竹环中维管束分布密度和纤维鞘组织比量纵向变异研究

A Study of Longitudinal Variation of Vascular Bundles Distribution Density and Fiber Sheath Tissue Proportion in Internode of Moso Bamboo

以毛竹为研究对象,研究了毛竹竹环中维管束分布密度和纤维鞘组织比量纵向变异。通过微细砂纸抛光结合高清扫描的方式获得竹环横切面,采用Image-Pro Plus等图像处理软件采集竹环横切面尺寸及维管束数量、纤维鞘面积等数据,计算竹环中维管束的分布密度、纤维鞘组织比量。结果表明:以微细砂纸抛光结合高清扫描的方式获得的竹环横切面用于维管束数量、面积计算,准确、可行;同一株毛竹,上部竹节间维管束的分布密度和纤维鞘的组织比量大于下部;在同一节间内,维管束的分布密度、纤维鞘的组织比量也随竹环的位置升高而略有增加。毛竹竹环中维管束分布密度和纤维鞘组织比量随高度的增加而增加。

Taking the Moso bamboo(Phyllostachys pubescens)as the research object,the paper studied the longitudinal variation of vascular bundle distribution density and fiber sheath tissue proportion in bamboo internodes.The cross-section of bamboo rings were obtained through fine sandpaper polishing combined with high-definition(HD)scanning method.Image-pro Plus and other image processing software were used to collect the data on cross-section size of bamboo node,the number of vascular bundles,fiber sheath area and the others,to calculate the distribution density of vascular bundles and fiber sheath tissue proportion in bamboo internodes.The results showed that the method of fine sandpaper polishing combined with HD scanning were accurate and feasible for the calculation of the number and area of vascular bundles.The distribution density of internode vascular bundles and the tissue proportion of fiber sheath in upper part of the same culm were larger than those in the lower part.Within the same internode,the distribution density of vascular bundle and the tissue proportion of fiber sheath also increased slightly with the growth of internode.The distribution density of vascular bundle and fiber sheath tissue proportion in the bamboo internodes increased with the height of culm.