Abstract
The neutral sugars and amino sugars, released by acid hydrolysis of walls and polysaccharidic fractions, of six species of Talaromyces and the infrared spectra have been used to study their interspecific relationships. In whole cell walls neutral sugars ranged from 23 to 39.6% dry weight and were identified as glucose, galactose and mannose. Glucosamine varied from 8 to 19.8% in the samples. Galactosamine (2% or less) was found in T. emersonii and T. rotundus and no galactosamine in the other species. Sequential fractionation of the cell walls with alkali and acid gave several polysaccharidic fractions. The main differences among species were found in the alkali-soluble fraction at 20° (F1). This fraction represented 8 to 33.2% of the whole cell wall and was characterized as an α-glucan in T. bacillisporus, T. emersonii, T. luteus and T. rotundus (Group A) and as a β-galactofuranosyl containing glucan in T. ohiensis and T. stipitatus (Group B). The alkali-insoluble residue (F4) represented the bulk of the cell wall in all species tested (33.2% to 57.3%) and was characterized as a β-glucan/chitin complex. The results may indicate degrees of interspecific relationship in the genus Talaromyces.
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Abbreviations
- CWM:
-
cell wall material
- GLC:
-
gas-liquid chromatography
- IR:
-
infrared
- wt:
-
weight
- CBS:
-
Centraal Bureau voor Schimmelcultures (Baarn. The Netherlands)
- Ara:
-
arabinose
- Xyl:
-
xylose
- Man:
-
mannose
- Gal:
-
galactose
- Glc:
-
glucose
- GlcNH2 :
-
glucosamine
- GalNH2 :
-
galactosamine
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Rupérez, P., Moya, A. & Leal, J.A. Cell wall polysaccharides from Talaromyces species. Arch. Microbiol. 146, 250–255 (1986). https://doi.org/10.1007/BF00403225
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DOI: https://doi.org/10.1007/BF00403225