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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：黑曲霉聚集体物种作为西班牙食品污染物的重要性，因为它们的发生及其产生霉菌毒素的能力

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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：黑曲霉的聚集体包含15种形态上无法区分的物种，其存在与食品的曲霉毒素A（OTA）和伏马菌素B-2（FB2）污染有关。最近对该类的分类进行了重新评估，需要对这些物种可能对粮食安全构成的风险进行新的研究。从西班牙的多种产品中获得的黑曲霉聚集体的258种分离物通过分子方法进行了分类，其中最常见的是油曲霉（67.5％），其次是细角曲霉（19.4％）和黑曲霉（11.7％）。通过PCR方案评估了它们产生霉菌毒素的潜在能力，该方案可以快速检测其基因组中的OTA和FB2生物合成基因。由于黑曲霉菌株和黑曲霉菌株中只有17％和完整的生物合成簇呈现出完整的生物合成簇，因此在所有黑曲霉中，OTA的产生并不普遍，而在所有的油曲霉菌株中都证实了该簇的缺乏。另一方面，黑曲霉和and曲霉似乎是重要的FB2产生者，分别具有97％和29％的分离株，呈现完整的簇。 OTA和FB2涉及的基因在生产分离株中过表达，其表达与霉菌毒素的合成有关。

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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：ch曲霉毒素A;烟熏菌素;食品安全性;尼格里节;

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