Bernadette Nanayakkara

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Young P. omorika trees subjected to static bending showed a severe compression wood response as characterized by fluorescence spectroscopy/microscopy, which decreased in severity with height correlated with a decrease in bending moment. This investigation is aimed at understanding the reaction wood response in a slow-growing conifer species under conditions(More)
Cell wall fluorescence and immunocytochemistry demonstrate that xylem parenchyma cell walls do not show changes in structure and composition related to gravitropic response comparable to those of tracheids, even when they have lignified secondary cell walls. Tracheid cell walls in compression wood have altered composition and structure which generates the(More)
A technique whereby whole mounts of delicate tissues of differentiating xylem are imaged directly by polishing and block-face imaging of embedded microcores. Autofluorescence and image analysis aids identifying the stages of xylogenesis. Stem microcores from fast-growing trees, such as Pinus radiata (D. Don) with wide zones of cambium and differentiating(More)
A cross-correlation time-of-flight method for measuring the sound speed in a seedling in a non-destructive and non-damaging way is described. The method uses two miniature accelerometers coupled to the bark of a growing seedling stem to record the acoustic signals and a small striker to generate an acoustic pulse. The two acoustic signals are then(More)
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