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The stomatal apparatus of Lycopodium japonicum and its bearing on the stomata of the Devonian lycophyte Drepanophycus spinaeformis

Sun, Tong-Xing, Edwards, Dianne and Li, Cheng-Sen 2005. The stomatal apparatus of Lycopodium japonicum and its bearing on the stomata of the Devonian lycophyte Drepanophycus spinaeformis. Botanical Journal of the Linnean Society 149 (2) , pp. 209-216. 10.1111/j.1095-8339.2005.00434.x

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Abstract

The structure of the stomatal apparatus of the leaf of Lycopodium japonicum Thumb was studied using epidermal macerations, sections and scanning electron microscopy. The stomatal apparatus of L. japonicum consists of two large guard cells and pore, and is anomocytic. Based on light microscopy, the impression from epidermal macerations that there were two small guard cells surrounded by two, large, similarly shaped, subsidiary cells (paracytic) derives from a pronounced elliptical cuticular ledge on the surface of the guard cells surrounding a thickened circumporal area. A similar appearance is characteristic of cuticle preparations of the Devonian lycophyte Drepanophycus spinaeformis Göppert. We therefore conclude, as did W.H. Lang over 70 years ago, that the stomata of the early lycophyte were also anomocytic, as were those of a second species of Drepanophycus, D. qujingensis.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Earth and Ocean Sciences
Subjects: Q Science > QE Geology
Q Science > QK Botany
Uncontrolled Keywords: anomocytic type; cuticle; paracytic type
Publisher: Linnean Society of London
ISSN: 0024-4074
Last Modified: 04 Jun 2017 02:09
URI: http://orca.cf.ac.uk/id/eprint/10142

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