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|Type:||Artigo de periódico|
|Title:||Accumulation of fumonisins B(1) and B(2) in freshly harvested Brazilian commercial maize at three locations during two nonconsecutive seasons|
|Abstract:||Fifty-six Brazilian commercial maize cultivars were examined for FB(1) and FB(2) accumulation after two nonconsecutive growing seasons. During the 94/95 growing season 35 cultivars were planted at three locations in the state of Sao Paulo, Brazil. All samples (total of 105) were contaminated (0.10 mug/g-6.58 mug/g FB(1) and 0.04 mug/g-2.15 mug/g FB(2)). During the 97/98 growing season, 8 of the cultivars used during 94/95 and 21 others were replanted at the same locations. All 87 samples were contaminated (1.15 mug/g-43.80 mug/g FB(1) and 0.08 mug/g-11.65 mug/g FB(2)). One cultivar accumulated significantly less fumonisins in all locations during both growing seasons, indicating that some degree of selection may be possible even in climates that favor F. moniliforme (verticillioides) infection of maize. The presence of water surplus in soil from kernel maturity to harvest correlated with concentrations of FB(1) in the grain for the 8 cultivars planted during both seasons at three locations. Observed trends indicated that water excesses and deficits from silking to harvest increased fumonisin levels. The difference in the incidence of FB(1), FB(2), and FB(1) + FB(2) was significant between growing seasons, planting locations and between cultivars. Neither the level of hybridization, nor the type of endosperm, nor the length of the vegetative cycle showed any effect on the FB(1) contamination.|
|Appears in Collections:||Unicamp - Artigos e Outros Documentos|
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