乳酸菌对酸乳中霉菌的抑制作用研究

Inhibition effect of Lactic acid bacteria to mold isolated from yogurt

以酸乳中的腐败霉菌为指示菌，采用双层平板拮抗法对28株乳酸菌进行了抗霉菌筛选，得到了9株抗性菌株，分别属于戊糖乳杆菌 （ Lactobacillus pentosus ） 、乳酸乳球菌乳酸亚种（Lactococcus lactissubsp）以及植物乳杆菌（Lactobacillus plantarum）。对戊糖乳杆菌（Lactobacil-1us petttosus）ZJ28在不同培养条件下的抑菌能力进行了研究。结果表明，L.pentosus ZJ28在37℃下，恒温培养26～50h，pH值为4．5或5．5时抗霉菌活性最好。

Double plate antagonism culture method was used to screen antifungal lactic acid bacteria with the mold isolated from yogurt as in-dicator bacterium. These antifungal strains belong to Lactobacillus pentosus, Lactococcus lactis subsp and Lactobadllus plantarum. The antifungal prop-erty of Lactobacillus pentose ZJ28 was studied. The results suggested that the strain showed significant anfifungal activity when cultured at 37 ℃ for 26-50 h with the start pH 4.5 or 5.5.