冠突散囊菌发酵液的抑菌作用

Anti-microbial Activity of Fermentation Supernatants of Eurotium cristatum

采用滤纸片法研究茯砖茶浸提液、PDA原液和冠突散囊菌PDA发酵液对细菌、酵母菌、霉菌和放线菌的抑制作用及酸碱度、温度和紫外光照射对冠突散囊菌PDA发酵液抑菌作用的影响。结果表明:茯砖茶浸提液和冠突散囊菌发酵液对细菌有较强的抑制作用,而对酵母菌和霉菌抑制作用不明显。通过对冠突散囊菌PDA发酵液抑菌物质稳定性的初步研究,结果表明,发酵液中的抑菌物质对温度(40～120℃)、紫外光(照射10h之内)和酸碱(pH2～10)稳定。

The anti-microbial activities of hot water extract from Poria brick tea,PDA liquid medium and their fermentation supernatants by Eurotium cristatum against bacteria,fungi,mold and actinomycetes were determined by filter paper disc method.Meanwhile,the effects of factors including pH,temperature,UV on the anti-microbial activities of PDA fermentation supernatant were explored.The results indicated that both fermentation supernatants had an obvious anti-bacterial activity but no obvious inhibition effect against yeast and mold.Preliminary studies on the anti-microbial stability of the PDA fermentation supernatant showed that it had better stability under each of the following conditions： 40-120 ℃,UV irradiation for 10 h and pH 2-10.