Alternaria mycotoxins in weathered wheat from China

Citation
Fq. Li et T. Yoshizawa, Alternaria mycotoxins in weathered wheat from China, J AGR FOOD, 48(7), 2000, pp. 2920-2924
Citations number
21
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Agricultural Chemistry","Chemistry & Analysis
Journal title
JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
ISSN journal
0021-8561 → ACNP
Volume
48
Issue
7
Year of publication
2000
Pages
2920 - 2924
Database
ISI
SICI code
0021-8561(200007)48:7<2920:AMIWWF>2.0.ZU;2-7
Abstract
This is the first report of the natural occurrence of Alternaria mycotoxins in Chinese wheat. Wheat kernels were significantly invaded by Alternaria s pecies, mostly A. alternata, with an average infection frequency of 87.3%. A total of 22 samples of weathered wheat kernels from the 1998 crop, repres enting three locations in the suburbs of Beijing, China, were examined for the presence of Alternaria mycotoxins by high-performance liquid chromatogr aphy. Alternariol (AOH) was detected in 20 of 22 samples ranging between 11 6 and 731 mu g/kg (mean = 335 mu g/kg) and alternariol methyl ether (AME) a t a mean level of 443 mu g/kg (range = 52-1426 mu g/kg) in 21 samples. The presence of tenuazonic acid (TA), a major Alternaria toxin in terms of quan tity, was detected in all samples analyzed at an average concentration of 2 419 mu g/kg with a maximum of 6432 mu g/kg. All samples were free from alte rtoxin I and altenuene. Samples with high levels of AOH and AME also contai n a high level of TA. There was significant linear regression of correlatio ns between the levels of AOH over AME (r = 0.850) and total benzopyrone der ivatives (AOH + AME) over TA (r = 0.796).