一株溶藻菌株的分离鉴定及溶藻特性

从某湖泊中分离出一株具有溶藻作用的菌株W4,并且研究了该菌株溶解铜绿微囊藻的作用效果、作用方式以及铜绿微囊藻与溶藻菌株所处生长期对溶藻效果的影响,并对溶藻菌株进行了生理生化鉴定.结果表明,该菌株对铜绿微囊藻具有很好的去除效果,加入特定量的菌株培养液,8d后铜绿微囊藻的去除率可达99.5%.该菌株通过间接作用方式溶解铜绿微囊藻,并且该菌株分泌的抑藻活性物质为非蛋白质类物质.菌株W4对铜绿微囊藻的溶解作用受藻细胞所处生长期的影响,但不受该菌株所处生长期的影响.根据形态特征及生理生化试验初步鉴定W4菌株为链霉菌属.

Isolation,identification and algicidal characteristics of an algicidal bacterium

An algae-lysing bacterium W4 was isolated from a lake in Wuhan. The algicidal effect and the mechanism of bacterial lysing of Microcystis aeruginosa were discussed in this paper. In addition, the influences of the bacterial and algal growth phase on the algicidal effect were investigated. Bacterium W4 was identified as Streptomyces sp. according to its morphological and physiological-biochemical characteristics. The results showed that bacterium W4 had an excellent algicidal effect and 99.5% of Microcystis aeruginosa had been removed by 8 days after addition of the bacterial culture. The bacterium lysed Microcystis aeruginosa indirectly and the active algicidal substances were non-proteinaceous. The algicidal effect was influenced by the algal growth phase rather than the bacterial growth phase.