Journal article
Phylogeny of the conjugating green algae based on chloroplast and mitochondrial nucleotide sequence data
Journal of phycology, v 44(2), pp 467-477
01 Apr 2008
PMID: 27041201
Featured in Collection : UN Sustainable Development Goals @ Drexel
Abstract
The conjugating green algae represent a lineage of charophyte green algae known for their structural diversity and unusual mode of sexual reproduction, conjugation. These algae are ubiquitous in freshwater environments, where they are often important primary producers, but few studies have investigated evolutionary relationships in a molecular systematic context. A 109-taxon data set consisting of three gene fragments (two from the chloroplast and one from the mitochondrial genome) was used to estimate the phylogeny of the genera of the conjugating green algae. Maximum likelihood (ML), maximum parsimony (MP), and Bayesian inference (BI) were used to estimate relationships from the 4,047 alignable nucleotides. This study confirmed the polyphyly of the Zygnemataceae and Mesotaeniaceae with respect to one another. The Peniaceae were determined to be paraphyletic, and two genera traditionally classified among the Zygnematales appear to belong to the lineage that gave rise to the Desmidiales. Six genera, Euastrum, Cosmarium, Cylindrocystis, Mesotaenium, Spondylosium, and Staurodesmus, were polyphyletic in this analysis. These findings have important implications for the evolution of structural characteristics in the group and will require some taxonomic changes. More work will be required to delineate lineages of Zygnematales in particular and to identify structural synapomorphies for some of the newly identified clades.
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Details
- Title
- Phylogeny of the conjugating green algae based on chloroplast and mitochondrial nucleotide sequence data
- Creators
- John D. Hall - University of Maryland, College ParkKenneth G. Karol - New York Botanical GardenRichard M. McCourt - Drexel UniversityCharles F. Delwiche - University of Maryland, College Park
- Publication Details
- Journal of phycology, v 44(2), pp 467-477
- Publisher
- Wiley
- Number of pages
- 11
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Biodiversity, Earth, and Environmental Science (BEES); Academy of Natural Sciences of Drexel University
- Web of Science ID
- WOS:000254991300020
- Scopus ID
- 2-s2.0-42249115040
- Other Identifier
- 991019167826104721
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- Collaboration types
- Domestic collaboration
- Web of Science research areas
- Marine & Freshwater Biology
- Plant Sciences