by: Steven Dessein, Helga Ochoterena, Petra De Block, Frederic Lens, Elmar Robbrecht, Peter Schols, Erik Smets, Stefan Vinckier, Suzy Huysmans
Availability: Available for download now
Format: HTML
Label: Thomson Gale
Manufacturer: Thomson Gale
Number Of Pages: 22
Publication Date: July 01, 2005
Publisher: Thomson Gale
Release Date: December 15, 2005
Studio: Thomson Gale
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This digital document is an article from The Botanical Review, published by Thomson Gale on July 1, 2005. The length of the article is 6358 words. The page length shown above is based on a typical 300-word page. The article is delivered in HTML format and is available in your Amazon.com Digital Locker immediately after purchase. You can view it with any web browser.
From the author: In the 1990s Rubiaceae became a hot spot for systematists, mainly due to the comprehensive treatment of the family by Robbrecht in 1988. Next to the exploration of macromolecular characters to infer the phylogeny, the palynology of Rubiaceae finally received the attention it deserves. This article aims to present a state-of-the-art analysis of the systematic palynology of the family. The range of variation in pollen morphology is wide, and some of the pollen features are not known from other angiosperm taxa; e.g., a looplike or spiral pattern for the position of apertures in pantoaperturate grains. We compiled an online database at the generic level for the major pollen characters and orbicule presence in Rubiaceae. An overview of the variation is presented here and illustrated per character: dispersal unit, pollen size and shape, aperture number, position and type, sexine ornamentation, nexine pattern, and stratification of the sporoderm. The presence/absence and morphological variation of orbicules at the generic level is provided as well. The systematic usefulness of pollen morphology in Rubiaceae is discussed at the (sub)family, tribal, generic, and infraspecific levels, using up-to-date evolutionary hypotheses for the different lineages in the family. The problems and opportunities of coding pollen characters for cladistic analyses are also treated.
Citation Details
Title: Palynological characters and their phylogenetic signal in Rubiaceae.
Author: Steven Dessein
Publication: The Botanical Review (Magazine/Journal)
Date: July 1, 2005
Publisher: Thomson Gale
Volume: 71 Issue: 3 Page: 354(26)
Distributed by Thomson Gale
