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在Ochratoxin A产生的菌株依赖变异性由Aspergillus spp.生产. 在不同的体外培养条件下

Zuzana Barboráková¹, Dana Tančinová¹, Juraj Medo¹

¹Institute of Biotechnology, Faculty of Biotechnology and Food Sciences, Slovak University of Agriculture in Nitra, Tr. A. Hlinku 2, 94976 Nitra, Slovakia.

|December 31, 2025

概括

奥克拉托克辛A (OTA) 产量在阿斯伯吉卢斯种类和菌株之间有很大差异,受培养介质和温度的影响. 最佳条件和菌株特定的动态对于理解和管理OTA生物合成至关重要.

科学领域:

食品微生物学食品微生物学
菌类学菌类学是指菌类学.
食品安全食品安全

背景情况:

奥克拉托克辛A (OTA) 是几个阿斯伯吉勒斯菌种产生的强效菌毒素.
了解影响OTA生产的因素对于食品安全和风险评估至关重要.

研究的目的:

在不同的条件下,研究不同类型的阿斯伯吉勒斯菌种中Ochratoxin A (OTA) 生产动态.
确定影响OTA生物合成的关键因素,包括真菌菌株,培养基和温度.

主要方法:

在四种不同的介质 (MEA,CYA,PDA,YES) 上种植了九种Aspergillus菌株 (A. westerdijkiae,A. ochraceus,A. sulphureus,A. carbonarius,A. albertensis).
在四种温度 (18°C,22°C,25°C,30°C) 进行了化.
使用高性能液态染色学 (HPLC) 在多个时间点 (第6,10,14,21,30天) 量化OTA产量.

主要成果:

在不同Aspergillus菌株之间观察到OTA产量的显著变化,即使在同一物种内也是如此.
阿斯珀吉勒斯 (Aspergillus ochraceus),A. westerdijkiae和A. sulphureus是最强大的OTA生产者,而A. carbonarius的产量是最小的.
酵母提取物糖 (YES) 介质和18°C和25°C的温度有利于更高的OTA积累.
每个菌株都表现出一个独特的时间过程,以最大限度地生产OTA.

结论:

菌株,培养基和温度是奥毒素A (OTA) 生产的关键决定因素.
OTA生物合成的动态是高度菌株特异性的.
这些发现对于制定有效的策略来控制食品和料中OTA污染至关重要.

关键词:

亚斯珀吉洛斯 (Aspergillus) 是一种植物.在HPLC中使用HPLC.种植条件种植条件种植媒介的种植方式 ochratoxin A 是一种毒素.

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