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Titolo:
BIOMECHANICAL ANALYSIS OF A PALEOZOIC GYMNOSPERM STEM
Autore:
ROWE NP; SPECK T; GALTIER J;
Indirizzi:
UNIV LONDON ROYAL HOLLOWAY & BEDFORD NEW COLL,DEPT GEOL EGHAM TW20 0EX SURREY ENGLAND UNIV FREIBURG,BOT GARTEN W-7800 FREIBURG GERMANY UNIV MONTPELLIER 2,INST SCI EVOLUT,PALEOBOT LAB,CNRS,URA 327 F-34095 MONTPELLIER FRANCE
Titolo Testata:
Proceedings - Royal Society. Biological Sciences
fascicolo: 1333, volume: 252, anno: 1993,
pagine: 19 - 28
SICI:
0962-8452(1993)252:1333<19:BAOAPG>2.0.ZU;2-1
Fonte:
ISI
Lingua:
ENG
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
42
Recensione:
Indirizzi per estratti:
Citazione:
N.P. Rowe et al., "BIOMECHANICAL ANALYSIS OF A PALEOZOIC GYMNOSPERM STEM", Proceedings - Royal Society. Biological Sciences, 252(1333), 1993, pp. 19-28

Abstract

Biomechanical parameters are presented for permineralized Calamopitysstems from the Lower Carboniferous of central Germany. A centrisymmetrical model of the fossilized plant stem as viewed in transverse section suggests that slender stems up to 15 mm in diameter were semi-self-supporting. Analysis of the contribution of various tissue types to the mechanical stability of the stem shows that the outer cortex (alternating bands of fibres and parenchyma) was the principal contributor toflexural stiffness of the stem followed by the multi-fascicular petiole bundles. The cylinder of wood located near to the centre of the stem is of relatively minor structural importance. The slender Calamopitys stem differs in mechanical terms from the plesiomorphic arrangement observed in aneurbphytalean progymnosperms as a result of the support provided by numerous petiolar bundles. This contrasts with the structural divergence observed in Lyginopteris oldhamia, which resulted from an increased diameter of the procambium and larger role of the wood cylinder for mechanical support.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 05/12/20 alle ore 10:10:02