PMID: 9546161Apr 18, 1998Paper

Grazing of Tetrahymena sp. on adhered bacteria in percolated columns monitored by in situ hybridization with fluorescent oligonucleotide probes

Applied and Environmental Microbiology
H EisenmannA J Zehnder

Abstract

Predation of attached Pseudomonas putida mt2 by the small ciliate Tetrahymena sp. was investigated with a percolated column system. Grazing rates were examined under static and dynamic conditions and were compared to grazing rates in batch systems containing suspended prey. The prey densities were 2 x 10(8) bacteria per ml of pore space and 2 x 10(8) bacteria per ml of suspension, respectively. Postingestion in situ hybridization of bacteria with fluorescent oligonucleotide probes was used to quantify ingestion. During 30 min, a grazing rate of 1,382 +/- 1,029 bacteria individual-1 h-1 was obtained with suspended prey; this was twice the grazing rate observed with attached bacteria under static conditions. Continuous percolation at a flow rate of 73 cm h-1 further decreased the grazing rate to about 25% of the grazing rate observed with suspended prey. A considerable proportion of the protozoans fed on neither suspended bacteria nor attached bacteria. The transport of ciliates through the columns was monitored at the same time that predation was monitored. Less than 20% of the protozoans passed through the columns without being retained. Most of these organisms ingested no bacteria, whereas the retained protozoans grazed more e...Continue Reading

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Citations

Feb 28, 2001·Environmental Microbiology·T BouchezM Wagner
Sep 9, 2008·Bulletin of Environmental Contamination and Toxicology·Z W SongS P Wen
Jun 13, 2009·FEMS Microbiology Ecology·Anne BöhmeKirsten Küsel
Jul 1, 2005·Nature·Lutz BecksHartmut Arndt
Apr 29, 2006·Microbial Ecology·Suk-Fong Tso, Gary L Taghon
Sep 12, 2009·FEMS Microbiology Ecology·Krista LongneckerElizabeth B Kujawinski
Nov 5, 2005·Applied and Environmental Microbiology·Juan M Medina-SánchezEmilio O Casamayor
Jun 9, 2009·Journal of Bacteriology·William LainhartGerald B Koudelka
Sep 9, 2004·Microbiology and Molecular Biology Reviews : MMBR·Byron F Brehm-Stecher, Eric A Johnson
Nov 3, 2010·Applied and Environmental Microbiology·Steffen KuppardtMatthias Kästner
Jan 8, 2015·Environmental Science & Technology·Rebecca L RubinsteinLeslie M Shor

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