Results:The circular belt of sclereids in the phelloderm, secondaryxylemvessel order of the transverse section, and tetrarch of the primary xylem were microscopic characters.
结果：根横切面上栓内层的石细胞环带和次生木质部导管的排列方式、初生木质部为四原型等为显微鉴别特征；
2
The vessel elements of secondaryxylem in Tectona grandis are observed and studied by cell image analysis system and micrography.
运用细胞图象分析系统及显微照相的方法对柚木次生木质部导管分子进行了观察研究。
3
Many vessel numbers, small pore, libriform fibres (mechanical tissue)and obvious secondary thickening of xylem tissue are the features of adaptation to the environment.