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Possmayer M, Gupta RK, Szyszka-Mroz B, Maxwell DP, Lachance MA, Hüner NPA, Smith DR. Resolving the phylogenetic relationship between Chlamydomonas sp. UWO 241 and Chlamydomonas raudensis sag 49.72 (Chlorophyceae) with nuclear and plastid DNA sequences. J Phycol 2016; 52:305-10. [PMID: 27037594 PMCID: PMC5067557 DOI: 10.1111/jpy.12383] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/28/2015] [Accepted: 11/22/2015] [Indexed: 05/05/2023]
Abstract
The Antarctic psychrophilic green alga Chlamy-domonas sp. UWO 241 is an emerging model for studying microbial adaptation to polar environments. However, little is known about its evolutionary history and its phylogenetic relationship with other chlamydomonadalean algae is equivocal. Here, we attempt to clarify the phylogenetic position of UWO 241, specifically with respect to Chlamydomonas rau-densis SAG 49.72. Contrary to a previous report, we show that UWO 241 is a distinct species from SAG 49.72. Our phylogenetic analyses of nuclear and plastid DNA sequences reveal that UWO 241 represents a unique lineage within the Moewusinia clade (sensu Nakada) of the Chlamydomonadales (Chlorophyceae, Chlorophyta), closely affiliated to the marine species Chlamydomonas parkeae SAG 24.89.
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Affiliation(s)
- Marc Possmayer
- Department of Biology, University of Western Ontario, London, Ontario, Canada, N6A 5B7
| | - Rajesh K Gupta
- Department of Biochemistry, University of Western Ontario, London, Ontario, Canada, N6A 5C1
| | - Beth Szyszka-Mroz
- Department of Biology, University of Western Ontario, London, Ontario, Canada, N6A 5B7
| | - Denis P Maxwell
- Department of Biology, University of Western Ontario, London, Ontario, Canada, N6A 5B7
| | - Marc-André Lachance
- Department of Biology, University of Western Ontario, London, Ontario, Canada, N6A 5B7
| | - Norman P A Hüner
- Department of Biology, University of Western Ontario, London, Ontario, Canada, N6A 5B7
| | - David Roy Smith
- Department of Biology, University of Western Ontario, London, Ontario, Canada, N6A 5B7
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McCourt RM, Karol KG, Bell J, Helm-Bychowski KM, Grajewska A, Wojciechowski MF, Hoshaw RW. PHYLOGENY OF THE CONJUGATING GREEN ALGAE (ZYGNEMOPHYCEAE) BASED ON rbc L SEQUENCES. J Phycol 2000; 36:747-758. [PMID: 29542160 DOI: 10.1046/j.1529-8817.2000.99106.x] [Citation(s) in RCA: 37] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
Sequences of the gene encoding the large subunit of RUBISCO (rbcL) for 30 genera in the six currently recognized families of conjugating green algae (Desmidiaceae, Gonatozygaceae, Mesotaeniaceae, Peniaceae, and Zygnemataceae) were analyzed using maximum parsimony and maximum likelihood; bootstrap replications were performed as a measure of support for clades. Other Charophyceae sensu Mattox and Stewart and representative land plants were used as outgroups. All analyses supported the monophyly of the conjugating green algae. The Desmidiales, or placoderm desmids, constitute a monophyletic group, with moderate to strong support for the four component families of this assemblage (Closteriaceae, Desmidiaceae, Gonatozygaceae, and Peniaceae). The analyses showed that the two families of Zygnematales (Mesotaeniaceae, Zygnemataceae), which have plesiomorphic, unornamented and unsegmented cell walls, are not monophyletic. However, combined taxa of these two traditional families may constitute a monophyletic group. Partitioning the data by codon position revealed no significant differences across all positions or between partitions of positions one and two versus position three. The trees resulting from parsimony analyses using first plus second positions versus third position differed only in topology of branches with poor bootstrap support. The tree derived from third positions only was more resolved than the tree derived from first and second positions. The rbcL-based phylogeny is largely congruent with published analyses of small subunit rDNA sequences for the Zygnematales. The molecular data do not support hypotheses of monophyly for groups of extant unicellular and filamentous or colonial desmid genera exhibiting a common cell shape. A trend is evident from simple omniradiate cell shapes to taxa with lobed cell and plastid shapes, which supports the hypothesis that chloroplast shape evolved generally from simple to complex. The data imply that multicellular placoderm desmids are monophyletic. Several anomalous placements of genera were found, including the saccoderm desmid Roya in the Gonatozygaceae and the zygnematacean Entransia in the Coleochaetales. The former is strongly supported, although the latter is not, and Entransia's phylogenetic position warrants further study.
