芽孢杆菌与假单胞菌的疏水性及其应用

Hydrophobicity of Bacillus sp.and Pseudomonas sp.and its application

根据细菌在烃-水两相体系中的细胞数量研究了芽孢杆菌和假单胞菌的表面疏水性及其在不同环境条件下的变化.试验结果显示,正辛醇-水两相体系适用于芽孢杆菌和假单胞菌这类细菌的表面疏水性的研究.细菌表面的疏水性随培养时间,温度和pH值的变化而发生改变.芽孢杆菌和假单胞菌的疏水性与其在水环境中对有机污染物的降解呈一定的相关性.疏水性大的细菌对疏水性有机物的降解速度较疏水性小的细菌快,在其表面的生长速度也更快.探讨了细菌表面的疏水性在养殖生态系统中的生态学意义,为养殖水体有机污染的生物修复提供新的理论基础.

The surface hydrophobicity of Bacillus sp. and Pseudomonas sp. and its changes under different environmental conditions were studied based on the cell amount of bacteria in hydrocarbon-water two-phase system. The experiment results showed that the n-octanol-water two-phase system was suitable for studying the surface hydrophobicity of bacteria such as Bacillus sp. and Pseudomonas sp.; and the hydrophobicity changed with the change of cultivation time temperature and pH value. The hydrophobicities of Bacillus sp. and Pseudomonas sp. were related definitely with the degradation of the organic pollutant in the water environment. The degradation rate of hydrophobic organic by the bacteria of high hydrophobicity was quicker than that by the bacteria of low hydrophobicity; and the growth rate on its surface was more quicker. The ecological significance of the surface hydrophobicity of the bacteria was explored to supply new theoretical basis for the bioremediation of organic pollution in the cultivation waters.