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首页> 美国卫生研究院文献>Toxins >A Novel Population of Fusariumfujikuroi Isolated from Southeastern U.S. Winegrapes Reveals the Need to Re-Evaluate the Species’ Fumonisin Production
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A Novel Population of Fusariumfujikuroi Isolated from Southeastern U.S. Winegrapes Reveals the Need to Re-Evaluate the Species’ Fumonisin Production

机译：镰刀菌的新种群从美国东南部葡萄酒葡萄中分离出的藤富士菌表明需要重新评估该物种伏马菌素的生产

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Mycotoxins pose a challenge to a safe food supply worldwide, and their threat is expected to worsen with our changing climate. The need for diligence is exemplified by the discovery of fumonisin B2 in wine, which joins ochratoxin A as a mycotoxin of concern in the grape-wine chain. To elucidate the mycotoxin risk in southeastern American wine, grape samples were collected from vineyards during harvest in 2013 and potentially mycotoxigenic fungi (Fusarium and Aspergillus) were isolated from the samples. Numerous Fusarium isolates were recovered and identified to the species level by comparison of translation elongation factor 1-α gene sequences to verified strains. Fusarium fujikuroi was the most abundant species recovered (239 isolates), followed by F. proliferatum (52), F. incarnatum-equiseti (14), F. oxysporum (7), F. concentricum (1), and F. solani (1). In vitro assays quantified fumonisin production for representative isolates via liquid chromatography-tandem mass spectrometry. Surprisingly, nearly all F. fujikuroi isolates produced fumonisins B1, B2, and B3 at levels comparable to both the F. proliferatum isolates and the positive control, Fusarium verticillioides. Such capacity for fumonisin production refutes the generally accepted notion that F. fujikuroi produces undetectable or low levels of fumonisins and provides evidence to reconsider this species as a mycotoxigenic threat to economically significant crops.
机译：霉菌毒素对全球的安全食品供应构成挑战，随着我们不断变化的气候，它们的威胁预计将进一步恶化。勤奋的需要体现在葡萄酒中的伏马菌素B2的发现中，它与曲霉毒素A一起成为葡萄-葡萄酒链中关注的霉菌毒素。为了阐明美国东南部葡萄酒的霉菌毒素风险，2013年收割期间从葡萄园中采集了葡萄样品，并从样品中分离出了潜在的产毒毒素真菌（F和曲霉）。通过将翻译延伸因子1-α基因序列与经过验证的菌株进行比较，回收了许多镰刀菌分离株并鉴定到物种水平。镰刀菌（Fusarium fujikuroi）是回收的最丰富的物种（239个分离株），其次是F. proliferatum（52），F。incarnatum-equiseti（14），oxysporum（7），F。concentricum（1）和F. solani（ 1）。体外测定通过液相色谱-串联质谱法对代表性分离物的伏马菌素产量进行了定量。出乎意料的是，几乎所有的富士果镰刀菌分离株都产生了伏马菌素B1，B2和B3，其水平与增生性镰刀菌分离株和阳性对照，镰孢镰刀菌（Fusarium v​​erticillioides）相当。这种生产伏马毒素的能力驳斥了公认的观念，即F. fujikuroi 会产生无法检测到的或水平较低的伏马毒素，并提供了重新考虑该物种对经济上重要的作物的致毒性威胁的证据。

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