在低温下分离的乳酸细菌的特征及其对料质量的影响
La Zhu1,2,3, Muqier Zhao1,2,3, Yuting Yan1,2,3
1College of Grassland Science, Inner Mongolia Agricultural University, Hohhot, China.
Microbiology spectrum
|March 17, 2025
概括
将耐寒的Pediococcus acidilactici添加到本土草中,显著提高了低温发酵质量. 这提高了料的营养价值,并调节了微生物群落,以改善牲畜健康.
科学领域:
- 动物和乳制品科学动物和乳制品科学
- 微生物学 微生物学
- 农业科学 农业科学
背景情况:
- 本土草对于牲畜的营养有价值,但在中国北部的低温发酵阻碍了料的质量.
- 耐寒的乳酸细菌 (LAB) 在低于最佳温度下对有效的料发酵至关重要.
研究的目的:
- 为了评估Pediococcus acidilactici L10,一个耐寒的LAB菌株,对本土草在低温 (5°C) 的料发酵的影响.
- 分析低温发酵对微生物群落结构和代谢概况的影响.
主要方法:
- 原生草用Pediococcus acidilactici L10在5°C (LT),15°C (MT) 和25°C (CK) 发酵了60天.
- 分析了微生物社区组织和代谢概况.
- 测量了包括pH,乳酸,水溶性碳水化合物和原始蛋白质在内的关键发酵参数.
主要成果:
- 与室温 (25°C) 相比,低温 (5°C) 显著降低了pH值,增加了水溶性碳水化合物和原蛋白含量.
- 在5°C的微生物群落中,Pediococcus acidilactici占主导地位,而在更高的温度下,Lactobacillus plantarum和Levilactobacillus brevis则占主导地位.
- 代谢分析显示,在5°C时,酸,酸和L-proline的上调调节,与修改的糖解和三酸循环有关.
结论:
- 在低温条件下,Pediococcus acidilactici L10的添加有效地提高了本土草的质量.
- 该研究表明,特定的LAB菌株有潜力优化料发酵并改善寒冷气候下的牲畜营养.
- 温度显著影响料发酵,微生物组成和代谢途径,强调选择适当的LAB菌株的重要性.
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