Research Topics
| Kamran Shalchian-TabriziSummaryAffiliation: University of Oslo Country: Norway Publications
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Detail Information
Publications
Diversification of unicellular eukaryotes: cryptomonad colonizations of marine and fresh waters inferred from revised 18S rRNA phylogenyKamran Shalchian-Tabrizi
Microbial Evolution Research Group, Department of Biology, University of Oslo, Norway
Environ Microbiol 10:2635-44. 2008..This implies that the differences in the biogeophysical conditions between marine and fresh waters constitute a substantial barrier for the cross-colonization of these environments by cryptomonads...
Extensive dinoflagellate phylogenies indicate infrequent marine-freshwater transitionsRamiro Logares
Limnology Section, Department of Ecology, Lund University, Ecology Building, SE 223 62 Lund, Sweden
Mol Phylogenet Evol 45:887-903. 2007..Our results also shed light on the phylogenetic positions of several freshwater dinoflagellates which, to date, were uncertain...
Multigene phylogeny of choanozoa and the origin of animalsKamran Shalchian-Tabrizi
Microbial Evolution Research Group, Department of Biology, University of Oslo, Oslo, Norway
PLoS ONE 3:e2098. 2008..Thus, several successive evolutionary innovations occurred among their unicellular closest relatives prior to the origin of the multicellular body-plan of animals...- Telonemia-specific environmental 18S rDNA PCR reveals unknown diversity and multiple marine-freshwater colonizationsJon Bråte
University of Oslo, Department of Biology, Microbial Evolution Research Group MERG, N 0316 Oslo, Norway
BMC Microbiol 10:168. 2010..Here we investigate the diversity and geographic distribution of Telonemia sequences by in-depth sequencing of several new 18S rDNA clone libraries from both marine and freshwater sites by using a Telonemia-specific PCR strategy... - Analysis of environmental 18S ribosomal RNA sequences reveals unknown diversity of the cosmopolitan phylum TelonemiaKamran Shalchian-Tabrizi
Department of Biology, Centre for Ecological and Evolutionary Synthesis, University of Oslo, N 0316 Oslo, Norway
Protist 158:173-80. 2007..Further investigations of the evolutionary relationships within Telonemia should be conducted on isolated cultures of Telonema-like strains using multi-locus sequencing and morphological data... - Genome fragmentation is not confined to the peridinin plastid in dinoflagellatesMari Espelund
Department of Biology, Centre of Ecological and Evolutionary Synthesis CEES, University of Oslo, Oslo, Norway
PLoS ONE 7:e38809. 2012..The fragmentation of the haptophyte-derived plastid genome K. veneficum suggests that it is likely a sign of a host-driven process shaping the plastid genomes of dinoflagellates... - A phylogenetic mosaic plastid proteome and unusual plastid-targeting signals in the green-colored dinoflagellate Lepidodinium chlorophorumMarianne A Minge
Centre for Ecological and Evolutionary Synthesis CEES, Department of Biology, University of Oslo, N 0316 Oslo, Norway
BMC Evol Biol 10:191. 2010.... - Freshwater Perkinsea and marine-freshwater colonizations revealed by pyrosequencing and phylogeny of environmental rDNAJon Bråte
Department of Biology, Microbial Evolution Research Group, University of Oslo, Blindernveien 31, Oslo, Norway
ISME J 4:1144-53. 2010.... - Radiolaria associated with large diversity of marine alveolatesJon Bråte
Microbial Evolution Research Group MERG, Department of Biology, University of Oslo, PO Box 1084 Blindern, N 0316 Oslo
Protist 163:767-77. 2012..This study shows that applying SCWGA on unculturable cells is a promising approach to study the vast diversity and interactions of intracellular eukaryote organisms... - Collodictyon--an ancient lineage in the tree of eukaryotesSen Zhao
Microbial Evolution Research Group, Department of Biology, University of Oslo, Oslo, Norway
