CECOAL   02625
CENTRO DE ECOLOGIA APLICADA DEL LITORAL
Unidad Ejecutora - UE
artículos
Título:
Pollen morphology of the Cactaceae of Argentina (Opuntioideae):Austrocylindropuntia Backeb., Maihueniopsis Speg., Opuntia Mill. and Tephrocactus Lem.
Autor/es:
SILVINA GARRALLA Y GRACIELA ANA CUADRADO
Revista:
REVIEW OF PALAEOBOTANY AND PALYNOLOGY
Editorial:
Elsevier
Referencias:
Año: 2006
ISSN:
0034-6667
Resumen:
Abstract The pollen morphology of the Cactaceae (Opuntioideae) of Argentina was studied under optical and scanning electron microscopy. The following species were considered: Austrocylindropuntia  shaferi (Britton & Rose) Backeberg, A .verschaffeltii (Cels ex F. A. C Weber) Backeberg., A .vestita (Salm-Dyck) Backeberg, Maihueniopsis boliviana (Salm-Dyck) R. Kiesling, M. darwinii (Henslow) F. Ritter, M. glomerata (Haworth) R. Kiesling, M. ovata (Pfeiffer) F.Ritter, M. pentlandii (Salm-Dyck) R. Kiesling, Opuntia anacantha Spegazzini, O. arechavaletae Spegazzini, O. aurantiaca Lindley, O. chakensis Spegazzini, O. colubrina A. Castellanos, O. ficus-indica (L.) Miller, O. monacantha Haworth, O. salagria Castellanos, O. quimilo K. Schumann, O. schickendantzii F. A. C. Weber, O. schulzii A. Castellanos & Lelong, O. soehrensii Britton & Rose, O. sulphurea Gillies ex Salm-Dyck, Tunilla corrugata (Salm-Dyck) D. R. Hunt & Iliff, Tephrocactus alexanderi (Britton & Rose) Backeberg, T. aoracanthus (Lemaire) Lemaire, T. articulatus (Pfeiffer) Backeberg, T. geometricus (A. Castellanos) Backeberg, T. halophilus (Spegazzini) Backeberg, T. weberi (Spegazzini) Backeberg. The species of the studied genera are: spheroidal, apolar, radiosymetric. Amb circular. Pantoaperturate. Tectate perforate, tectate imperforate, spinulose, nanospinulose or reticulate.  Morphological characteristics of the pollen grain that allows differentiation of the taxa include the type of exine (tectate/semitectate), shape and number of pores and supratectal elements. Differences among the species are discussed and a species key is presented.