A strain of Aspergillus flavus from China shows potential as a biocontrol agent for aflatoxin contamination
文献类型: 外文期刊
第一作者: Zhou, Lu
作者: Zhou, Lu;Wei, Dan-Dan;Selvaraj, Jonathan Nimal;Shang, Bo;Zhang, Chu-Shu;Xing, Fu-Guo;Zhao, Yue-Ju;Wang, Yan;Liu, Yang
作者机构:
关键词: aflatoxin;Aspergillus flavus;atoxigenic strain;aflatoxin gene cluster;biocontrol
期刊名称:BIOCONTROL SCIENCE AND TECHNOLOGY ( 影响因子:1.665; 五年影响因子:1.616 )
ISSN:
年卷期:
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收录情况: SCI
摘要: Aflatoxins are toxic and carcinogenic secondary metabolites produced by Aspergillus flavus and Aspergillus parasiticus. Strains of A. flavus that are non-aflatoxigenic (i.e., incapable of secreting aflatoxins) have proven effective in controlling contamination by these aflatoxin producing species in the field. In the present study, a non-aflatoxigenic A. flavus strain, GD-3, was isolated from a peanut field in Guangdong Province, China. Polymerase chain reaction (PCR) analysis showed that 12 aflatoxin biosynthesis genes (aflT, pksA, nor-1, fas-2, fas-1, aflR, aflJ, adhA, estA, norA, ver-1 and verA) were deleted in GD-3. Co-inoculation with a toxigenic strain, GD-15, at the ratio of 1: 10, 1: 1 or 10: 1 (GD-3: GD-15), showed that GD-3 was capable of reducing detectable aflatoxin levels on three different substrates. This reduction ranged from 33% to 99% and correlated with competitor ratio. These results demonstrated that GD-3 was successful at reducing aflatoxin contamination and showed promise as a potential agent of biocontrol for local farmers.
分类号: S476
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