Effect of photoperiod and day-night temperatures simulating field conditions on growth and ochratoxin A production of Aspergillus carbonarius strains isolated from grapes
Effect of photoperiod and day-night temperatures simulating field conditions on growth and ochratoxin A production of Aspergillus carbonarius strains isolated from grapes
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DOI：
10.1016/j.fm.2005.12.007
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发表时间：
2006-10-01
影响因子：
5.3
通讯作者：
Marin, S.
中科院分区：
文献类型：
--
作者：
Belli, N.;Ramos, A. J.;Marin, S.
研究了葡萄采收前几个月光照和温度条件对炭曲霉生长和赭曲霉毒素A（OTA）产生的影响。10小时光周期对A.在白天温度（28 ° C）或交替的白天/夜晚温度（28 ° C/20 ° C）下孵育霉菌之间没有差异。然而，在20 ℃下恒定孵育观察到生长较慢。在昼夜交替12小时的温度下，生长在连续黑暗比连续光照条件下更快。光照对菌落形态无明显影响，温度和光照对OTA产量无显著影响。然而，随着光周期促进菌落生长，它也促进OTA积累。A.在先前的实验室研究中报道的carbonarius产生OTA的能力已被证明在野外条件下受到刺激。(c)2006爱思唯尔有限公司保留所有权利。
The effect of light and temperature regimes simulating day and night in the field in the months preceding grape harvest on Aspergillus carbonarius growth and ochratoxin A (OTA) production were investigated. Twelve-hour photoperiod affected positively A. carbonarius growth with no differences between incubating the mould at day temperature (28 degrees C) or alternating day/night temperatures (28 degrees C/20 degrees C). Slower growth, however, was observed with constant incubation at 20 degrees C. Under 12h-alternation periods of day and night temperatures, growth was faster at continuous darkness than under continuous light conditions. Light did not cause any morphological changes in the aspect of the colonies.No significant differences on OTA production were detected due to either fluctuating temperature or photoperiod. However, as photoperiod enhanced the growth of colonies, it also enhanced OTA accumulation. The ability of A. carbonarius to produce OTA reported in previous laboratory studies has been demonstrated to be stimulated in field conditions. (c) 2006 Elsevier Ltd. All rights reserved.