对腐烂的植物性肉类类似物中占主导地位的乳酸细菌的基因组洞察
1Department of Food Science and Technology, University of California Davis, Davis, CA, 95616, United States.
Current research in food science
|February 23, 2026
概括
这项研究确定了植物性肉类类似物 (PBMA) 中的主导乳酸细菌 (LAB),揭示了它们的代谢能力和可能导致腐烂的潜力. 了解这些微生物是改善PBMA安全性和保质期的关键.
科学领域:
- 食品微生物学 食品微生物学
- 基因组学就是基因组学.
- 食品科学 食品科学 食品科学
背景情况:
- 植物性肉类类似物 (PBMA) 市场正在迅速扩大,但微生物安全性和腐败机制尚不清楚.
- 乳酸细菌 (LAB) 在发酵食品中很常见,可以导致PBMAs的腐烂.
研究的目的:
- 描述主导的LAB物种,它们的家族遗传关系,以及豆制肉 (SBM) 和豆制肉 (PBM) 产品中的功能基因组特征.
- 了解LAB适应和PBMA在不同储存条件下的持久性的基因组基础.
- 确定控制 LAB 腐烂的潜在目标,并提高 PBMA 的保质期和安全性.
主要方法:
- 从储存在4°C或22°C的腐烂的SBM和PBM中分离和对60个LAB进行全基因组测序.
- 遗传学分析以确定LAB物种及其进化关系.
- 基因组的功能性注释,以评估代谢途径,碳水化合物利用和二次代谢物生产.
主要成果:
- 在SBM中,Latilactobacillus curvatus和Latilactobacillus sakei占主导地位,而Weissella viridescens和W. cibaria 在PBM中占主导地位.
- 拉提拉菌种拥有用于植物碳水化合物分解的甘酸酸酶,而韦塞拉种则具有用于menaquinone和tetrahydrofolate合成的独特途径.
- 温度对主导LAB标识的影响最小;异种发酵代谢和抑制代谢物产生 (细菌素) 是常见的.
结论:
- 在PBMA中占主导地位的LAB表现出异种发酵代谢,有助于腐烂.
- 对营养利用和抑制性化合物生产的基因组能力解释了LAB的持久性.
- 这项研究提供了对PBMA腐烂类型的物种层面见解,为微生物控制提供了目标,以提高产品安全性和延长保质期.
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