巨龙竹营养器官解剖学研究

对巨龙竹根、茎、叶等营养器官的显微结构进行了解剖学研究,对其竹笋发育中各细胞的形态特征进行了观察与分析,结果发现：巨龙竹茎的顶端结构为原套—原体结构(原套为1层细胞),在旺盛发育的幼茎的节和节间细胞中,有丰富的淀粉粒;秆茎的节间维管束为断腰型和双断腰型,节部维管束的木质部导管与韧皮部筛管的排列均无规律,并具有多层密集的细胞组成的“韧皮部结”;叶肉细胞包括指状内摺的臂细胞、不规则细胞及放射状细胞,并在维管束两侧具有无色透明的大型梭形细胞,其中脉的维管束往往与许多小维管束交织在一起形成一个复合的维管系统;根的顶端原始细胞为圆锥状排列的原始细胞群,未见典型的组织原分区。

Anatomical Studies on Vegetative Organs of Dendrocalamus sinicus

Anatomical studies on the vegetative organs(root, shoot and leaf) of Dendrocalamus sinicus were made by microscopic observation. It was showed by the studies that:The apical structure of young culm was typical tunica- corpus. The tunica was formed by a layer of cells, and there were abundant starch granules in the cells of young culm.The vascular strands in the culm inter-nodes belonged to broken-waist type and double broken-waist type. The arrangement of xylem ducts and phloem sieve tubes of the vascular strands in the nodes was irregular, in which there were some particular "phloem ganglion".There were three kinds of mesophyll cells in the leaf: one was arm-cell with finger formed folds, the other two were irregular cells and radial cells. There were some large shuttle formed cells on both sides of the vascular strands. The midrib was a complex vascular system that was composed of several vascular strands.The apical initial cells of the root top were arranged in cone shape and no typical histogen zones were found.