玻璃珠系统用于研究Aspergillus spp.的真菌毒素生产. 在玉米和大米粉方面
Katalin Inotai1, Ildikó Bata-Vidács2,3, Ákos Tóth4
1Agro-Environmental Research Centre, Institute of Environmental Sciences, Hungarian University of Agriculture and Life Sciences, Páter Károly u. 1, 2100, Gödöllő, Hungary.
Applied microbiology and biotechnology
|May 29, 2024
概括
与玉米粉相比,菌株在米粉中产生了显著更高水平的阿弗拉托克辛B1和胆固醇囊素. 这种差异与大米粉颗粒的表面积更大有关,影响了菌毒素的产生.
科学领域:
- 食品科学 食品科学 食品科学
- 菌类学 菌类学是指菌类学.
- 分析化学 分析化学
背景情况:
- 菌毒素,如阿弗拉托xin B1 (AFB1) 和斯特里格matocystin (ST),是由真菌产生的有毒的二次代谢产物.
- 阿斯伯吉卢菌种是农产品的常见污染物,包括玉米和大米.
- 了解影响菌毒素产生因素对于食品安全和风险评估至关重要.
研究的目的:
- 调查碳源,特别是米粉与玉米粉对阿斯伯吉路斯菌株产生的AFB1和ST的影响.
- 描述大米和玉米粉颗粒的物理特性,并将它们与真菌毒素生物合成相关联.
- 开发一种用于研究真菌生长和真菌毒素在粉末基质上的产生新的方法.
主要方法:
- 使用的Aspergillus flavus Zt41 (AFB1生产者) 和Aspergillus creber 2663 (ST生产者) 菌株.
- 培养在高纯度大米和玉米粉上的模具作为唯一的碳来源,采用专门的玻璃珠系统来确保通风.
- 使用分析化学技术量化菌毒素的产生,并通过扫描电子显微镜分析粉颗粒形态.
主要成果:
- 由于颗粒尺寸较小,与玉米粉相比,大米粉表现出明显更大的表面积与体积比率.
- 在粉中,菌毒素的产量明显高于米粉,A. flavus的AFB1水平是A. flavus的3-5倍,ST水平也是A. creber的升高.
- 开发的玻璃珠系统有效地促进了真菌生长和粉粉上的真菌毒素分析.
结论:
- 粉颗粒大小和表面积是影响阿斯伯吉勒斯菌种产生的真菌毒素水平的关键因素.
- 粉支持比玉米粉更高的真菌毒素积累,可能是由于其增加的表面积促进真菌代谢.
- 这些发现强调了基质特征在存储谷物和衍生产品的真菌毒素风险评估中的重要性.
关键词:
亚斯伯吉勒斯虫 (Aspergillus creber) 是一种植物.亚斯伯吉勒斯 (Aspergillus flavususus) 是一种有的植物.非洲毒素B1是什么?玉米粉 是一种玉米粉.米粉是一种粉.绝缘性肌肉囊的情况更多相关视频
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