Mol Biol Evol 29:1557-68. 2012..These may therefore be ancient morphological features among eukaryotes. Overall, this shows that Collodictyon is a key lineage to understand early eukaryote evolution... - AIR: A batch-oriented web program package for construction of supermatrices ready for phylogenomic analysesSurendra Kumar
Microbial Evolution Research Group, Department of Biology, University of Oslo, Norway
BMC Bioinformatics 10:357. 2009..Therefore, a major goal in phylogenomic analyses is to maximize the ratio of information to noise; this can be achieved by the reduction of fast evolving sites... - Multiple gene genealogies and AFLPs suggest cryptic speciation and long-distance dispersal in the basidiomycete Serpula himantioides (Boletales)Håvard Kauserud
Department of Biology, University of Oslo, PO Box 1066 Blindern, N 0316 Oslo, Norway
Mol Ecol 15:421-31. 2006..Furthermore, this study shows that AFLP data are a valuable supplement to DNA sequence data in that they may detect a finer level of genetic variation... - Evolutionary position of breviate amoebae and the primary eukaryote divergenceMarianne A Minge
Department of Biology, Centre for Ecological and Evolutionary Synthesis, University of Oslo, 0316 Oslo, Norway
Proc Biol Sci 276:597-604. 2009..With these findings, remnants of mitochondria have been detected in all putatively deep-branching amitochondriate organisms... - Genome evolution of a tertiary dinoflagellate plastidTove M Gabrielsen
Centre of Ecological and Evolutionary Synthesis, Department of Biology, University of Oslo, Oslo, Norway
PLoS ONE 6:e19132. 2011.... - Accelerated nrDNA evolution and profound AT bias in the medicinal fungus Cordyceps sinensisØyvind Stensrud
Program for Molecular Ecology and Biosystematics, Department of Biology, University of Oslo, P O Box 1066 Blindern, N 0316 Oslo, Norway
Mycol Res 111:409-15. 2007..We also suggest that the recorded differences in medicinal effects among C. sinensis populations may be attributed to the existence of genetically differentiated chemotypes in this morphotaxon... - Marine-freshwater colonizations of haptophytes inferred from phylogeny of environmental 18S rDNA sequencesKamran Shalchian-Tabrizi
Microbial Evolution Research Group, Department of Biology, University of Oslo, 1066 Blindern, 0316 Oslo, Norway
J Eukaryot Microbiol 58:315-8. 2011..One of these colonizations, which gave rise to HAP-1, took place very early in the history of haptophytes, before the radiation of the Prymnesiophyceae... - CLOTU: an online pipeline for processing and clustering of 454 amplicon reads into OTUs followed by taxonomic annotationSurendra Kumar
Microbial Evolution Research Group, Department of Biology, University of Oslo, Blindern, N 0316 Oslo, Norway
BMC Bioinformatics 12:182. 2011..Here we introduce CLOTU, an online and open access pipeline for processing 454 amplicon reads. CLOTU has been constructed to be highly user-friendly and flexible, since different types of analyses are needed for different datasets... - Galerina Earle: A polyphyletic genus in the consortium of dark-spored agaricsGro Gulden
Natural History Museum, University of Oslo, PO Box 1172 Blindern, N 0318 Oslo, Norway
Mycologia 97:823-37. 2005..Our results affirm that morphological characters often are highly homoplastic in the agarics. At the present stage formal taxonomic consequences or nomenclatural changes are not proposed... - Combined heat shock protein 90 and ribosomal RNA sequence phylogeny supports multiple replacements of dinoflagellate plastidsKamran Shalchian-Tabrizi
Department of Biology, Centre for Ecological and Evolutionary Synthesis, University of Oslo, N-0316 Oslo, Norway
J Eukaryot Microbiol 53:217-24. 2006..Thus, the Hsp90 gene seems to be a promising phylogenetic marker for dinoflagellate phylogeny... - Heterotachy processes in rhodophyte-derived secondhand plastid genes: Implications for addressing the origin and evolution of dinoflagellate plastidsKamran Shalchian-Tabrizi
Centre for Ecological and Evolutionary Synthesis, Department of Biology, University of Oslo, Oslo, Norway
