期刊
INTERNATIONAL JOURNAL OF FOOD MICROBIOLOGY
卷 166, 期 1, 页码 135-140出版社
ELSEVIER
DOI: 10.1016/j.ijfoodmicro.2013.06.029
关键词
Fusarium graminearum; Fusarium asiaticum; Multilocus genotyping; Tebuconazole; Aggressiveness; Nivalenol
资金
- Comision Sectorial de Investigacion Cientifica (CSIC, Uruguay)
- Agencia Nacional de Investigacion e Innovacion (ANII, Uruguay)
Members of the Fusarium graminearum species complex (FGSC) are the primary cause of Fusarium head blight (FHB) of wheat, and frequently contaminate grain with trichothecene mycotoxins that pose a serious threat to food safety and animal health. The species identity and trichothecene toxin potential of 151 FGSC isolates collected from wheat in Uruguay were determined via multilocus genotyping. Although F. graminearum with the 15ADON trichothecene type accounted for 86% of the isolates examined, five different FGSC species and all three trichothecene types were identified in this collection. This is the first report of Fusarium asiaticurn, Fusarium brasilicum, Fusarium cortaderiae, and Fusarium austroamericanum from Uruguay. In addition, we observed significant (P < 0.001) regional differences in the composition of FGSC species and trichothecene types within Uruguay. Isolates of F. graminearum with the 15ADON type were the most prevalent in western provinces (95%), while F. asiaticum (43%) and the NIV type (61%) predominated in the new wheat production zone in Cerro Largo along Uruguay's eastern border with Brazil. F. graminearum isolates (15ADON type) were significantly (P < 0.005) more aggressive on wheat than were isolates from the other species examined (NW or 3ADON types). However, F. graminearum isolates (15ADON type) were significantly (P < 0.05) more sensitive to tebuconazole than isolates from other species (NIV type). These results document substantial heterogeneity among the pathogens responsible for FHB in Uruguay. In addition, the regional predominance of the NIV trichothecene type is of significant concern to food safety and indicates that additional monitoring of nivalenol levels in grain may be required. (C) 2013 Elsevier B.V. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据