Influence of water activity on Penicillium citrinum growth and kinetics of citrinin accumulation in wheat
The influence of water activity (a(w)) on both Penicillium citrinum growth and citrinin accumulation in wheat was studied. Wheat conditioned at different levels of a(w) and inoculated with a citrinin producer strain was incubated at 30°C for 2 months. Fungal growth was assessed by microscopic examin...
Guardado en:
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1998
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| Acceso en línea: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_01681605_v42_n3_p219_Comerio http://hdl.handle.net/20.500.12110/paper_01681605_v42_n3_p219_Comerio |
| Aporte de: |
| Sumario: | The influence of water activity (a(w)) on both Penicillium citrinum growth and citrinin accumulation in wheat was studied. Wheat conditioned at different levels of a(w) and inoculated with a citrinin producer strain was incubated at 30°C for 2 months. Fungal growth was assessed by microscopic examination. P. citrinum grew down to a, 0.775. Citrinin was not detected in the substrate at a(w) 0.800 and lower. As a(w) increased the toxin was detected earlier and the maximum accumulation increased markedly (65 μg/kg a(w) 0.810, 460 μg/kg at a(w) 0.825 and 22 mg/kg at a(w) 0.885). Citrinin concentration declines rapidly after reaching the maximum at each a(w) level. |
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