On the Lamellar Structure of the Tracheid Cell Wall
2002 (English)In: Plant Biology, ISSN 1435-8603, E-ISSN 1438-8677, Vol. 4, no 3, 339-345 p.Article in journal (Refereed) Published
It is clear that cross sections of wood cells show a lamellar structure. This paper investigates the orientation of this lamellar structure of spruce (Picea abies) tracheids using atomic force microscopy (AFM) and scanning electron microscopy (SEM). Cross sections of spruce wood were produced through fracturing in longitudinal bending and tensile testing. When investigated with SEM, the fracture surfaces show a structure of mostly larger radial lamellae, in the order of 30-100 nm, i.e., agglomerations of a few cellulose aggregates. Thin transverse sections of the fracture zones investigated with atomic force microscopy show concentric lamellae with a width in the order of a single cellulose aggregate, i.e., 15-25 nm. No structural connection to the splinters in the radial direction can be seen. It is suggested that the radial lamellar structure is a consequence of the energy released during fracturing of the wood samples and that the undistorted wood has a concentric lamellar structure on a smaller structural level.
Place, publisher, year, edition, pages
2002. Vol. 4, no 3, 339-345 p.
atomic force microscopy, ultrastructure, Picea abies, Norway spruce, lamellar structure, scanning electron microscopy, fracture
IdentifiersURN: urn:nbn:se:kth:diva-4933DOI: 10.1055/s-2002-32341ISI: 000176426800006OAI: oai:DiVA.org:kth-4933DiVA: diva2:7105
QC 201010122005-02-142005-02-142010-10-12Bibliographically approved