单芽狗脊营养器官的解剖学研究  

Anatomical Study on Vegetative Organs of Woodwardia unigemmata

作　　者：叶红环 廖海民[1] 苟光前[1,2] 何选泽 郑涛 代朝霞[3] YE Honghuan;LIAO Haimin;GOU Guangqian;HE Xuanze;ZHENG Tao;DAI Zhaoxia(College of Life Science, Guizhou University, Guiyang 550025, China;Bamboo Research Institute, Guizhou University, Guiyang 550025, China;Forestry College, Guizhou University, Guiyang 550025, China)

机构地区：[1]贵州大学生命科学学院,贵阳550025 [2]贵州大学竹类研究所,贵阳550025 [3]贵州大学林学院,贵阳550025

出　　处：《西北植物学报》2019年第7期1154-1162,共9页Acta Botanica Boreali-Occidentalia Sinica

基　　金：国家科技支撑计划(2015BAD04B02)

摘　　要：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。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.

关 键 词：单芽狗脊 叶 叶柄 根状茎 根 珠芽 

分 类 号：Q944.53[生物学—植物学]