Dasyphyllum diacanthoides (Less.) Cabrera

Nota de alcance

PARTE UTILIZADA= Used part: Partes aéreas. 

ACCION FARMACOLOGICA= Pharmacological action: Cura llagas y heridas, febrífugo. 

ZONA GEOGRÁFICA= Geografical zone: S. de Chile y Argentina. 

Nota de alcance

DIVERSIDAD GENÉTICA Y MEJORAMIENTO DE PLANTAS MEDICINALES= Medicinal plants and improvement of medicinal herbs

Subfamily Barnadesioideae (Asteraceae) consists of nine genera and 91 species endemic to South America. They include annual and perennial herbs, arching shrubs and trees up to 30 m tall. Presumed sister to all other Asteraceae, its intergeneric relationships are key to understanding the early evolution of the family. Results of the only mol. study on the subfamily conflict with relationships inferred from morphol. We investigate inter- and intrageneric relationships in Barnadesioideae with novel DNA sequence data and morphol. characters using parsimony, likelihood and Bayesian inference. All results verify Barnadesioideae as monophyletic and sister to the rest of the family. A basal split within the subfamily is recognized, with Chuquiraga, Doniophyton and Duseniella in one clade, and Arnaldoa, Barnadesia, Dasyphyllum, Fulcaldea, Huarpea and possibly Schlechtendalia in another. The largest genus, Dasyphyllum, is revealed as biphyletic with the two clades sepg. along subgeneric and geog. lines. Schlechtendalia, suggested as the earliest diverging lineage of the subfamily by morphol. studies and parsimony analyses, is found in a more derived position under model-based inference methods. Competing phylogenetic hypotheses, both previous and present, are evaluated using likelihood-based tests. Evolutionary trends within Barnadesioideae are inferred: hummingbird pollination has developed convergently at least three times. An early vicariance in the subfamily's distribution is revealed. X = 9 is supported as the ancestral base chromosome no. for both Barnadesioideae and the family as a whole. 

Nota bibliográfica

1) TOURSARKISSIAN, Martín. Plantas medicinales de Argentina : sus nombres botánicos, vulgares, usos y distribución geográfica. Buenos Aires : Hemisferio Sur, 1980, p.32.

2) GRUENSTAUDL, Michael; et al. Phylogeny of Barnadesioideae (Asteraceae) inferred from DNA sequence data and morphology. Molecular Phylogenetics and Evolution. 2009, vol.51, nº3, p.572-587.

Dasyphyllum diacanthoides (Less.) Cabrera
Término aceptado: 27-May-2008