Wamalwa Lydia N, Cheseto Xavier, Ouna Elizabeth, Kaplan Fatma, Maniania Nguya K, Machuka Jesse, Torto Baldwyn, Ghislain Marc
J Agric Food Chem. 2015 Jan 14;63(1):335-42. doi: 10.1021/jf504702z.
Furanoterpenoid accumulation in response to microbial attack in rotting sweetpotatoes has long been linked to deaths and lung edema of cattle in the world. However, it is not known whether furanoterpenoid ipomeamarone accumulates in the healthy-looking parts of infected sweetpotato storage roots. This is critical for effective utilization as animal feed and assessment of the potential negative impact on human health. Therefore, we first identified the fungus from infected sweetpotatoes as a Rhizopus stolonifer strain and then used it to infect healthy sweetpotato storage roots for characterization of furanoterpenoid content. Ipomeamarone and its precursor, dehydroipomeamarone, were identified through spectroscopic analyses, and detected in all samples and controls at varying concentrations. Ipomeamarone concentration was at toxic levels in healthy-looking parts of some samples. Our study provides fundamental information on furanoterpenoids in relation to high levels reported that could subsequently affect cattle on consumption and high ipomeamarone levels in healthy-looking parts.
长期以来，人们一直认为腐烂红薯中因微生物侵袭而积累的呋喃萜类化合物与世界各地牛的死亡和肺水肿有关。然而，目前尚不清楚呋喃萜类化合物甘薯黑疤霉酮是否会在受感染甘薯贮藏根外观正常的部分积累。这对于作为动物饲料的有效利用以及评估对人类健康的潜在负面影响至关重要。因此，我们首先从受感染的红薯中鉴定出这种真菌为匍枝根霉菌株，然后用它感染健康的甘薯贮藏根，以表征呋喃萜类化合物的含量。通过光谱分析鉴定出甘薯黑疤霉酮及其前体脱氢甘薯黑疤霉酮，并在所有样品和对照中检测到不同浓度的它们。在一些样品外观正常的部分，甘薯黑疤霉酮浓度处于有毒水平。我们的研究提供了与高水平呋喃萜类化合物相关的基础信息，这些高水平的呋喃萜类化合物随后可能会影响牛的食用，并在外观正常的部分含有高浓度的甘薯黑疤霉酮。
