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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
agricultural and biological sciences
Molecular relationships among the gracilariaceae (Rhodophyta): Further observations on some undetermined species
European Journal of Phycology, Volume 29, No. 3, Year 1994
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Description
We have used molecular characteristics to clarify the taxonomic status of three problematic gracilarioid algae, by comparison with existing data for the Gracilariaceae. Nucleotide sequences of nuclear-encoded 18S rDNA were determined for an unidentified species of Gracilariopsis from North Carolina, and two infertile strains of gracilarioid algae from Namibia, tentatively assigned to Gracilariopsis. The sequence from the North Carolinian alga was intermediate between those established previously for Gracilariopsis lemaneiformis and European Gracilariopsis sp., and represents a different, probably undescribed, species. Sequences from the Namibian plants were characteristic of Gracilaria, and very similar to those from Gracilaria verrucosa and two closely related congeners. In parsimony, distance and maximum-likelihood analyses of these sequences and others already published for the Gracilariaceae, the North Carolinian Gracilariopsis sp. consistently grouped with its congeners, and the two Namibian strains with verrucosa-type species of Gracilaria. Restriction digestion of plastid DNA from the Namibian algae suggested that they were conspecific despite their different morphologies and agar characteristics. Moreover, the restriction patterns were nearly identical with those observed previously for Gracilaria verrucosa, and the Namibian strains are probably referable to this species. © 1994 Taylor & Francis Group, LLC.
Authors & Co-Authors
Bird, C. J.
Canada, Ottawa
National Research Council Canada
Ragan, M. A.
Canada, Ottawa
National Research Council Canada
Critchley, Alan T.
South Africa, Johannesburg
University of the Witwatersrand
Rice, E. L.
Canada, Ottawa
Fisheries and Oceans Canada
Gutell, Robin Ray
United States, Boulder
University of Colorado Boulder
Statistics
Citations: 56
Authors: 5
Affiliations: 4
Identifiers
Doi:
10.1080/09670269400650641
ISSN:
09670262
e-ISSN:
14694433
Research Areas
Cancer
Genetics And Genomics
Study Locations
Namibia