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Indentation of juvenile annual growth rings and their impact on morphology of wood cells

机译：少年生长戒指的缩进及其对木细胞形态的影响

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摘要

The morphology of cellular elements of juvenile wood of spruce has, in comparing to mature wood, different parameters. Subsequently, indented growth ring zones, caused by genetic predisposition and cambial injury, can significantly change the morphology of these tissues. The aim of the paper compared the morphology of cellular elements of juvenile wood originating in the indented and the normal growth rings. The results confirmed a significant difference in the proportion, the dimensions and shape of parenchyma cells and tracheids. While, in zones containing the indented growth rings the proportions were 15.6 % and 84.4 %, in normal growth rings were 10.4 % and 89.6 %. Tracheids in the indented growth ring zones were shorter and narrower (1.47 mm and 25.4 μm), but in normal growth ring zones longer and wider (2.14 mm and 28.3 μm). Tracheids from marginal and central zones normal growth rings showed considerable inhomogeneity in longitudinal shape (they were twisted). On the basis of change tissue morphology in the juvenile growth phase we can expect the impact of these growth disproportions on the quality production of pulp and paper, mainly in assortments with small diameter.
机译：云杉少年木材细胞元素的形态，与成熟的木材，不同参数相比。随后，由遗传易感性和椎骨损伤引起的缩进生长环区域可以显着改变这些组织的形态。本文的目的是源自缩进和正常生长环的少年木细胞元素形态。结果证实了实质细胞和治疗的比例，尺寸和形状的显着差异。虽然，在含有缩进生长环的区域中，比例为15.6％，84.4％，正常生长环为10.4％和89.6％。缩进的生长环区域中的躯干较短，更窄（1.47mm和25.4μm），但在正常生长环区域中更长，更宽（2.14mm和28.3μm）。来自边缘和中央区域正常生长环的躯干呈纵向形状（它们被扭曲）表现出相当大的不均匀性。在幼年生长阶段的变化组织形态的基础上，我们可以期望这些增长脱编对纸浆和纸张质量生产的影响，主要是在小直径小的分类中。

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