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首页> 外文期刊>Food microbiology >Significance of Asperglllus niger aggregate species as contaminants of food products in Spain regarding their occurrence and their ability to produce mycotoxins
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Significance of Asperglllus niger aggregate species as contaminants of food products in Spain regarding their occurrence and their ability to produce mycotoxins

机译：Asperglllus niger综合物种作为西班牙食品污染物的意义及其生产霉菌毒素的能力

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摘要

The Aspergillus niger aggregate contains 15 morphologically indistinguishable species which presence is related to ochratoxin A (OTA) and fumonisin B-2 (FB2) contamination of foodstuffs. The taxonomy of this group was recently reevaluated and there is a need of new studies regarding the risk that these species might pose to food security. 258 isolates of A. niger aggregate obtained from a variety of products from Spain were classified by molecular methods being A. tubingensis the most frequently occurring (67.5%) followed by A. welwitschiae (19.4%) and A. niger (11.7%). Their potential ability to produce mycotoxins was evaluated by PCR protocols which allow a rapid detection of OTA and FB2 biosynthetic genes in their genomes. OTA production is not widespread in A. niger aggregate since only 17% of A. niger and 6% of A. welwitschiae isolates presented the complete biosynthetic cluster whereas the lack of the cluster was confirmed in all A. tubingensis isolates. On the other hand, A. niger and A. welwitschiae seem to be important FB2 producers with 97% and 29% of the isolates, respectively, presenting the complete cluster. The genes involved in OTA and FB2 were overexpressed in producing isolates and their expression was related to mycotoxin synthesis.
机译：Aspergillus niger骨料含有15种，存在与Ochratoxin A（OTA）和Fumonisin B-2（FB2）污染有关食品的污染物。该群体的分类物最近重新评估，需要新的研究，这些物种可能对粮食安全构成的风险。从西班牙各种产品中获得的A.尼日尔骨料的分离物被分子方法分类为A. Tubingensis最常发生（67.5％），然后是A. Welwitschiae（19.4％）和A.Niger（11.7％）。通过PCR方案评估其产生霉菌毒素的潜在能力，其允许在其基因组中快速检测OTA和FB2生物合成基因。 OTA生产并不普遍存在A.Niger汇总以来，只有17％的A.Niger和6％的A.WeLwitschiae分离株，而群体缺乏群体在所有A.管道分离物中得到证实。另一方面，A.尼日尔和A. Welwitschiae似乎是一个重要的FB2生产商，分别是97％和29％的分离物，呈现完整的集群。参与OTA和FB2的基因在产生分离物中过表达，其表达与霉菌毒素合成有关。

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  • 来源
    《Food microbiology》 |2019年第9期|240-248|共9页
  • 作者

    Gil-Serna Jessica; Garcia-Diaz Marta; Vazquez Covadonga; Gonzalez-Jaen Maria Teresa; Patino Belen;

  • 作者单位

    Univ Complutense Madrid Fac Biol Dept Genet Physiol & Microbiol Jose Antonio Novais 12 Madrid 28040 Spain;

    Univ Complutense Madrid Fac Biol Dept Genet Physiol & Microbiol Jose Antonio Novais 12 Madrid 28040 Spain;

    Univ Complutense Madrid Fac Biol Dept Genet Physiol & Microbiol Jose Antonio Novais 12 Madrid 28040 Spain;

    Univ Complutense Madrid Fac Biol Dept Genet Physiol & Microbiol Jose Antonio Novais 12 Madrid 28040 Spain;

    Univ Complutense Madrid Fac Biol Dept Genet Physiol & Microbiol Jose Antonio Novais 12 Madrid 28040 Spain;

  • 收录信息 美国《科学引文索引》(SCI);美国《化学文摘》(CA);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Ochratoxin A; Fumonisins; Food safety; Section Nigri;

    机译：Ochratoxin a;fumonisins;食品安全;部分nigri;

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