脂肽类生物表面活性剂对细菌表面亲疏水性和粘附性的影响  

The Lipopeptides Effect on the Surface Hydrophobicity and Adhension of the Bacteria

作　　者：黄英[1] 马挺[1] 顾晓波[1] 俞海青[1] 梁凤来[1] 刘如林[1] 

机构地区：[1]南开大学生命科学学院,天津300071

出　　处：《南开大学学报（自然科学版）》2006年第5期74-78,共5页Acta Scientiarum Naturalium Universitatis Nankaiensis

基　　金：国家自然科学基金(59974014)

摘　　要：地衣芽孢杆菌(B acillus lichen if orm is)NK-X3产生的脂肽类表面活性剂具有高表面活性,其临界胶束浓度(CM C)值为30 m g/L.采用接触角测量和烃粘附率实验研究低于CM C值的脂肽浓度对细胞表面亲疏水性和粘附性的影响.结果表明,脂肽具有改变细菌表面的疏水特性,使亲水性的NK-X3菌疏水性增强,疏水性的K 80-B菌疏水性减弱.脂肽改变细菌细胞表面的亲疏水性,从而改变细菌的粘附性.The lipopeptide biosurfactants produced by Bacillus licheniforms NK-X3 have high surface active and antibiotic active. The CMC is 30 mg/L. The effect of the lipopeptides on bacterial hydrophobicity, which concentration is below of the CMC, was measured by using water contact angle measurement and bacterial adhesion to hydrocarbon. The lipopeptides changed the hydrophobicity of the strain NK-X3 and K80-B. The hydrophobic degree of hydrophilic strain NK-X3 was increased, while that of hydrophobic strain K80-B was decreased. The lipopeptides can also change the bacterial adhension.

关 键 词：脂肽类生物表面活性剂 细菌 表面疏水性 粘附性 接触角 

分 类 号：Q935[生物学—微生物学]