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Abstract Detail


Systematics Section

Schori, Melanie [1], Furness, Carol Furness [1].

Pollen Diversity in Aquifoliales.

The order Aquifoliales, as currently circumscribed, includes 20 genera in five families, three of which are monogeneric. Pollen was obtained from 19 genera and examined with light and scanning electron microscopy. Shape varies from prolate to oblate, circular or triangular in polar view, with the latter angulaperturate. Pollen grains tend to be quite small, with many genera less than 25 μm along the longest axis. Although pollen generally does not vary substantially within a genus, pollen types within the order are relatively diverse. Ilex, Helwingia, Phyllonoma,and Citronella are tricolporate, Gonocaryum is cryptoporate, and the other genera are (1-)3(-6)-porate. Exine patterns range from psilate (Leptaulus) to echinate (Discophora, Medusanthera), reticulate (Citronella),striato-reticulate (Whitmorea), rugulate (Gomphandra), clavate (Ilex) and perforate (Pseudobotrys). Several interesting exine features are associated with apertures in certain genera. Ilex has colpi with a margo, Pseudobotrys has vestibulate pores, and Cardiopterisis characterized by a ridge around each mesocopial face. This diversity indicates that pollen will provide useful characters in future phylogenetic analyses of the order.

Broader Impacts:


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1 - Jodrell Laboratory, Royal Botanic Gardens, Kew, Richmond, Surrey, TW9 3AG, UK

Keywords:
pollen
Aquifoliales
Aquifoliaceae
Helwingiaceae
Phyllonomaceae
Cardiopteridaceae
Stemonuraceae.

Presentation Type: Oral Paper:Papers for Sections
Session: 27
Location: Lindell A/Chase Park Plaza
Date: Tuesday, July 12th, 2011
Time: 9:45 AM
Number: 27006
Abstract ID:337


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