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Giant cuticular pores in Eidothea zoexylocarya (Proteaceae) leaves

Citation

Carpenter, RJ and Jordan, GJ and Leigh, A and Brodribb, TJ, Giant cuticular pores in Eidothea zoexylocarya (Proteaceae) leaves, American Journal of Botany, 94, (8) pp. 1282-1288. ISSN 0002-9122 (2007) [Refereed Article]

Copyright Statement

Copyright 2007 Botanical Society of America Inc

DOI: doi:10.3732/ajb.94.8.1282

Abstract

Ubiquitous, large diameter pores have not previously been adequately demonstrated to occur in leaf cuticles. Here we show conclusively that such structures occur in Eidothea zoexylocarya, a rainforest tree species of Proteaceae restricted to the Australian Wet Tropics. The pores are abundant, large-diameter apertures (~1 μm), that extend perpendicularly most of the way through the cuticle from the inside. They occur on both sides of the leaf, but are absent from the cuticle associated with stomatal complexes on the abaxial side. No such pores were found in any other species, including the only other species of Eidothea, E. hardeniana from New South Wales, and other species that have previously been purported to possess cuticular pores. To determine whether these pores made the cuticles more leaky to water vapor, we measured astomatous cuticular conductances to water vapor for E. zoexylocarya and seven other Proteaceae species of the Wet Tropics. Cuticular conductance for E. zoexylocarya was relatively low, indicating that the prominent pores do not increase conductance. The function of the pores is currently obscure, but the presence of both pores and an adaxial hypodermis in E. zoexylocarya but not E. hardeniana suggests evolution in response to greater environmental stresses in the tropics.

Item Details

Item Type:Refereed Article
Keywords:cuticular conductance, cuticular morphology, cuticular pores, Eidothea, Proteaceae, stomatal complex
Research Division:Biological Sciences
Research Group:Plant Biology
Research Field:Plant Physiology
Objective Division:Expanding Knowledge
Objective Group:Expanding Knowledge
Objective Field:Expanding Knowledge in the Environmental Sciences
Author:Carpenter, RJ (Dr Raymond Carpenter)
Author:Jordan, GJ (Associate Professor Greg Jordan)
Author:Brodribb, TJ (Dr Tim Brodribb)
ID Code:49915
Year Published:2007
Web of Science® Times Cited:6
Deposited By:Plant Science
Deposited On:2007-08-01
Last Modified:2014-11-03
Downloads:0

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