Тип публикации: статья из журнала
Год издания: 2012
Идентификатор DOI: 10.1016/j.dendro.2011.06.003
Ключевые слова: Cell wall thickness, Density profile, Profile of element concentration, Radiographic density of cell wall, XRF analysis of tree-ring, Multiparameter tree-ring analysis, calcium, cell organelle, concentration (composition), coniferous tree, linearity, radiography, shrub, strontium, tree ring, X-ray fluorescence, Siberia, Abies, Abies sibirica, Picea, Picea obovata
Аннотация: This study addressed distribution of calcium and strontium in Siberian spruce (Picea obovata Ledeb.) and Siberian fir (Abies sibirica Ledeb.) tree-rings and its dependence on these woody species cell structure. Calcium concentration was found to decrease gradually from earlywood to latewood, whereas strontium showed an opposite trend. However, their trends at the scale of several rings are co-directed in the samples analyzed. A strong linear relationship was identified between the distribution of Sr/Ca concentration ratio and tree-ring density profile for both woody species. Radiographic density of Siberian spruce tree-ring cell walls and Ca and Sr concentrations in them were determined to have negative correlation with cell wall thickness. In earlywood of annual rings of a spruce the radiographic density of cell wall reaches 2.0 g/cm(3) and decreases to 1.2 g/cm(3) in latewood. The hypothesis put forward in this study to explain these strontium and calcium distributions in the tree-rings is that the concentrations of the element ions change with development of different cell wall layers. The high value of radiographic density of a cellular wall in earlywood and its relationship with cell wall thickness can be explained by the presence of ions of calcium in a cellular wall. Ions of calcium absorb X-ray radiation more strongly in comparison with light chemical elements. It can become the reason of observable relationship between radiographic density of cell wall and cell wall thickness. (C) 2011 Istituto Italian di Dendrocronologia. Published by Elsevier GmbH. All rights reserved.
Выпуск журнала: Vol. 30, Is. 2
Номера страниц: 189-194
ISSN журнала: 11257865
Место издания: JENA
Издатель: ELSEVIER GMBH, URBAN & FISCHER VERLAG
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