Publication Date
1989
Description
Insufficient growth of lambs grazed on lowland mires in Iceland is well documented but not clearly understood (Gudmundsson, 1988). It is also well established world wide that toxic substances which occur on grassland pastures can cause ruminal disorder and retard animal growth (Culvenor, 1987). Such toxins may be inorganic in nature, but more frequently, they are organic metabolites, for example fungal toxins either on the topsoil either on or within the plant. In Nova Scotia, Canada, where ill-thrift is common, researches have confirmed an interaction between fungal flora of soils and metabolism of rumen bacteria (Brewer et al., 1979; Liss et al., 1985). A research project was carried out in Iceland to obtain information of the fungal flora of Icelandic pastures (Brewer et al., 1988). Systematic survey of the soil and herbage fungi of a lowland mire pasture and screening tests against cellulolysis by rumen bacteria was conducted. Out of 91 isolates, 10 inhibited cellulolysis and 9 of these were of the Paecilomyces carneus species known to produce penicillin N (Brewer et al., 1972). The present work is a first step, to examine whether penicillin like metabolites in extract from P. carneus fungi would affect digestibility of herbage from pastures and therefore the performance of grazing animals in Iceland.
Citation
Eiriksson, T; Gudmundsson, O; Olafsson, S; and Taylor, A, "Inhibitory Effect of Penicillin like Metabolites of Paecilomyces carneus on In vitro Dry Matter Digestibility of Grasses" (2025). IGC Proceedings (1989-2023). 54.
https://uknowledge.uky.edu/igc/1989/session7/54
Included in
Agricultural Science Commons, Agronomy and Crop Sciences Commons, Plant Biology Commons, Plant Pathology Commons, Soil Science Commons, Weed Science Commons
Inhibitory Effect of Penicillin like Metabolites of Paecilomyces carneus on In vitro Dry Matter Digestibility of Grasses
Insufficient growth of lambs grazed on lowland mires in Iceland is well documented but not clearly understood (Gudmundsson, 1988). It is also well established world wide that toxic substances which occur on grassland pastures can cause ruminal disorder and retard animal growth (Culvenor, 1987). Such toxins may be inorganic in nature, but more frequently, they are organic metabolites, for example fungal toxins either on the topsoil either on or within the plant. In Nova Scotia, Canada, where ill-thrift is common, researches have confirmed an interaction between fungal flora of soils and metabolism of rumen bacteria (Brewer et al., 1979; Liss et al., 1985). A research project was carried out in Iceland to obtain information of the fungal flora of Icelandic pastures (Brewer et al., 1988). Systematic survey of the soil and herbage fungi of a lowland mire pasture and screening tests against cellulolysis by rumen bacteria was conducted. Out of 91 isolates, 10 inhibited cellulolysis and 9 of these were of the Paecilomyces carneus species known to produce penicillin N (Brewer et al., 1972). The present work is a first step, to examine whether penicillin like metabolites in extract from P. carneus fungi would affect digestibility of herbage from pastures and therefore the performance of grazing animals in Iceland.
