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Abstract Detail


Systematics/Phytogeography / Taxonomie/ Section

Pierce, Nuri B. [1], Simpson, Michael G. [1].

Polyaperturate pollen types and ratios of heteromorphism in the monocot genus Conostylis R. Br. (Haemodoraceae) are described and evaluated as phylogenetically informative.

Pollen aperture heteromorphism (variation within each flower and in each plant) is explored at length in the diverse monocot genus Conostylis R.Br. and that of related genera Anigozanthos Labill., Phlebocarya R. Br., Tribonanthes Endl., Macropidia (Hook.) Druce, and Blancoa Lindl. (Haemodoraceae), all endemic to Western Australia. We examined and sampled pollen from almost 180 herbarium specimens. We found that aperture number varies greatly in Conostylis (a condition considered rare in Monocots), with biporate, triporate, tetraporate, and pentaporate pollen present. Most species are heteromorphic to a certain degree, with the pollen ratio found to be species specific. Aperturate pollen types and their ratios appear to be stable and consistent along species & species complexes and phylogenetically informative within Conostylis and related taxa, all of which are significant in systematics and development.


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1 - San Diego State University, Biology, San Diego, CA, 92182-4614, USA

Keywords:
pollen aperture
Conostylis
heteromorphism.

Presentation Type: Poster:Posters for Sections
Session: P
Location: Ball Room & Party Room/SUB
Date: Monday, July 28th, 2008
Time: 12:30 PM
Number: PSP025
Abstract ID:372


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