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Phylogenetic relationships between Pelvetia and Pelvetiopsis (Fucaceae, Phaeophyta) inferred from sequences of the RuBisCo spacer region

Published online by Cambridge University Press:  01 August 1999

YUN KYUNG LEE ,
HWAN SU YOON ,
TAIZO MOTOMURA ,
YUNG JIN KIM  and
SUNG MIN BOO
YUN KYUNG LEE
Affiliation:
Department of Biology, Chungnam National University, Daejon 305–764, Korea
HWAN SU YOON
Affiliation:
Department of Biology, Chungnam National University, Daejon 305–764, Korea
TAIZO MOTOMURA
Affiliation:
Institute of Algological Research, Faculty of Science, Hokkaido University, Muroran 051-0003, Japan
YUNG JIN KIM
Affiliation:
Department of Biology, Chungnam National University, Daejon 305–764, Korea
SUNG MIN BOO
Affiliation:
Department of Biology, Chungnam National University, Daejon 305–764, Korea
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Abstract

As a basis for inferring phylogenetic relationships between Pelvetia and Pelvetiopsis in the family Fucaceae, the complete sequences of the plastid-encoded RuBisCo spacer region were determined for all four species of Pelvetia, for the type species of Pelvetiopsis, P. limitata, and for three other fucacean species (Ascophyllum nodosum, Fucus gardneri and F. vesiculosus). All trees based on the sequences of the RuBisCo spacer region showed that Pelvetia is not monophyletic and consists of two clades, one including P. babingtonii, P. compressa, and P. siliquosa, the other comprising only the type species, P. canaliculata. P. canaliculata is not closely related to any of the other Fucaceae studied, and it may represent a monotypic genus. RuBisCo spacer sequences support the establishment of a new genus for the three Pacific Pelvetia species: P. babingtonii, P. compressa and P. siliquosa. The congruence of the RuBisCo spacer data with reported nuclear rDNA 18S and ITS sequences, and with biogeographical and morphological data, indicates that the RuBisCo spacer region, including its flanking areas, is useful for inferring phylogenetic relationships within the Fucaceae.

Keywords

Fucaceaemolecular systematicsPelvetiaPelvetiopsisPhaeophytaphylogenyRuBisCo spacer
Type
Research Article
Information
European Journal of Phycology , Volume 34 , Issue 3 , August 1999 , pp. 205 - 211
Copyright
© 1999 British Phycological Society

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