Title :
Identification and Algae-Lytic Characteristics of a Pigment-Generating Bacterium Isolated from Lake TaiHu
Author :
Yang, Fei ; Li, Xiaoqing ; Liang, Geyu ; Zhou, Xiang ; Yuan, Jun ; Yin, Lihong ; Pu, Yuepu
Author_Institution :
Key Lab. of Environ. Med. & Eng., Minist. of Educ., Southeast Univ., Nanjing, China
Abstract :
An algicidal bacterium was isolated from Lake Taihu during the bloom of Microcystis in 2009. It was Gram-negative, oxidase-negative, and produced red-colored colonies on agar media. The strain was tentatively identified as Serratia marcescens by means of physiological, biochemical reactions and homology analysis based on 16S rDNA. The bacteria could degrade Microcystis aeruginosa effectively. When the algae density was 5.9×106 cells/mL and bacterial cell densities were 9.1×108, 9.1×107 and 9.1×106 cells/mL, the algae-lytic activity was 95%, 81% and 75% in 48h treatment, respectively. The extracellular substance of a kind of pigment produced by the bacteria might be related to algae-lytic effect. The bacterial cell or intracellular substances could also play a certain role in the algae-lysing process.
Keywords :
DNA; biochemistry; biological techniques; cellular biophysics; lakes; microorganisms; molecular biophysics; water pollution; 16S rDNA; Lake Taihu; Microcystis; Serratia marcescens; algae-lytic activity; algicidal bacterium; bacterial cell; biochemical reactions; gram-negative colonies; homology analysis; intracellular substances; oxidase-negative colonies; physiological reactions; pigment-generating bacterium; red-colored colonies; time 48 h; Algae; Biological control systems; Capacitive sensors; Fluorescent lamps; Lakes; Lighting; Microorganisms; Niobium; Pigmentation; Testing;
Conference_Titel :
Bioinformatics and Biomedical Engineering (iCBBE), 2010 4th International Conference on
Conference_Location :
Chengdu
Print_ISBN :
978-1-4244-4712-1
Electronic_ISBN :
2151-7614
DOI :
10.1109/ICBBE.2010.5517711
