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Toxins 2017, 9(1), 40; doi:10.3390/toxins9010040

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

1
Institute of Food Science and Technology, Chinese Academy of Agricultural Sciences/Key Laboratory of Agro-Products Processing, Ministry of Agriculture, Beijing 100193, China
2
Shandong Peanut Research Institute, Qingdao 266100, China
3
Qingdao Agricultural University, Qingdao 266109, China
Present address: The College of Life Sciences, Hubei University, Wuhan 430062, China.
*
Author to whom correspondence should be addressed.
Academic Editor: Carlo Brera
Received: 25 October 2016 / Revised: 5 January 2017 / Accepted: 6 January 2017 / Published: 20 January 2017
(This article belongs to the Special Issue Exposure and Risk Assessment for Mycotoxins)
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Abstract

Peanut pods are easily infected by aflatoxin-producing Aspergillus sp.ecies 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 AFB1 contamination on peanut was in YZR which had the largest number of AFB1 producing isolates in 1g soil, followed by SEC and YR, and the lowest was NE. The potential risk of AFB1 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. View Full-Text
Keywords: aflatoxin B1; aflatoxin-producing Aspergillus; peanut soils; China aflatoxin B1; aflatoxin-producing Aspergillus; peanut soils; China
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Zhang, C.; Selvaraj, J.N.; Yang, Q.; Liu, Y. A Survey of Aflatoxin-Producing Aspergillus sp. from Peanut Field Soils in Four Agroecological Zones of China. Toxins 2017, 9, 40.

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