有氧呼吸对乳酸乳球菌代谢途径的影响及其潜在应用展望

Impact of aerobic respiration on metabolic pathway of Lactococcus lactis and the prospect of potential application

摘要: 作为兼性厌氧菌,乳酸乳球菌具有双重的代谢模式,既可以在厌氧条件下进行传统的发酵代谢,也可以在添加血红素且通氧的条件下进行有氧呼吸代谢。本文综述了乳酸乳球菌有氧呼吸代谢的遗传基础的必备元件、显著的生理学变化、实际和潜在应用。乳酸乳球菌在进行有氧呼吸代谢时具有生物量显著增加、延长存活率、降低氧胁迫和酸胁迫等优势,具有巨大的应用潜力。随着乳酸乳球菌有氧呼吸代谢的深入研究,我们可以更好地挖掘乳酸乳球菌的代谢模式和开发乳酸乳球菌的全部潜力。

Abstract: As a facultative anaerobe,Lactococcus lactis has a double metabolic life,it could grow via a traditional fermentation metabolism under anaerobic conditions,its respiration could be activated when provided with heme and aerobic environment. Here,the genetics requirements,the dramatic physiology changes,the actual and potential application of respiration metabolism in L. lactis were discussed. In L. lactis,bacterial biomass,long- term survival,and resistance to oxygen and acid were impacts positively and significantly by respiration,which had great potential. With further research of aerobic respiration metabolism in L. lactis,new perspectives on understanding L.lactis lifestyle and exploiting its full potential can be opened.