Jungsun Choi, Ju-Young Nah, Mi-Jeong Lee, Su-Bin Lim, Jangnam Choi, Theresa Lee, J. Jang, Jeomsoon Kim
{"title":"Occurrence of fungi and mycotoxins in peanuts during\n storage","authors":"Jungsun Choi, Ju-Young Nah, Mi-Jeong Lee, Su-Bin Lim, Jangnam Choi, Theresa Lee, J. Jang, Jeomsoon Kim","doi":"10.11002/kjfp.2022.29.7.1035","DOIUrl":null,"url":null,"abstract":"\n \n In this study, we investigated the occurrence of mycotoxigenic fungi and\n mycotoxins in stored peanuts. Two types of peanuts, with and without shell, were\n stored for 12 and 6 months, respectively and the kernels from each type of\n peanut were collected and analyzed bimonthly. The stored peanuts were mainly\n contaminated with Aspergillus, Penicillium,\n and Fusarium species along with at least 26 other genera.\n Fungal frequency increased exponentially to reach 79.1±20.3% at 12 months\n of storage for peanuts with shell, whereas it increased sharply to 100% at 2\n months for peanuts without shell. A. pseudoglaucus, A.\n chevalieri, and P. citrinum were prevalent in\n peanuts with shell, whereas A. flavus, P.\n crustosum, and P. polonicum were the most dominant\n species in peanuts without shell. Mycotoxin analysis revealed that ochratoxin A\n was detected in only one sample without shell (37.31\n μg/kg), while aflatoxins were not detected. Fungal\n isolates known for mycotoxin production were confirmed to be producing various\n levels of mycotoxins in potato dextrose agar medium. Among the tested isolates\n (n=129), 59 (45.7%) produced aflatoxins (0.82-1,213.60\n μg/kg), ochratoxin A (39.35-237.20\n μg/kg), patulin (1.21-803.76 mg/kg), or fumonisins\n (0.27-13.70 mg/kg). To our knowledge, this is the first report on mycotoxin\n production by A. westerdijkiae, A. niger,\n A. welwitschiae, A. tubingensis, and\n P. expansum isolates from Korean peanuts. Overall, these\n results demonstrate the potential risk of not only aflatoxin and ochratoxin A\n but also patulin and fumonisin contamination in stored peanuts.\n","PeriodicalId":17875,"journal":{"name":"Korean Journal of Food Preservation","volume":null,"pages":null},"PeriodicalIF":0.0000,"publicationDate":"2022-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Korean Journal of Food Preservation","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.11002/kjfp.2022.29.7.1035","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"Agricultural and Biological Sciences","Score":null,"Total":0}
引用次数: 0
Abstract
In this study, we investigated the occurrence of mycotoxigenic fungi and
mycotoxins in stored peanuts. Two types of peanuts, with and without shell, were
stored for 12 and 6 months, respectively and the kernels from each type of
peanut were collected and analyzed bimonthly. The stored peanuts were mainly
contaminated with Aspergillus, Penicillium,
and Fusarium species along with at least 26 other genera.
Fungal frequency increased exponentially to reach 79.1±20.3% at 12 months
of storage for peanuts with shell, whereas it increased sharply to 100% at 2
months for peanuts without shell. A. pseudoglaucus, A.
chevalieri, and P. citrinum were prevalent in
peanuts with shell, whereas A. flavus, P.
crustosum, and P. polonicum were the most dominant
species in peanuts without shell. Mycotoxin analysis revealed that ochratoxin A
was detected in only one sample without shell (37.31
μg/kg), while aflatoxins were not detected. Fungal
isolates known for mycotoxin production were confirmed to be producing various
levels of mycotoxins in potato dextrose agar medium. Among the tested isolates
(n=129), 59 (45.7%) produced aflatoxins (0.82-1,213.60
μg/kg), ochratoxin A (39.35-237.20
μg/kg), patulin (1.21-803.76 mg/kg), or fumonisins
(0.27-13.70 mg/kg). To our knowledge, this is the first report on mycotoxin
production by A. westerdijkiae, A. niger,
A. welwitschiae, A. tubingensis, and
P. expansum isolates from Korean peanuts. Overall, these
results demonstrate the potential risk of not only aflatoxin and ochratoxin A
but also patulin and fumonisin contamination in stored peanuts.
期刊介绍:
This journal aims to promote and encourage the advancement of quantitative improvement for the storage, processing and distribution of food and its related disciplines, theory and research on its application. Topics covered include: Food Preservation and Packaging Food and Food Material distribution Fresh-cut Food Manufacturing Food processing Technology Food Functional Properties Food Quality / Safety.