Edwards, Dianne ORCID: https://orcid.org/0000-0002-9786-4395 and Axe, Lindsey 2000. Novel conducting tissues in Lower Devonian plants. Botanical Journal of the Linnean Society 134 (1-2) , pp. 383-399. 10.1111/j.1095-8339.2000.tb02359.x |
Abstract
Elongate cells presumed to comprise water-conducting tissues are described from the central regions of short lengths of two naked, stomatiferous, coalified, axial fossils from Lochkovian (Lower Devonian) fluvial rocks in the Welsh Borderland. In one, a discrete central strand is predominantly composed of uniformly thickened cells that are compared with central tissues in coeval plants, e.g. Aglaophyton, and the hydroids of extant mosses. The other has at least two types of cells with pits of plasmodesmata dimensions that perforate only the inner layer of a bilayered wall. These are compared with liverwort and Takakia hydroids and the coeval S-type tracheids that characterize the Rhyniopsida. The affinities of the two axes remain equivocal. The relevance of plasmodesmata-derived pits to the evolution of diversity in water-conducting elements in early cmbryophytes is discussed.
Item Type: | Article |
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Date Type: | Publication |
Status: | Published |
Schools: | Earth and Environmental Sciences |
Subjects: | Q Science > QE Geology Q Science > QK Botany |
Uncontrolled Keywords: | bryophytes; hydroids leptoids; plasmodesmata tracheids |
Publisher: | Linnean Society of London |
ISSN: | 0024-4074 |
Last Modified: | 18 Oct 2022 12:35 |
URI: | https://orca.cardiff.ac.uk/id/eprint/10513 |
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