Ribosomal RNA sequence comparisons demonstrate an evolutionary relationship betweenZygnematales and charophytes |
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| Authors: | B Surek U Beemelmanns M Melkonian D Bhattacharya |
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| Institution: | (1) Botanisches Institut, Lehrstuhl I, Universität zu Köln, Gyrhofstrasse 15, D-50931 Köln, Germany |
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| Abstract: | The nuclear-encoded small subunit ribosomal RNA (rRNA) sequences were determined forGenicularia spirotaenia, Mesotaenium caldariorum, andStaurastrum spec. (Zygnematales) to elucidate the evolutionary position of these green algae. Results of neighbour-joining and maximum parsimony phylogenetic analyses support a monophyletic origin of theZygnematales within the evolutionary assemblage defined by theCharophyceae (sensuMattox & Stewart) and land plants. TheZygnematales/Charophyceae/land plants are evolutionarily distinct from the monophyletic lineage defined by theChlorodendrales, Pseudoscourfieldiales, and theMicrothamniales/Chlorophyceae.
In memoriamRobert W. Hoshaw. |
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| Keywords: | Zygnematales Charophyceae Genicularia spirotaenia Mesotaenium caldariorum Staurastrum spec Phylogeny ribosomal RNA systematics |
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