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Type: Journal article
Title: Leaf cuticular morphology links Platanaceae and Proteaceae
Author: Carpenter, R.
Hill, R.
Jordan, G.
Citation: International Journal of Plant Sciences, 2005; 166(5):843-855
Publisher: Univ Chicago Press
Issue Date: 2005
ISSN: 1058-5893
Statement of
Raymond J. Carpenter, Robert S. Hill, and Gregory J. Jordan
Abstract: The leaf cuticular morphology of extant species of Platanus was investigated using light and scanning electron microscopy. All species are shown to possess trichome bases of the same type as those commonly found in Proteaceae. Of particular significance are compound forms that consist of an annular surface scar associated with more than one underlying epidermal cell. These are found on the adaxial leaf surfaces of all species of Platanus and are also clearly evident on the abaxial surface of Platanus orientalis. This type of trichome base is therefore interpreted as the first detected nonreproductive morphological synapomorphy linking Proteaceae and Platanaceae. Also, the laterocytic, sometimes paracytic, or anomocytic arrangement of subsidiary cells in Platanus is distinct from the general state in Proteaceae, which is brachyparacytic and presumably derived. In Bellendena, possibly the most basal genus of extant Proteaceae, subsidiary cell arrangements resemble those of Platanus. These results are discussed with respect to leaf fossil records of Proteales, where it is concluded that the combination of brachyparacytic stomata and compound trichome bases is strong evidence for Proteaceae.
Keywords: Platanus; Platanaceae; Proteaceae; Bellendena; leaves; cuticles; trichomes; stomata; fossils; phylogeny.
Description: Int. J. Plant Sci. 166(5):843–855. © 2005 by The University of Chicago.
RMID: 0020050851
DOI: 10.1086/431806
Appears in Collections:Earth and Environmental Sciences publications
Environment Institute Leaders publications
Environment Institute publications

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