IAL   21557
INSTITUTO DE AGROBIOTECNOLOGIA DEL LITORAL
Unidad Ejecutora - UE
artículos
Título:
Typology of the inflorescence in Spartina (Poaceae: Eragrostoideae)
Autor/es:
KERN, VERÓNICA; GUARISE, NICOLÁS; VEGETTI, ABELARDO
Revista:
PLANT SYSTEMATICS AND EVOLUTION
Editorial:
Springer Wien
Referencias:
Lugar: Viena (Austria) ; Año: 2008 p. 51 - 61
ISSN:
0378-2697
Resumen:
The typology developed by Troll was followed
to describe inflorescence structures for 15 species of
Spartina. In all species here studied, the truncation of the
terminal spikelet of the main axis and primary paracladium
was observed. The truncation can also involve the short
paracladia subzone so that the inflorescence is confined to
just the long paracladia subzone. A great homogenization
of paracladia and maximum ramification degree limited
generally to the second order of branching are distinctive
characteristics of the genus. Proximal paracladia with third-
order branching were found in only three specimens, and in
these exceptional cases, the homogenization is partial.
Sometimes, in some species, a subzone of long and short
paracladia can be distinguished. The absence of tropho-
tagma paracladia in all the species studied was verified.
The variation in the structure of the inflorescence among
species is due to the differences in the number of short
paracladia, long paracladia, total number of primary pa-
racladia and also in the angle of divergence of the long
paracladia from the main axis. The latter, in addition to
variations in the intercalary growth of the internodes pro-
duces modifications in the general appearance of the
inflorescences. The systematic and taxonomic value of the
inflorescences in Spartina is discussed.