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Affiliation(s)
- Richard M McCourt
- Department of Botany, Academy of Natural Sciences, 1900 Benjamin Franklin Parkway, Philadelphia, Pennsylvania 19103 Cell Biology and Molecular Genetics/Plant Biology, H. J. Patterson Hall, Building 073, University of Maryland, College Park, Maryland 20742Department of Chemistry, DePaul University, 1036 W. Belden, Chicago, Illinois 60614Department of Biological Sciences, DePaul University, 1036 W. Belden, Chicago, Illinois 60614 Section of Evolution and Ecology, University of California, One Shields Avenue, Davis, California 95616, and Museum of Paleontology and University/Jepson Herbaria, University of California, Berkeley, California 94720Department of Ecology and Evolutionary Biology, University of Arizona, Tucson, Arizona 85721
| | - Kenneth G Karol
- Department of Botany, Academy of Natural Sciences, 1900 Benjamin Franklin Parkway, Philadelphia, Pennsylvania 19103 Cell Biology and Molecular Genetics/Plant Biology, H. J. Patterson Hall, Building 073, University of Maryland, College Park, Maryland 20742Department of Chemistry, DePaul University, 1036 W. Belden, Chicago, Illinois 60614Department of Biological Sciences, DePaul University, 1036 W. Belden, Chicago, Illinois 60614 Section of Evolution and Ecology, University of California, One Shields Avenue, Davis, California 95616, and Museum of Paleontology and University/Jepson Herbaria, University of California, Berkeley, California 94720Department of Ecology and Evolutionary Biology, University of Arizona, Tucson, Arizona 85721
| | - Jeremy Bell
- Department of Botany, Academy of Natural Sciences, 1900 Benjamin Franklin Parkway, Philadelphia, Pennsylvania 19103 Cell Biology and Molecular Genetics/Plant Biology, H. J. Patterson Hall, Building 073, University of Maryland, College Park, Maryland 20742Department of Chemistry, DePaul University, 1036 W. Belden, Chicago, Illinois 60614Department of Biological Sciences, DePaul University, 1036 W. Belden, Chicago, Illinois 60614 Section of Evolution and Ecology, University of California, One Shields Avenue, Davis, California 95616, and Museum of Paleontology and University/Jepson Herbaria, University of California, Berkeley, California 94720Department of Ecology and Evolutionary Biology, University of Arizona, Tucson, Arizona 85721
| | - Kathleen M Helm-Bychowski
- Department of Botany, Academy of Natural Sciences, 1900 Benjamin Franklin Parkway, Philadelphia, Pennsylvania 19103 Cell Biology and Molecular Genetics/Plant Biology, H. J. Patterson Hall, Building 073, University of Maryland, College Park, Maryland 20742Department of Chemistry, DePaul University, 1036 W. Belden, Chicago, Illinois 60614Department of Biological Sciences, DePaul University, 1036 W. Belden, Chicago, Illinois 60614 Section of Evolution and Ecology, University of California, One Shields Avenue, Davis, California 95616, and Museum of Paleontology and University/Jepson Herbaria, University of California, Berkeley, California 94720Department of Ecology and Evolutionary Biology, University of Arizona, Tucson, Arizona 85721
| | - Anna Grajewska
- Department of Botany, Academy of Natural Sciences, 1900 Benjamin Franklin Parkway, Philadelphia, Pennsylvania 19103 Cell Biology and Molecular Genetics/Plant Biology, H. J. Patterson Hall, Building 073, University of Maryland, College Park, Maryland 20742Department of Chemistry, DePaul University, 1036 W. Belden, Chicago, Illinois 60614Department of Biological Sciences, DePaul University, 1036 W. Belden, Chicago, Illinois 60614 Section of Evolution and Ecology, University of California, One Shields Avenue, Davis, California 95616, and Museum of Paleontology and University/Jepson Herbaria, University of California, Berkeley, California 94720Department of Ecology and Evolutionary Biology, University of Arizona, Tucson, Arizona 85721
| | - Martin F Wojciechowski
- Department of Botany, Academy of Natural Sciences, 1900 Benjamin Franklin Parkway, Philadelphia, Pennsylvania 19103 Cell Biology and Molecular Genetics/Plant Biology, H. J. Patterson Hall, Building 073, University of Maryland, College Park, Maryland 20742Department of Chemistry, DePaul University, 1036 W. Belden, Chicago, Illinois 60614Department of Biological Sciences, DePaul University, 1036 W. Belden, Chicago, Illinois 60614 Section of Evolution and Ecology, University of California, One Shields Avenue, Davis, California 95616, and Museum of Paleontology and University/Jepson Herbaria, University of California, Berkeley, California 94720Department of Ecology and Evolutionary Biology, University of Arizona, Tucson, Arizona 85721
| | - Robert W Hoshaw
- Department of Botany, Academy of Natural Sciences, 1900 Benjamin Franklin Parkway, Philadelphia, Pennsylvania 19103 Cell Biology and Molecular Genetics/Plant Biology, H. J. Patterson Hall, Building 073, University of Maryland, College Park, Maryland 20742Department of Chemistry, DePaul University, 1036 W. Belden, Chicago, Illinois 60614Department of Biological Sciences, DePaul University, 1036 W. Belden, Chicago, Illinois 60614 Section of Evolution and Ecology, University of California, One Shields Avenue, Davis, California 95616, and Museum of Paleontology and University/Jepson Herbaria, University of California, Berkeley, California 94720Department of Ecology and Evolutionary Biology, University of Arizona, Tucson, Arizona 85721
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