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首页> 外文期刊>Nordic Journal of Botany >An ignored anatomical variable: pore shape shows a nonrandom variation pattern in xylem cross sections
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An ignored anatomical variable: pore shape shows a nonrandom variation pattern in xylem cross sections

机译：一个忽视解剖变量:孔隙形状显示了非随机变异模式木质部的十字架部分

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摘要

Anatomical characteristics of vessels have a profound impact on the hydraulic conductivity of the xylem. However, pore shape, the cross-section shape of a vessel, has been ignored in previous hydraulic architecture studies. In this study, we examined whether pore shape tended to be circular, and whether variation in pore shape may be affected by water flow path-length and cambial age. The circularity of pores in Betula platyphylla Roth and Quercus mongolica (only earlywood) were analyzed from the pith to the bark along the water flow path. It was found that although there were very few pores with perfectly circular shape, solitary pores did tend to be regularly circular. The pore shape of sequentially formed vessels in the xylem was influenced by cambial age and flow path-length. Pore shape tended to be more circular as flow path-length increased or cambial age decreased. Circular pore shape appears to be an important morphogenetic mechanism for hydraulic architecture development, and studies of it expand our understanding of the structure-function relationships of the xylem.
机译：血管的解剖特征深刻的对渗透系数的影响木质部。形状的容器,在以前被忽视了液压体系结构研究。检查是否倾向于孔隙形状圆形,孔隙形状的变化受水流腔长和形成层的的年龄。platyphylla罗斯和Quercus樟子松(只有从髓的earlywood)进行了分析树皮沿水流路径。虽然有很少的毛孔圆形,孤独的毛孔会做的定期循环。按顺序形成血管的木质部受到形成层的年龄和流腔长。孔隙形状往往是更多的循环流动腔长增加或减少形成层的年龄。圆孔的形状似乎是重要的液压形态形成机制架构开发和研究扩大我们的理解木质部的结构关系。

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