中文摘要：测定赞比亚三个农业生态区的玉米和花生中的黄曲霉毒素，一类与发育迟缓和免疫抑制有关的强致癌物质，并确定购买后因黄曲霉毒素增加造成的易损性。研究发现赞比亚主食中普遍存在黄曲霉毒素，污染比例因农业生态区而异。真菌群落的结构影响其污染，表明赞比亚将从生物防除黄曲霉中受益。本研究详述了赞比亚三个农业生态区的黄曲霉污染情况，并提供了用不产毒生物防除剂管理黄曲霉毒素的案例。本文首次提出了评估购买后黄曲霉毒素增加的潜能的方法。
外文摘要：AIMS: Quantify aflatoxins, the potent carcinogens associated with stunting and immune suppression, in maize and groundnut across Zambia's three agroecologies and determine vulnerability to aflatoxin increases after purchase. METHODS AND RESULTS: Aflatoxin concentrations were determined for 334 maize and groundnut samples from 27 districts using lateral-flow immunochromatography. Seventeen percent of crops from markets contained aflatoxin concentrations above allowable levels in Zambia (10 μg kg-1 ). Proportions of crops unsafe for human consumption differed significantly (P-1 ) and maize (16 μg kg-1 ) differed (P=0.032). Poor storage (31°C, 100% RH, 1 week) increased aflatoxin in safe crops by over 1,000 fold in both maize and groundnut. The L morphotype of A. flavus was negatively correlated with post-harvest increases in groundnut. CONCLUSIONS: Aflatoxins are common in Zambia's food staples with proportions of unsafe crops dependent on agroecology. Fungal community structure influences contamination suggesting Zambia would benefit from biocontrol with atoxigenic A. flavus. SIGNIFICANCE AND IMPACT OF STUDY: Aflatoxin contamination across the three agroecologies of Zambia are detailed and the case for aflatoxin management with atoxigenic biocontrol agents provided. The first method for evaluating the potential for aflatoxin increase after purchase is presented.
外文关键词：aflatoxin；agroecologies；Aspergillus section Flavi；groundnut；maize；Zambia
作者：Kachapulula, PW；Akello, J；Bandyopadhyay, R；Cotty, PJ
作者单位：Univ Arizona
期刊名称：JOURNAL OF APPLIED MICROBIOLOGY
期刊影响因子：2.156
出版年份：2017
出版刊次：6
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