PMID- 16427805 OWN - NLM STAT- MEDLINE DCOM- 20060522 LR - 20191210 IS - 1434-4610 (Print) IS - 1434-4610 (Linking) VI - 157 IP - 1 DP - 2006 Feb TI - Fluorescence in situ hybridization with specific oligonucleotide rRNA probes distinguishes the sibling species Stylonychia lemnae and Stylonychia mytilus (Ciliophora, Spirotrichea). PG - 21-30 AB - Based on morphological and morphogenetic characters alone, the sibling species Stylonychia lemnae and Stylonychia mytilus, members of the Stylonychia mytilus complex, can hardly be distinguished. However, biochemical investigations of the isoenzyme pattern of different enzymes showed a distinct differentiation between these two species. In the last few years, fluorescence in situ hybridization (FISH) techniques have become a suitable and reliable tool for identification and differentiation of closely related species of protozoa, such as ciliates. To distinguish the sibling species, a set of specific oligonucleotide probes were developed. In the present study, the SSU rDNA of 7 clones of Stylonychia lemnae and 13 clones of Stylonychia mytilus, isolated from different geographic regions, were sequenced. Comparing all SSU rDNA sequences of both species, only one single difference within the whole gene was detected. Based on this difference, a set of two oligonucleotide probes, targeting the SSU rRNA of each species (Stylonychia mytilus and Stylonychia lemnae) was designed. These probes were successfully tested by applying the FISH techniques on preserved cells of different clones of both species. FAU - Schmidt, Stephanie L AU - Schmidt SL AD - Institute of Biology II, Department of Molecular Evolution and Animal Systematics, University of Leipzig, Talstrasse 33, 04103 Leipzig, Germany. sschmidt@rz.uni-leipzig.de FAU - Bernhard, Detlef AU - Bernhard D FAU - Schlegel, Martin AU - Schlegel M FAU - Fried, Johannes AU - Fried J LA - eng SI - GENBANK/AM086648 SI - GENBANK/AM086649 SI - GENBANK/AM086650 SI - GENBANK/AM086651 SI - GENBANK/AM086652 SI - GENBANK/AM086653 SI - GENBANK/AM086654 SI - GENBANK/AM086655 SI - GENBANK/AM086656 SI - GENBANK/AM086657 SI - GENBANK/AM086658 SI - GENBANK/AM086659 SI - GENBANK/AM086660 SI - GENBANK/AM086661 SI - GENBANK/AM086662 SI - GENBANK/AM086663 SI - GENBANK/AM086664 SI - GENBANK/AM086665 SI - GENBANK/AM086666 SI - GENBANK/AM086667 PT - Evaluation Study PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20060120 PL - Germany TA - Protist JT - Protist JID - 9806488 RN - 0 (DNA, Protozoan) RN - 0 (Oligonucleotide Probes) RN - 0 (RNA, Ribosomal) SB - IM MH - Animals MH - Base Sequence MH - Ciliophora/*classification/genetics MH - DNA, Protozoan/analysis MH - In Situ Hybridization, Fluorescence/*methods MH - Molecular Sequence Data MH - *Oligonucleotide Probes MH - RNA, Ribosomal/*genetics MH - Sequence Analysis, DNA MH - Species Specificity EDAT- 2006/01/24 09:00 MHDA- 2006/05/23 09:00 CRDT- 2006/01/24 09:00 PHST- 2005/06/20 00:00 [received] PHST- 2005/09/27 00:00 [accepted] PHST- 2006/01/24 09:00 [pubmed] PHST- 2006/05/23 09:00 [medline] PHST- 2006/01/24 09:00 [entrez] AID - S1434-4610(05)00102-1 [pii] AID - 10.1016/j.protis.2005.09.004 [doi] PST - ppublish SO - Protist. 2006 Feb;157(1):21-30. doi: 10.1016/j.protis.2005.09.004. Epub 2006 Jan 20.