Cyberlindnera fabianii,一种不常见的酵母,对质面包腐败负责
Andrea Colautti1, Elisabetta Orecchia1, Francesca Coppola2
1Department of Agricultural, Food, Environmental and Animal Science, University of Udine, Via Sondrio 2/a, 33100 Udine, Italy.
Foods (Basel, Switzerland)
|August 10, 2024
概括
一种罕见的酵母,Cyberlindnera fabianii,被确定为质面包腐烂的原因,产生粉状殖民地. 这种酵母在面包中壮成长.
科学领域:
- 食品微生物学 食品微生物学
- 酵母分类学 酵母分类学
- 食物腐烂是因为食物腐烂.
背景情况:
- 工业质面包 (GB) 容易被微生物污染物破坏.
- 众所周知,像Hyphopichia burtonii和Wickerhamomyces anomalus这样的石灰酵母会导致类似的腐烂模式.
- 准确的酵母鉴定对于了解食物腐烂机制至关重要.
研究的目的:
- 为了确定导致工业质面包腐烂的酵母菌株.
- 为了描述被分离出来的酵母所造成的腐烂.
- 研究质面包中的酵母的生长条件和代谢副产品.
主要方法:
- 从腐烂的质面包中分离和培养酵母.
- 传统的酵母鉴定方法,其次是基因组分析.
- 对质面包的物理化学特性 (pH,水活性,水分含量) 的分析.
- 气相色谱-质谱 (GC-MS) 用于识别代谢副产品.
主要成果:
- 从腐烂的质面包中分离出一种单一的酵母菌株,呈现出白色粉状和细丝状的殖民地.
- 最初的鉴定表明Wickerhamomyces异常,但基因组分析证实该物种是Cyberlindnera fabianii.
- 由于有利的物理化学特性 (pH 5.34,Aw 0.97,50.36%水分),Cyberlindnera fabianii在质面包中成功生长.
- 破坏的特点是存在酒精,有机酸和由糖发酵和氨基酸降解而产生的.
结论:
- 一种很少涉及的酵母,Cyberlindnera fabianii,负责一种特定类型的质面包腐烂.
- 酵母能够生长和破坏质面包的能力与其物理化学特性有关.
- 代谢副产品,包括各种酒精和,证实酵母活动,并有助于破坏特征.
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