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Metabolites of Monascus ruber in silages
Author(s) -
Schneweis I.,
Meyer K.,
Hörmansdorfer S.,
Bauer J.
Publication year - 2001
Publication title -
journal of animal physiology and animal nutrition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.651
H-Index - 56
eISSN - 1439-0396
pISSN - 0931-2439
DOI - 10.1046/j.1439-0396.2001.00300.x
Subject(s) - citrinin , monascus , chemistry , chromatography , rumen , food science , silage , zoology , fermentation , biology , mycotoxin
A total of 233 silages were examined and found that Monascus ruber was present in 43 samples with counts between 1 × 10 3 and 9 × 10 6 colony‐forming units (CFU)/g (mean: 2 × 10 5 CFU/g). Monacolin K L and the hydroxy acid monacolin K A were detected by liquid chromatography‐mass spectrometry in 45 and 50 of 233 samples at levels ranging from 25–15 600 and 28–65 400 μ g/kg, respectively. Citrinin was found with high‐performance liquid chromatography‐fluorescence detection (FLD) in 14 (6%) samples, the concentrations varied between 2.4 and 64.2 μ g/kg. The concentrations of citrinin were low and toxic effects are not anticipated. Monacolin K A and monacolin K L occur frequently and in considerable amounts in silages. These metabolites are believed to influence the metabolic activity of rumen anaerobic fungi resulting in a poorer digestion of crude fibre.