Mycoflora and Fumonisin Contamination in Brazilian Corn from Sowing to Harvest
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- 作者：Adriana P. Almeida ; Homero Fonseca ; Antô ; nio Luiz Fancelli ; Gló ; ria Maria Direito ; Edwin M. Ortega ; and Benedito Corrê ; a
- 刊名：Journal of Agricultural and Food Chemistry
- 出版年：2002
- 出版时间：June 19, 2002
- 年：2002
- 卷：50
- 期：13
- 页码：3877 - 3882
- 全文大小：117K
- 年卷期：v.50,no.13(June 19, 2002)
- ISSN：1520-5118
文摘
The present study aimed to analyze the mycoflora and potential mycotoxin contamination of soil andcorn samples collected at different plant maturity stages in Capão Bonito and Ribeirão Preto, tworegions of the State of São Paulo, Brazil. In addition, the data obtained were correlated with theoccurrence of wind-dispersed fungi and the predominant climatic conditions of the two regions studied.Corn mycoflora profiles showed that Fusarium verticillioides prevailed in 35% of the samples fromCapão Bonito and in 49% of the samples from Ribeirão Preto. Examination of wind-dispersed fungialso revealed a high incidence of F. verticillioides. Soil mycoflora analyses showed that Penicilliumwas the most prevalent genus, although F. verticillioides was present in 55.5% of Capão Bonito'ssamples and in 26.7% of Ribeirão Preto's samples. With respect to water activity, the corn kernelsmost contaminated with F. verticillioides had water activity levels of 0.70-0.80. HPLC analysis offumonisins revealed that 88.5% of Capão Bonito's kernels were contaminated with fumonisin B1 (FB1)(0.09-10.87 
g/g) and 53.8% with fumonisin B2 (FB2) (0.05-0.52 g/g); Ribeirão Preto's kernelspresented contamination levels of 93.5% for FB1 (0.11-17.69 g/g) and 61.3% for FB2 (0.05-5.24g/g). No aflatoxins were detected by thin-layer chromatography in corn grains of either region. Theconcomitant occurrence of F. verticillioides and fumonisins in most of the field corn assayeddemonstrates the importance of an effective control of cultivation throughout the plant maturity stages.Keywords: Mycoflora; aflatoxin; fumonisin; corn
g/g) and 53.8% with fumonisin B2 (FB2) (0.05-0.52 g/g); Ribeirão Preto's kernelspresented contamination levels of 93.5% for FB1 (0.11-17.69 g/g) and 61.3% for FB2 (0.05-5.24g/g). No aflatoxins were detected by thin-layer chromatography in corn grains of either region. Theconcomitant occurrence of F. verticillioides and fumonisins in most of the field corn assayeddemonstrates the importance of an effective control of cultivation throughout the plant maturity stages.Keywords: Mycoflora; aflatoxin; fumonisin; corn