Abstract

TRIANA-MORENO, Luz Amparo. MORPHOLOGICAL CHARACTERS IN POLYPODIACEAE SPORES AND THEIR APPLICATION IN PHYLOGENETIC RECONSTRUCTION. Bol. Cient. Mus. Hist. Nat. Univ. Caldas [online]. 2012, vol.16, n.2, pp.53-59. ISSN 0123-3068.

During the performance of a preliminary phyogenetic study of Pecluma M.G. Price (Polypodiaceae), eight genera of the family were studied, as well as Oleandra Cav. (Oleandraceae), which was an element of the outgroup. The morphology of the spores was studied, because it is a phylogeneticaly unexplored information source. It was observed using high vacuum scanning electron microscopy. Three spore characters were studied: "chlorophyllous spores", "shape" and "ornamentation". The distribution of the spore characters on the strict consensus cladogram shows that ornamentation tends to be constant within genera, and it allows the recognition of intergeneric differences. Thus, the studied characters could be a useful source to precise the genera or species complexes that present a conflictive taxonomic situation within the family (v.g. Polypodium dulce group).

Keywords : phylogeny; ferns; spore ornamentation; Oleandra; Polypodiaceae.

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