Journal article

Intra-ring checking in Pinus radiata D. Don: the occurrence of cell wall fracture, cell collapse, and lignin distribution

Tracy L Putoczki, Hema Nair, Brian Butterfield, Sandra L Jackson

TREES-STRUCTURE AND FUNCTION | SPRINGER HEIDELBERG | Published : 2007

Abstract

Ultrastructural and cytochemical features of tracheid cell walls were examined in oven-dried Pinus radiata D. Don disks that demonstrated a range in severity of the wood quality flaw referred to as "intra-ring checking," from severe to none. Observations of the tracheid cell wall at the ultrastructural level included the localization of the origin of tears between adjacent cells, and the occurrence of tracheid collapse. Cytochemical analysis focused on determination of the spatial distribution of lignin within the cell wall layers. Tracheid lignin content was further quantified using the Klason and acetyl bromide methods. We found considerable homogeneity in the point of failure in the wood ..

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