The effect of dissolved organic carbon on bacterial adhesion to conditioning films adsorbed on glass from natural seawater collected during different seasons

被引:61
作者
Bakker, DP
Klijnstra, JW
Busscher, HJ
van der Mei, HC
机构
[1] Univ Groningen, Dept Biomed Engn, NL-9700 AD Groningen, Netherlands
[2] TNO Ind Technol, Antifouling Res Grp, NL-1780 AM Den Helder, Netherlands
关键词
bacteria; adhesion; conditioning film; marine fouling;
D O I
10.1080/08927010310001634898
中图分类号
Q81 [生物工程学(生物技术)]; Q93 [微生物学];
学科分类号
071005 ; 0836 ; 090102 ; 100705 ;
摘要
Adhesion of three marine bacterial strains, i.e. Marinobacter hydrocarbonoclasticus , Psychrobacter sp. and Halomonas pacifica with different cell surface hydrophobicities was measured on glass in a stagnation point flow chamber. Prior to bacterial adhesion, the glass surface was conditioned for 1 h with natural seawater collected at different seasons in order to determine the effect of seawater composition on the conditioning film and bacterial adhesion to it. The presence of a conditioning film was demonstrated by an increase in water contact angle from 15degrees on bare glass to 50degrees on the conditioned glass, concurrent with an increase in the amount of adsorbed organic carbon and nitrogen, as measured by X-ray photoelectron spectroscopy. Multiple linear regression analysis on initial deposition rates, with as explanatory variables the temperature, salinity, pH and concentration of dissolved organic carbon (DOC) of the seawater at the time of collection, showed that the concentration of DOC was most strongly associated with the initial deposition rates of the three strains. Initial deposition rates of the two most hydrophilic strains to a conditioning film, increased with the concentration of DOC in the seawater, whereas the initial deposition rate of the most hydrophobic strain decreased with an increasing concentration of DOC.
引用
收藏
页码:391 / 397
页数:7
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