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Abstract Detail


Systematics Section/ASPT

Gunathilake, Anuradha [1], Prince , J.S. [1], Whitlock, Barbara [2].

Comparative analysis of seed coat micromorphology of Gordonia (Theaceae).

Recent molecular phylogenetic analyses have suggested that Gordonia s.l. (Theaceae) is polyphyletic, with some species now referred to Laplacea and Polyspora. Although fruit and seed characters have been used to circumscribe tribes, genera and species of Theaceae, it is not clear how variation in fruit and seeds corresponds to evolutionary lineages. Here we examine seed micromorphology of several species representing Gordonia s.s., Laplacea, and Polyspora, from the Americas and Asia, using low vacuum mode of scanning electron microscopy(SEM). We observed variation in size and shape of testa cells within species and occasionally within single seed specimens. We examine the relationship of testa cell size with the overall size of the seeds. We discuss the implications of these observations on the assignment of fossil seeds to Gordonia.

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1 - University of Miami, Department of Biology, Rm 215, Cox Science Center, 1301, Memorial Drive, Coral Gables, FL, 33124, USA
2 - University Of Miami, Department Of Biology, P.O. Box 249118, CORAL GABLES, FL, 33124-0421, USA

Keywords:
Theaceae
Gordonia
Laplacea
Polyspora
micromorphology
seed coat.

Presentation Type: Poster:Posters for Sections
Session: P
Location: Battelle South/Convention Center
Date: Monday, July 9th, 2012
Time: 5:30 PM
Number: PSY021
Abstract ID:1114


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