单芽狗脊营养器官的解剖学研究

采用离析法和石蜡切片法对单芽狗脊营养器官进行形态解剖研究。结果表明：单芽狗脊叶为异面叶，上、下表皮细胞均为不规则型，仅下表皮有气孔器分布；叶柄维管束有2~6个，自叶柄基部向上至叶轴仅有2个较大的维管束；根状茎薄壁细胞之间有多个维管束散生分布，且富含丰富的淀粉粒；皮层在根的横切结构中占比较大，木质部的发育方式为外始式；单芽狗脊珠芽的发育过程分为三个阶段，珠芽原基的形成期、珠芽原基的分化期、成熟期。

Anatomical Study on Vegetative Organs of Woodwardia unigemmata

The morphological anatomy of the vegetative organs of the Woodwardia unigemmata was studied by the method of segregation and paraffin sectioning. It indicated that: W. unigemmata leaves were heterologous leaves. The upper and lower epidermis cells were irregular, and only the lower epidermis had stomatal distribution. There are 2 to 6 vascular bundles in petiole, only 2 larger vascular bundles from petiole base up to leaf axis. Rhizome have multiple vascular bundles scattered among the parenchyma cells, and rich starch grains in parenchyma cells. Cortex takes up a large proportion in the transverse structure of roots, and xylem develops in an exogenous manner. The development process of W. unigemmata bulbil can be divided into three stages: the formation stage of bulbil primordium, the differentiation stage and the maturation stage of bulbil primordium.