发酵食用橄的冷保存微生物组:关于生命力,功能稳定性和生物银行应用的综合案例研究
Katia Gialluisi1, Luciana De Vero1, Giuseppe Petruzzino1
1Institute of Sciences of Food Production (ISPA), National Research Council (CNR), Via G. Amendola 122/O, 70126 Bari, Italy.
Food research international (Ottawa, Ont.)
|February 18, 2026
概括
低温保存有效地保护了发酵食品微生物组的生命力和功能,包括食用橄. 这项研究证实,甘油和二甲基硫氧化物 (DMSO) 维持了长期生物银行微生物联盟.
科学领域:
- 食品微生物学 食品微生物学
- 微生物组科学 微生物组科学
- 低温生物学 低温生物学
背景情况:
- 微生物组对于食品发酵至关重要,影响质量,安全和营养.
- 保护培养集中的微生物生物多样性对于可持续的粮食系统至关重要.
- 复杂微生物组的长期保护面临着由于异质性和保护敏感性的挑战.
研究的目的:
- 评估两种用于长期储存食用橄微生物组的冷保存方案.
- 评估冷保存对微生物生存能力,分类组合和代谢功能的影响.
- 为了确定糖醇和二甲基硫氧化物 (DMSO) 作为冷保护剂的有效性.
主要方法:
- 在-140°C使用15%的甘油或DMSO冷保存食用橄微生物组.
- 使用培养依赖方法评估微生物生存能力.
- 通过基于RNA的metabarcoding对分类组合的分析.
- 使用Biolog® EcoPlate分析对代谢功能进行评估.
- 在冷保存后测量oleuropein降解的程度.
主要成果:
- 微生物活力略有下降,不管使用了什么冷保护剂.
- 一年后,没有观察到代谢概况或分类组合的显著变化.
- 低温保存有效地保持了微生物联盟的功能.
- 在回收和新鲜样本中,欧蛋白的降解是可比的.
结论:
- 使用甘油或DMSO的冷保存对于发酵食品微生物组的长期生物银行是有效的.
- 研究的协议确保了微生物联盟的稳定性和功能性.
- 这种方法支持微生物资源的保护,微生物组研究中的可再生性,以及发酵产品的标准化.
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