title: Algicidal activity of a dibenzofuran-degrader Rhodococcus sp.
abstract: Rhodococcus sp. strain p52, a previously isolated dibenzofuran degrader, could effectively inhibit the growth of cyanobacteria, including species of Microcystis, Anabaena, and Nodularia. When strain p52 was inoculated at the concentration of 7.7×10(7) CFU/ml, 93.5% of exponentially growing Microcystis aeruginosa (7.3×10(6) cells/ml initially) was inhibited after 4 day. The threshold concentration for its algicidal activity against M. aeruginosa was 7.7×10(6) CFU/ml. Strain p52 exerted algicidal effect by synthesizing extracellular substances, which were identified as trans-3-indoleacrylic acid, DL-pipecolic acid, and L-pyroglutamic acid. The effective concentrations of trans-3-indoleacrylic acid and DL-pipecolic acid against M. aeruginosa were tested to be 0.5 mg/l and 5 mg/l, respectively.
authors: Shandong Provincial Key Laboratory of Water Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Shandong University, Jinan, China.
authors: Meng-Hui
authors: MH
authors: Wang
authors: Peng
authors: P
authors: Peng
authors: Yu-Mei
authors: YM
authors: Liu
authors: Rui-Bao
authors: RB
authors: Jia
authors: Li
authors: L
authors: Li
mesh_terms: D017033:Anabaena / Q000254:growth & development*; D000900:Anti-Bacterial Agents / Q000302:isolation & purification / Q000378:metabolism / Q000494:pharmacology*; D000898:Antibiosis; D001572:Benzofurans / Q000378:metabolism; D004269:DNA, Bacterial / Q000737:chemistry / Q000235:genetics; D007211:Indoles / Q000302:isolation & purification / Q000378:metabolism / Q000494:pharmacology; D046931:Microcystis / Q000254:growth & development*; D008969:Molecular Sequence Data; D046932:Nodularia / Q000254:growth & development*; D010875:Pipecolic Acids / Q000302:isolation & purification / Q000378:metabolism / Q000494:pharmacology; D011761:Pyrrolidonecarboxylic Acid / Q000302:isolation & purification / Q000378:metabolism / Q000494:pharmacology; D012240:Rhodococcus / Q000378:metabolism* / Q000502:physiology*; D017422:Sequence Analysis, DNA
chemical_list: D000900:Anti-Bacterial Agents; D001572:Benzofurans; D004269:DNA, Bacterial; D007211:Indoles; D010875:Pipecolic Acids; C001446:indoleacrylic acid; C023614:dibenzofuran; C031345:pipecolic acid; D011761:Pyrrolidonecarboxylic Acid