Journal
JOURNAL OF EXPERIMENTAL ZOOLOGY
Volume 294, Issue 2, Pages 122-135Publisher
WILEY-LISS
DOI: 10.1002/jez.10150
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Pollen grains display a wide range of variation in aperture number and arrangement (pattern) in angiosperms. Apertures are well-defined areas of the pollen wall surface that permit pollen tube germination. For low aperture numbers, aperture patterns are characteristic of the major taxonomic divisions of angiosperms. This paper presents a developmental model that explains most of the aperture patterns that are recorded in angiosperms. It is based on the analysis of the different events that occur during meiosis and lead to microspore differentiation. It demonstrates that variation occurring during meiosis in angiosperms is sufficient to produce the core morphological set of the most commonly observed pollen morphologies. (C) 2002 Wiley-Liss, Inc.
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