PMID- 12469315 OWN - NLM STAT- MEDLINE DCOM- 20030423 LR - 20191106 IS - 0022-1260 (Print) IS - 0022-1260 (Linking) VI - 48 IP - 1 DP - 2002 Feb TI - Polyphasic approaches to the identification of predominant polyphosphate-accumulating organisms in a laboratory-scale anaerobic/aerobic activated sludge system. PG - 43-54 AB - By combination of denaturing gradient gel electrophoresis of PCR-amplified 16S rDNA (PCR-DGGE), quinone profiling, and 16S rRNA-targeted fluorescence in situ hybridization (FISH), a polyphosphate-accumulating organism (PAO) responsible for phosphate (P)-removal was identified in activated sludge with high P-removal ability from a laboratory-scale anaerobic/aerobic continuous flow reactor. The DNA fragment from the most dense band on the DGGE gel was closely related to that of 'Candidatus Accumulibacter phosphatis' (beta-Proteobacteria). Quinone profiling also suggested the predominance of beta-Proteobacteria. FISH with a specific oligonucleotide probe designed for the sequence showed that the targeted bacterium was dominant in the activated sludge, and the accumulation and consumption of polyphosphate were observed by dual staining with 4',6-diamidino-2-phenylindole. The bacterium was concluded to be the responsible PAO in the reactor. However, when the P-removal ability per cell slightly decreased, the dominance of the PAO greatly diminished in the activated sludge. Such sludge might be dominated by other types of PAOs. FAU - Onda, Shin AU - Onda S AD - Department of Biological Sciences, Tokyo Metropolitan University, Hachioji, Tokyo 192-0397, Japan. FAU - Hiraishi, Akira AU - Hiraishi A FAU - Matsuo, Yoshitaka AU - Matsuo Y FAU - Takii, Susumu AU - Takii S LA - eng PT - Journal Article PL - Japan TA - J Gen Appl Microbiol JT - The Journal of general and applied microbiology JID - 0165543 RN - 0 (DNA, Bacterial) RN - 0 (Fluorescent Dyes) RN - 0 (Indoles) RN - 0 (Polyphosphates) RN - 0 (Quinones) RN - 0 (RNA, Ribosomal, 16S) RN - 0 (Sewage) RN - 47165-04-8 (DAPI) SB - IM MH - Base Sequence MH - Betaproteobacteria/genetics/isolation & purification/*metabolism MH - Bioreactors MH - DNA, Bacterial/chemistry/genetics MH - Electrophoresis MH - Fluorescent Dyes/chemistry MH - In Situ Hybridization, Fluorescence MH - Indoles/chemistry MH - Molecular Sequence Data MH - Phylogeny MH - Polymerase Chain Reaction MH - Polyphosphates/*metabolism MH - Quinones/analysis MH - RNA, Ribosomal, 16S/chemistry/genetics MH - Sequence Analysis, DNA MH - Sewage/*microbiology MH - Waste Disposal, Fluid/*methods EDAT- 2002/12/07 04:00 MHDA- 2003/04/24 05:00 CRDT- 2002/12/07 04:00 PHST- 2002/12/07 04:00 [pubmed] PHST- 2003/04/24 05:00 [medline] PHST- 2002/12/07 04:00 [entrez] AID - 10.2323/jgam.48.43 [doi] PST - ppublish SO - J Gen Appl Microbiol. 2002 Feb;48(1):43-54. doi: 10.2323/jgam.48.43.