Artículo
Centothecoid grasses and the evolution of panicoid spikelets
Fecha de publicación:
09/2003
Editorial:
Springer Wien
Revista:
Plant Systematics and Evolution
ISSN:
0378-2697
Idioma:
Inglés
Tipo de recurso:
Artículo publicado
Clasificación temática:
Resumen
An evolutionary pathway leading to acrotonous, 2-flowered spikelets of Panicoideae has been suggested elsewhere, which involves apical reduction of many-flowered mesotonic spikelets. Current phylogenies of the grass family show a sister relationship between Panicoideae and Centothecoideae. A survey of spikelet structures occurring among centothecoid grasses shows that some representatives of this group have intermediate morphologies which are consistent with that hypothesis. Chasmanthium and Bromuniola have many-flowered spikelets with a barren proximal floret, whereas Thysanolaena, Gouldochloa and Gynerium represent a series of apical reductions leading to 2-flowered spikelets. Moreover, many-flowered spikelets with 1-3 proximal male flowers followed by several female-fertile ones occur in Puelioideae, one of the early-diverging clades of the Poaceae. This fact suggests that some "panicoid" characters may have evolved long before the radiation of the Panicoideae took place.
Palabras clave:
CENTOTHECOIDEAE
,
MORPHOLOGY
,
PANICOIDEAE
,
POACEAE
,
SPIKELET EVOLUTION
Archivos asociados
Licencia
Identificadores
Colecciones
Articulos(OCA PQUE. CENTENARIO)
Articulos de OFICINA DE COORDINACION ADMINISTRATIVA PQUE. CENTENARIO
Articulos de OFICINA DE COORDINACION ADMINISTRATIVA PQUE. CENTENARIO
Citación
Rua, Gabriel Hugo; Centothecoid grasses and the evolution of panicoid spikelets; Springer Wien; Plant Systematics and Evolution; 240; 1-4; 9-2003; 83-89
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