乳酸菌在酸性环境中的生理变化及pHin的调控机制  

Physiological chanages of lactic acid bacteria in low pH environment and itsmeans for defending against low intracellular pH

作　　者：畅天狮[1] 刘俊果[1] 张桂[1] 边红杰[1] 王兴梅 

机构地区：[1]河北科技大学生物工程与食品科学学院,河北石家庄050018 [2]河北沧州职业技术学校,河北沧州061000

出　　处：《中国乳品工业》2002年第2期7-10,共4页China Dairy Industry

摘　　要：维持菌体细胞内pH值的稳定是乳酸菌的重要生理需要之一。确定了在菌种的生长繁殖与保存中,酸性环境会使菌体内不能维持近中性pH值,从而降低其存活的可能性,降低发酵剂的活力。总结了酸性环境对菌体细胞生理的特殊影响,阐述了菌体内pH值为多种新陈代谢活动的控制器,并且探讨了乳酸菌在低pH值环境中的自我保护措施。To lactic acid bacteria,to regulating their cytoplasmic pH is one of the most important physiological requirments.During growth or storage in acid environment,cells may lose viability resulting in the decrease of culture activity.This review describes the physiological changes of lactic acid bacteria in low pH environment and reports the latest progress of research work on the means by which lactic acid bacteria defend against low intracellular pH.

关 键 词：生理变化 调控机制 乳酸菌 酸性环境 

分 类 号：TS252.1[轻工技术与工程—农产品加工及贮藏工程]