Journal
JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
Volume 63, Issue 1, Pages 335-342Publisher
AMER CHEMICAL SOC
DOI: 10.1021/jf504702z
Keywords
sweetpotato; furanoterpenoids; ipomeamarone; animal and human health safety; Rhizopus stolonifer
Funding
- Rockefeller Foundation
- United States Agency for International Development
- Bill and Melinda Gates Foundation
- National Science Foundation [DMR-1157490]
- State of Florida
- NIH [S10RR031637]
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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.
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