Molecular and morphological relationships between two closely related species, Turbinaria ornata and T. conoides (Sargassaceae, Phaeophyceae) - Université de Bretagne Occidentale Access content directly
Journal Articles Biochemical Systematics and Ecology Year : 2007

Molecular and morphological relationships between two closely related species, Turbinaria ornata and T. conoides (Sargassaceae, Phaeophyceae)

Abstract

We employed four markers (two chloroplastic, one mitochondrial and one nuclear) to investigate whether Turbinaria ornata and Turbinaria conoides, two morphologically similar brown algae, are distinct species. The molecular data revealed reciprocal monophyly, thus confirming the two algae as discrete species. Nevertheless, taxonomical ambiguities remain. T. conoides is more morphologically variable than T. ornata. We identified an atypical T. conoides morphotype whose blade possesses intramarginal teeth, a morphological characteristic of the T. ornata group that is normally absent within T. conoides. The molecular data indicate, nonetheless, that this morphotype belongs genetically to the T. conoides group. Thus, the results cast doubt upon the validity of using intramarginal teeth for species diagnosis.

Dates and versions

hal-00638068 , version 1 (03-11-2011)

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Audrey Rohfritsch, Claude Payri, Valérie Stiger-Pouvreau, François Bonhomme. Molecular and morphological relationships between two closely related species, Turbinaria ornata and T. conoides (Sargassaceae, Phaeophyceae). Biochemical Systematics and Ecology, 2007, 35 (2), pp.91-98. ⟨10.1016/j.bse.2006.09.002⟩. ⟨hal-00638068⟩
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