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植物研究 ›› 2020, Vol. 40 ›› Issue (4): 481-489.doi: 10.7525/j.issn.1673-5102.2020.04.001

• 研究报告 •    

喀斯特天坑内孔雀藓属蒴齿亚显微结构研究

吴金1, 张朝晖1, 王智慧2   

  1. 1. 贵州师范大学贵州省山地环境信息系统与生态环境保护重点实验室, 贵阳 550001;
    2. 贵州师范大学生命科学学院, 贵阳 550001
  • 收稿日期:2019-11-19 发布日期:2020-06-12
  • 通讯作者: 张朝晖,E-mail:academiclife@126.com E-mail:academiclife@126.com
  • 作者简介:吴金(1993-),女,硕士研究生,主要从事生态学方面的研究。
  • 基金资助:
    国家自然科学基金(31760050,31960044,31760043);黔科合平台人才([2017]5726)项目

Peristome Submicro Structure of Hypopterygium in Karst Tiankeng

WU Jin1, ZHANG Zhao-Hui1, WANG Zhi-Hui2   

  1. 1. Key Laboratory for Information System of Mountainous Area and Protection of Ecological Environment of Guizhou Province, Guizhou Normal University, Guiyang 550001;
    2. School of Life Sciences, Guizhou Normal University, Guiyang 550001
  • Received:2019-11-19 Published:2020-06-12
  • Supported by:
    National Natural Science Foundation(31760050,31960044,31760043);DSTFGC([2017]5726)

摘要: 喀斯特天坑微环境对植物结构特征有显著的影响。采用扫描电子显微镜,探究孔雀藓属蒴齿在喀斯特天坑内的亚显微结构,旨在为微环境下藓类植物蒴齿结构特征研究提供参考。研究结果表明:①基于蒴齿的亚显微形态研究,孔雀藓属两个种,即黄边孔雀藓(Hypopterygium flavo-limbatum C.Muell)、东亚孔雀藓(Hypopterygium japonicum Mitt)蒴齿双齿层,内外齿层数均为16枚,外齿层背面均具"Z"字形的中脊,齿片形态、曲向、外齿层背侧脊纹、齿条腹侧横纹以及是否具节瘤具有明显的差异,属于稳定性特征,可作为系统分类的依据;而齿片长度、宽度、节片数、横脊数、中脊数,属于可变性特征,受环境因子的影响,在运用藓类植物蒴齿作为系统分类依据时应作性状的筛选。②光照度、空气温度、空气湿度以及海拔是影响天坑内黄边孔雀藓(H.flavo-limbatum)蒴齿形态结构发育生长的主要环境因子,空气湿度、光照度以及人为干扰度是影响天坑内东亚孔雀藓(H.japonicum)蒴齿形态结构发育生长的主要环境因子。两种孔雀藓属植物蒴齿结构受湿度的影响最大,其生境多为湿度大、土壤含水量丰富的环境。

关键词: 喀斯特天坑, 孔雀藓属, 蒴齿, 亚显微结构

Abstract: The microenvironment of Karst Tiankeng has a significant effect on the characteristicsof plant structure.In order to provide reference for the structural adaptation of the peristome of moss in the microenvironment, the submicrostructure of the peristome of the Hypopterygium in the karst Tiankeng was studied by scanning electron microscope (SEM).From the submicroscopic morphology of peristome, two species of Hypopterygium, named H.flavo-limbatum C.Muell and H.japonicum Mitt, have obvious differences in the shapeof their dentium, tropism of dentium, dorsal ridges of the exstomium, ventral lateral stripes of the processus and whether they have ganglioma or not.It belongs to the characteristic of stability and can be used as the basis of system classification. On the other hand, the length and width of dentium, number of plates, transverse raphe and middle raphe are variable characteristics, which should be screened when the peristome of mosses are used as the basis of systematic classification.Illuminance, air temperature, air humidity and altitude are the main environmental factors affecting the development and growth of peristome morphological and structural of H.flavo-limbatum in Tiankeng. Air humidity, illuminance and artificial interference are the main environmental factors affecting the development and growth of peristome morphological and structural of H.japonicum in Tiankeng. Both of the peristome structures of two species of Hypopterygium are most affected by humidity, andtheir habitats are mostly humid and rich in soil moisture.

Key words: Karst Tiankeng, Hypopterygium, peristome, submicroscopic structure

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