中文摘要：玉米是最重要的经济作物之一，在世界各地特别是热带和亚热带国家广泛栽培。它极易受真菌产生的有毒次生代谢物霉菌毒素的影响。本研究评估了巴西刚收获的玉米中黄曲霉毒素污染及曲霉菌的存在情况。对所有的黄曲霉进行了分子检测，结果发现它们属于6个种类，包括novoparasiticus、arachidicola和pseudocaelatus曲霉，全是黄曲霉毒素B和G的产毒菌，本文首次报道该三种曲霉污染玉米粒。
外文摘要：Maize is one of the most important commercial crops cultivated throughout the world, mostly in tropical and subtropical countries. It is highly susceptible to mycotoxins, toxic secondary metabolites produced by fungi. In this study, we assessed freshly harvested corn produced in Brazil for aflatoxin contamination and the presence of Aspergillus. B type aflatoxins (AFB1 + AFB2) were detected in 56% of 16 grain samples, while G type aflatoxins (AFG1 + AFG2) were detected in 25%. Of the total number of grains (n = 1920) evaluated for the presence of fungi species, 4.7% were infected with Aspergillus species, 74.5% and 16.7% respectively with Fusarium and Penicillium species and 4.1% with other fungi genera. In total, 89 Aspergillus isolates were identified, most (86 isolates) characterized as belonging to Aspergillus section Flavi, and the remainder to Aspergillus section Cremei (2 isolates) and Aspergillus section Terrei (1 isolate). All the isolates of section Flavi were subjected to molecular analysis. They were found to belong to six species, including Aspergillus novoparasiticus, Aspergillus arachidicola and Aspergillus pseudocaelatus, all aflatoxins B and G producing species, which are herein described for the first time infecting corn kernels.
外文关键词：Aflatoxins；Aspergillus identification；Aspergillus section Flavi；Corn contamination
作者：Viaro, HP；da Silva, JJ；Ferranti, LD；Bordini, JG；Massi, FP；Fungaro, MHP
作者单位：Univ Estadual Londrina
期刊名称：INTERNATIONAL JOURNAL OF FOOD MICROBIOLOGY
期刊影响因子：3.445
出版年份：2017
出版刊次：2
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