Mol Biol Evol 23:1504-15. 2006..In addition, the refined topologies suggest the red algal order, Porphyridales, as the endosymbiont ancestor of the secondary plastids in cryptophytes, haptophytes, and heterokonts... - Structural analysis of a non-ribosomal halogenated cyclic peptide and its putative operon from Microcystis: implications for evolution of cyanopeptolinsAve Tooming Klunderud
Department of Molecular Biosciences, University of Oslo, 0316 Oslo, Norway
Microbiology 153:1382-93. 2007..Within the genus Microcystis, microcystin and cyanopeptolin synthetases have an evolutionary history of genomic coexistence. However, the data indicated that the two classes of peptide synthetase gene clusters have evolved independently... - Radiolaria divided into Polycystina and Spasmaria in combined 18S and 28S rDNA phylogenyAnders K Krabberød
Microbial Evolution Research Group, Department of Biology, University of Oslo, Oslo, Norway
PLoS ONE 6:e23526. 2011..Further we show with high support that Foraminifera groups within Radiolaria supporting the Retaria hypothesis... - Seven gene phylogeny of heterokontsIngvild Riisberg
Marine Biology, Department of Biology, University of Oslo, P O Box 1066, Blindern, NO 0316 Oslo, Norway
Protist 160:191-204. 2009.... - Telonema antarcticum sp. nov., a common marine phagotrophic flagellateDag Klaveness
Department of Biology, University of Oslo, PO Box 1066 Blindern, N 0316 Oslo, Norway
Int J Syst Evol Microbiol 55:2595-604. 2005..The molecular phylogeny inferred from the SSU rRNA gene sequence suggested that Telonema represents an isolated and deep branch among the tubulocristate protists... - Multilocus sequencing reveals multiple geographically structured lineages of Coniophora arida and C. olivacea (Boletales) in North AmericaHåvard Kauserud
Department of Biology, University of Oslo, P O Box 1066 Blindern, N 0316 Oslo, Norway
Mycologia 99:705-13. 2007..Together with other recent investigations of Coniophora species our data suggest that the genus comprises a significant number of cryptic species and is much more diverse than previously deduced from morphological characteristics... - Massive expansion of the calpain gene family in unicellular eukaryotesSen Zhao
Microbial Evolution Research Group MERG, Department of Biology, University of Oslo, Oslo, N 0136, Norway
BMC Evol Biol 12:193. 2012..e. protists). Here, we study the distribution and evolution of calpain genes in a wide range of eukaryote genomes from major branches in the tree of life... - Identification and comparative analysis of the RpL14 gene from Takifugu rubripesEspen Enerly
Institute of Biology, Division of Cell and Molecular Biology, University of Oslo, Blindern, Oslo, Norway
Hereditas 139:143-50. 2003..A comparison of the RpL14 gene structure from a broad range of organisms indicates that both loss and gain of introns have occurred during the evolution of the gene... - Phenotypically different microalgal morphospecies with identical ribosomal DNA: a case of rapid adaptive evolution?Ramiro Logares
Limnology Division, Ecology Department, Lund University, Lund, Sweden
Microb Ecol 53:549-61. 2007..Finally, our results indicate that identical ITS rDNA sequences do not necessarily imply the same microbial species, as commonly assumed... - Phylogenomics reveals a new 'megagroup' including most photosynthetic eukaryotesFabien Burki
Department of Zoology and Animal Biology, University of Geneva, Geneva 4, Switzerland
Biol Lett 4:366-9. 2008..At its deepest level, the tree of eukaryotes now receives strong support for two monophyletic megagroups comprising most of the eukaryotic diversity... - The brain-pituitary-gonad axis in male teleosts, with special emphasis on flatfish (Pleuronectiformes)Finn Arne Weltzien
Institute of Marine Research, Austevoll Aquaculture Research Station, 5392 Storebø, Norway
Comp Biochem Physiol A Mol Integr Physiol 137:447-77. 2004..In addition to reviewing recent information on flatfish, we present some entirely new information on the phylogeny and molecular structure of teleost gonadotropins...