Structural Variations and Secondary Changes in Pit Membranes in Fraxinus Mandshurica Var. Japonica
Structural Variations and Secondary Changes in Pit Membranes in Fraxinus Mandshurica Var. Japonica
复制标题
水曲柳纹孔膜的结构变异和次生变化。
DOI：
--
复制
发表时间：
1994
期刊：
影响因子：
--
通讯作者：
K. Fukuzawa
中科院分区：
文献类型：
--
作者：
Y. Sano;K. Fukuzawa
用紫外显微镜、扫描电镜和透射电镜研究了水曲霉最外层边材到内层心材维管间膜、纤维间膜、薄壁间膜、血管-薄壁膜和纤维-薄壁膜的结构变化和次生变化。在边材中，坑膜未出现木质化现象，很少有坑膜包覆。在心材中，强吸收紫外线的物质大量沉积在维管间膜、薄壁间膜、血管-薄壁膜和纤维-薄壁坑膜上。光纤间凹坑对的二次变化不那么明显。在边材和心材中往往没有纤维间孔膜。
Structural variations and secondary changes in intervascular, interfibre, interparenchyma, vessel-parenchyma, and fibre-parenchyma pit membranes, from the outermost sapwood to the inner heartwood of Fraxinus mandshurica var.japonica, were studied by uitraviolet light microscopy, and by scanning and transmission electron microscopy. In the sapwood, none of the pit membranes appeared lignified and pit membranes were seldorn incrusted. In the heartwood, material that strongly absorbed ultraviolet light was heavily deposited on intervascular, interparenchyma, vessel-parenchyma, and fibre-parenchyma pit membranes. Secondary changes in the interfibre pit pairs were not so pronounced. Interfibre pit membranes were often absent in both the sapwood and the heartwood.