ALGAL GROWTH ENHANCEMENT BY BACTERIA - IS CONSUMPTION OF PHOTOSYNTHETIC OXYGEN INVOLVED

被引：151

作者：

MOUGET, JL

DAKHAMA, A

LAVOIE, MC

DELANOUE, J

机构：

[1] UNIV LAVAL,STA,GREREBA,LAVAL,PQ G1K 7P4,CANADA

[2] UNIV LAVAL,DEPT BIOCHIM,LAVAL,PQ G1K 7P4,CANADA

来源：

FEMS MICROBIOLOGY ECOLOGY | 1995年 / 18卷 / 01期

基金：

加拿大自然科学与工程研究理事会;

关键词：

ALGAL BACTERIAL INTERACTION; ALGAL GROWTH ENHANCEMENT; BACTERIAL O-2-CONSUMPTION; DISSOLVED INORGANIC CARBON PUMP;

D O I：

10.1016/0168-6496(95)00038-C

中图分类号：

Q93 [微生物学];

学科分类号：

071005 ; 100705 ;

摘要：

Pseudomonas diminuta and P. vesicularis, two obligate aerobes isolated from laboratory algal cultures, stimulated the growth of the green microalgae Scenedesmus bicellularis and Chlorella sp., without releasing any growth promoting substance. An intimate contact between both microorganisms was necessary for significant algal growth enhancement. The possibility of algal growth stimulation by bacterial attenuation of photosynthetic oxygen tension was indirectly examined by simulating the effect of bacteria through a physical removal of oxygen (air suction). Vacuum-treated cultures showed an increase in growth rate and photosynthetic activity as compared to the control, a result which cannot be explained by differences in CO2/HCO3- pump activity. In the presence of P. diminuta, the photosynthetic activity of S. bicellularis was more strongly stimulated under a limited concentration of inorganic carbon. It is suggested that, apart from a CO2 supply, aerobic bacteria can promote algal growth by reducing the photosynthetic oxygen tension within the microenvironment of the algal cells, thereby creating more favorable conditions for optimal photosynthetic algal growth.

引用

页码：35 / 43

页数：9

共 29 条

[21] SIGNIFICANCE OF BACTERIAL ANABAENA (CYANOPHYCEAE) ASSOCIATIONS WITH RESPECT TO N2 FIXATION IN FRESHWATER [J].