Bibliographic Detail
Sasaki, H., Flores-Moya, A., Henry, E.C., Müller, D.G. & Kawai, H., 2001
Reference:
Sasaki, H., Flores-Moya, A., Henry, E.C., Müller, D.G. & Kawai, H. (2001). Molecular phylogeny of Phyllariaceae, Halosiphonaceae and Tilopteridales (Phaeophyceae). Phycologia 40: 123-134.
Abstract:
Phylogenetic relationships of problematic members of the Laminariales (Halosiphon and Phyllariaceae) and Tilopteridales
were studied comparing Rubisco gene (rbeL and spacer) and ribosomal DNA (S.8S, ITS2 and a part of 26S) sequence data
covering all species of these taxa and 'primitive' Laminariales. Molecular phylogenetic trees were constructed by use of
maximum parsimony (MP), maximum hkehhood (ML) and neighbour-joining (NJ) methods. The rbcL data supported a
monophyletic Tilopteridales and its close affiliation with the Phyllariaceae and Haiosiphon, contrary to conventional taxonomy
on the basis of life history patterns and morphological features. Haiosiphon, Phyllariaceae and Tilopteridales formed
a sister group to a clade consisting of Desmarestiales and Sporochnales in the ML and NJ analyses, although the bootstrap
values supporting the relationship were not high. This larger clade, including all the taxa mentioned above, formed a sister
lineage to a group including Akkesiphycus, Pseudochordaceae, Chordaceae and the 'advanced' Laminariales (Alariaceae,
Laminariaceae and Lessoniaceae). The rbeL + Rubisco spacer sequences, as well as the S.8S + ITS2 + 26S rDNA
sequences, supported the independence of existing taxa of the Phyllariaceae and suggested early divergence of Saeeorhiza
within the family.
