Effect of water activity and temperature on growth and fumonisin B1 and B2 production by Fusarium proliferatum and F. moniliforme on maize grain |
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| Authors: | S Marin V Sanchis I Vinas R Canela N Magan |
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| Institution: | Food Technology Department, Lleida University, UdL-IRTA de Lleida, Lleida, Spain;Biotechnology Centre, Cranfield University, Cranfield, Bedford, UK |
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| Abstract: | S. MARIN, V. SANCHIS, I. VINAS, R. CANELA AND N. MAGAN. 1995. The effect of different water activities ( a w, 0.968, 0.956, 0.944, 0.925) and temperature (25°C and 30°C) on colonization and production of fumonisin B1 (FB1) and B2 (FB2) on sterile layers of maize by Fusarium proliferatum and F. moniliforme isolates was determined over periods of 6 weeks. Generally, both F. moniliforme and F. proliferatum grew faster with increasing a w and best at 30°C. All three isolates produced more FB 1 than FB2 regardless of a w or temperature. Very little FB1 and FB2 were produced at 0.925 a w, with maximum produced at 0.956 and 0.968 a w at both temperatures tested. Most FB1 and FB2 were produced by F. moniliforme (25N), followed by F. proliferatum isolates (73N and 131N). At all a w levels and both temperatures there was an increase in FB1 and FB2 concentration with time. Statistical analyses of a w, temperature, time, two- and three-way interactions showed some significant differences between isolates and FB1 and FB2 production. |
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