. Die kräftigste Toxinsynthesis war inP. crustosum, P. cyclopium P. granulatum, undP. palitans beobachtet.

Notizen: Abstract A preliminary survey of the genusPenicillium reveals that production of a trem-orgenic toxin is confined to certain species of the Subsection Fasciculata, Section Asymmetrica. The most intense toxin synthesis was noted in strains ofP. crustosum, P. cyclopium, P. grannulatum, andP. palitans.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1007/BF02051832

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Digitale Medien

Speciation in the yeast genusMetschnikowia (1970)

Pitt, J. I. ; Miller, M. W.

Springer

Antonie van Leeuwenhoek 36 (1970), S. 357-381

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ISSN: 1572-9699

Quelle: Springer Online Journal Archives 1860-2000

Thema: Biologie

Notizen: Abstract Genetic studies were employed to rationalize speciation in the yeast genusMetschnikowia. Using haploid cultures derived parasexually or from isolated single ascospores, hybrids were produced between mostMetschnikowia taxa. The results provided strong evidence for the acceptance ofM. bicuspidata as type of the genus, and enabled clarification of the relationships among the recognized species. Speciation was based primarily on ascus and ascospore morphology, as classification based on physiological properties was shown to be ineffective.Metschnikowia bicuspidata var.californica var. nov. is described, and some possible evolutionary trends are discussed.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1007/BF02069037

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Digitale Medien

Trichosporonoides nigrescens sp. nov., a new xerophilic yeast-like fungus (1981)

Hocking, Ailsa D. ; Pitt, J. I.

Springer

Antonie van Leeuwenhoek 47 (1981), S. 411-421

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ISSN: 1572-9699

Quelle: Springer Online Journal Archives 1860-2000

Thema: Biologie

Notizen: Abstract A new yeast-like fungus isolated from jam on two occasions is described as Trichosporonoides nigrescens. It is a true xerophile, able to grow at water activities at least as low as 0.75. For this reason, its carbon assimilation pattern was examined using both dilute (standard) and concentrated carbon sources: six to nine compounds not assimilated at the standard concentrations of 0.5% (0.001 to 0.1 mol/kg) were assimilated at 1.5 to 2.0 mol/kg. Cell wall and septal ultrastructure, DNA base ratios, and the nuclear cycle were examined to determine the generic and higher taxonomic affinities of this microorganism. All properties were consistent with its assignment to Trichosporonoides Haskins et Spencer. However, while ultrastructure indicated an affinity with the Basidiomycetes, the mitotic nuclear cycle and the xerophilic nature of this fungus suggested an Ascomycete affinity. The GC content (57%) is consistent with assignment to either. No teleomorphic state was found.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1007/BF00426003

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