期刊
INTERNATIONAL JOURNAL OF FOOD MICROBIOLOGY
卷 173, 期 -, 页码 89-98出版社
ELSEVIER
DOI: 10.1016/j.ijfoodmicro.2013.12.012
关键词
Climate conditions; Probabilistic models; Microsatellites; Ochratoxin A; Black aspergilli
The aim of this study was to evaluate the diversity of black aspergilli isolated from berries from different agroclimatic regions of Spain. Growth characterization (in terms of temperature and water activity requirements) of Aspergillus carbonarius, Aspergillus tubingensis and Aspergillus niger was carried out on synthetic grape medium. A. tubingensis and A. niger showed higher maximum temperatures for growth (>45 degrees C versus 40-42 degrees C), and lower minimum a(w) requirements (0.83 a(w) versus 0.87 a(w)) than A. carbonarius. No differences in growth boundaries due to their geographical origin were found within A. niger aggregate isolates. Conversely, A. carbonarius isolates from the hotter and drier region grew and produced OTA at lower a(w) than other isolates. However, little genetic diversity in A. carbonarius was observed for the microsatellites tested and the same sequence of beta-tubulin gene was observed; therefore intraspecific variability did not correlate with the geographical origin of the isolates or with their ability to produce OTA. Climatic change prediction points to drier and hotter climatic scenarios where A. tubingensis and A. niger could be even more prevalent over A. carbonarius, since they are better adapted to extreme high temperature and drier conditions. (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