A Survey of Aflatoxin-Producing Aspergillus sp from Peanut Field Soils in Four Agroecological Zones of China

文献类型： 外文期刊

第一作者： Zhang, Chushu

作者： Zhang, Chushu;Selvaraj, Jonathan Nimal;Liu, Yang;Zhang, Chushu;Yang, Qingli;Selvaraj, Jonathan Nimal

作者机构：

关键词： aflatoxin B-1;aflatoxin-producing Aspergillus;peanut soils;China

期刊名称：TOXINS （ 影响因子：4.546； 五年影响因子：4.8 ）

ISSN： 2072-6651

年卷期： 2017 年 9 卷 1 期

页码：

收录情况： SCI

摘要： Peanut pods are easily infected by aflatoxin-producing Aspergillus species from field soil. To assess the aflatoxin-producing Aspergillus sp. in different peanut field soils, 344 aflatoxin-producing Aspergillus strains were isolated from 600 soil samples of four agroecological zones in China (the Southeast coastal zone (SEC), the Yangtze River zone (YZR), the Yellow River zone (YR) and the Northeast zone (NE)). Nearly 94.2% (324/344) of strains were A. flavus and 5.8% (20/344) of strains were A. parasiticus. YZR had the highest population density of Aspergillus sp. and positive rate of aflatoxin production in isolated strains (1039.3 cfu.g(-1), 80.7%), the second was SEC (191.5 cfu.g(-1), 48.7%), the third was YR (26.5 cfu.g(-1), 22.7%), and the last was NE (2.4 cfu.g(-1), 6.6%). The highest risk of AFB(1) contamination on peanut was in YZR which had the largest number of AFB(1) producing isolates in 1g soil, followed by SEC and YR, and the lowest was NE. The potential risk of AFB(1) contamination in peanuts can increase with increasing population density and a positive rate of aflatoxin-producing Aspergillus sp. in field soils, suggesting that reducing aflatoxigenic Aspergillus sp. in field soils could prevent AFB1 contamination in peanuts.

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