INIBIOMA   20415
INSTITUTO DE INVESTIGACIONES EN BIODIVERSIDAD Y MEDIOAMBIENTE
Unidad Ejecutora - UE
artículos
Título:
Evolution of morphological traits in Verbenaceae
Autor/es:
OLEARY, N., CALVIÑO C. I., MARTÍNEZ, S., LU-IRVING, P., OLMSTEAD, R. G., & MÚLGURA M. E.
Revista:
AMERICAN JOURNAL OF BOTANY
Editorial:
BOTANICAL SOC AMER INC
Referencias:
Lugar: St. Louis; Año: 2012 vol. 99 p. 1778 - 1792
ISSN:
0002-9122
Resumen:
-Premise of the study: A new infrafamilial circumscription of the Verbenaceae with eight tribes: Casselieae, Citharexyleae, Duranteae, Lantaneae, Neospartoneae, Petreeae, Priveae, and Verbeneae, has been recently proposed, on the basis of molecular phylogenetic studies. Two genera, Dipyrena and Rhaphithamnus , remain unplaced. The aim of this work is to reconstruct theevolutionary history of morphological characters traditionally employed in the classifi cation of the Verbenaceae, with special attention to tribes Verbeneae and Lantaneae.-Methods: Twenty-one characters, related to habit and vegetative morphology, infl orescence and floral morphology, ovary and fruit morphology, as well as chromosome number, were optimized over a molecular phylogeny of Verbenaceae.-Key Results: All tribes are supported by at least one morphological trait except tribes Duranteae and Citharexyleae. Suffrutescent habit, sessile fl owers, and four cluses are synapomorphies for tribe Verbeneae. Gynoecium with short style and entire stigma are synapomorphic traits for tribe Lantaneae. Sessile fl owers and unicarpellate ovaries are morphological synapomorphies for the new tribe Neospartoneae. Suffrutescent habit is a synapomorphic trait for tribe Priveae. Homothetic pleiobotrya and absence of the adaxial staminode are synapomorphic traits for tribe Casselieae. Undivided fl eshy fruits are probably a synapomorphic trait for tribe Petreeae. Putative plesiomorphies for the ancestor of the Verbenaceae are discussed as well as synapomorphic traits within other Verbenaceae clades.-Conclusions: Many of the characters traditionally employed in classifi cation have proven to be very homoplastic, or have been shown not to support relationships within the family. Moreover, traditional assumptions concerning character polarity have in some cases been shown to be incorrect.