冰川退缩地15种丛藓科植物茎的比较结构学观察

doi:10.7525/j.issn.1673-5102.2019.01.001

摘要/Abstract

摘要： 应用石蜡切片和扫描电镜方法对一号冰川退缩地生长的15种丛藓科植物茎的结构及表面微形态特征进行观察，结果表明：该地区的15种丛藓科植物的茎分为具中轴和无中轴两类，其细胞壁均有不同程度的加厚。而具中轴的丛藓科植物的茎又分为表皮、皮部、中轴三部分，茎表皮细胞短，1层，细胞壁大多向外突出，表面粗糙，表面纹饰多为颗粒状；皮部所占面积最大，大部分有内、外皮部的分化，大多数种的细胞壁由外向内逐渐变薄，细胞由小到大整齐排列；中轴所占的面积也不同，其细胞壁多具角隅加厚；而没有中轴分化的种类，其各自细胞壁加厚的程度基本一致。

关键词: 冰川退缩地, 丛藓科, 茎, 解剖结构

Abstract: We used paraffin sections and scanning electron microscopy(SEM) to observe the structure and surface micromorphological characteristics of the stems of 15 species of Pottiaceae that grown from the retreat of Glacier No.1. The stem of Pottiaceae was divided into two types with central axis and no central axes. The cell walls were thickened to different degrees. The stems of central axis were divided into three parts of epidermal, cortex and central axis. Stem epidermis cells are short with one layer, most of the cell wall protrudes outward, the surface is rough, and the surface decoration is mostly granular. The cortex is the largest area, most of which have differentiation of the inner and outer skin. The cell walls of most species gradually become thinner from the outside to the inside, and the cells are orderly arranged from small to large. The area of the central axis is also different, the cell wall corner is thickened. For no central axes, the cell walls were thickened to the same extent.

Key words: glacier retreat, Pottiaceae, stem, anatomic features

中图分类号:

Q914.84

艾菲热;阿布都艾尼, 陈秋艳, 王虹, 耿若楠, 吴玉环. 冰川退缩地15种丛藓科植物茎的比较结构学观察[J]. 植物研究, 2019, 39(1): 1-9.

AIFEIRE Abuduaini, CHEN Qiu-Yan, WANG Hong, GENG Ruo-Nan, WU Yu-Huan. Comparative Structural Observation of Stems of 15 Species in Pottiaceae from the Glacier Retreat[J]. Bulletin of Botanical Research, 2019, 39(1): 1-9.

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