Studies on toxigenic fungi in roasted foodstuff (salted seed) and halotolerant activity of emodin-producing Aspergillus wentii
Jazyk angličtina Země Spojené státy americké Médium print
Typ dokumentu časopisecké články
PubMed
9821293
DOI
10.1007/bf02818578
Knihovny.cz E-zdroje
- MeSH
- Aspergillus účinky léků růst a vývoj izolace a purifikace metabolismus MeSH
- chlorid sodný farmakologie MeSH
- emodin metabolismus MeSH
- kultivační média MeSH
- manipulace s potravinami MeSH
- mitosporické houby účinky léků růst a vývoj izolace a purifikace metabolismus MeSH
- mykotoxiny biosyntéza toxicita MeSH
- potravinářská mikrobiologie * MeSH
- semena rostlinná mikrobiologie fyziologie MeSH
- vztah mezi dávkou a účinkem léčiva MeSH
- Publikační typ
- časopisecké články MeSH
- Názvy látek
- chlorid sodný MeSH
- emodin MeSH
- kultivační média MeSH
- mykotoxiny MeSH
Commercial roasted salted peanuts (3% NaCl), popcorn (1% NaCl), summer-squash (9% NaCl), sunflower (3% NaCl) and wild-melon (3% NaCl) seeds are polluted with fungi, mostly Aspergillus flavus, A. niger, Penicillium chrysogenum, P. corylophilum and Rhizopus stolonifer. Contamination of popcorn with the fungi is about 10 times higher than in the other foods. These fungi, common also on unsalted seeds, are significantly inhibited in seeds (30% moisture content) treated with 9-21% NaCl. The halotolerant A. wentii represents the main fungus recovered from seeds treated by 15-21% NaCl. 9% NaCl stimulated emodin production by A. wentii on peanut and citrinin production by P. chrysogenum on popcorn and sunflower. Aflatoxin, citrinin and emodin production on popcorn persisted up to 15% NaCl. Popcorn is thus strongly susceptible to fungal invasion and toxin pollution. The halotolerance of A. wentii was confirmed by its strong permanent growth in liquid medium at up to 15% NaCl. At 3% NaCl the mycelial growth and nitrogen content increased while the level of emodin and lipid production decreased. CO2 evolution strongly increased at 9-15% NaCl as a characteristic of A. wentii salt tolerance. Emodin inhibited seed viability and the inhibition dose for 50% reduction (LD50) was 65 mg/L for popcorn and 45 mg/L for sunflower.
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Mycopathologia. 1989 Sep;107(2-3):153-9 PubMed
Mycopathologia. 1987 Jun;98(3):165-70 PubMed
Appl Environ Microbiol. 1977 Apr;33(4):1004-6 PubMed
J Food Prot. 1995 Sep;58(9):1018-1022 PubMed
Experientia. 1981 Jan 15;37(1):16-7 PubMed
Anal Biochem. 1973 Apr;52(2):482-8 PubMed
Folia Microbiol (Praha). 1965 Jul;10:215-23 PubMed
J Food Prot. 1986 Nov;49(11):880-885 PubMed
Appl Microbiol. 1975 Jul;30(1):26-8 PubMed
Lloydia. 1975 Jan-Feb;38(1):21-35 PubMed
J Food Prot. 1995 Sep;58(9):1014-1017 PubMed
J Dairy Sci. 1972 Oct;55(10):1415-9 PubMed
