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植物研究 ›› 2017, Vol. 37 ›› Issue (4): 514-520.doi: 10.7525/j.issn.1673-5102.2017.04.005

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峨嵋蔷薇(Rosa omeiensis Rolfe)节瘤结构及其与植物自身关系的研究

马超1,2, 普布多吉1, 陈彬1, 徐爱国1, 蒋思萍1   

  1. 1. 西藏自治区高原生物研究所, 拉萨 850001;
    2. 中国农业科学院植物保护研究所, 北京 100193
  • 收稿日期:2016-12-30 出版日期:2017-07-15 发布日期:2017-07-22
  • 通讯作者: 陈彬,E-mail:32538503@qq.com E-mail:32538503@qq.com
  • 作者简介:马超(1982-),男,硕士研究生,主要从事药用植物研究。
  • 基金资助:
    西藏自治区地区自然科学基金(2015ZR-13-55)

Nodulation Structure in Rosa omeiensis Rolfe and Its Relationship with Itself

MA Chao1,2, PUBU Duoji1, CHEN Bin1, XU Ai-Guo1, JIANG Si-Ping1   

  1. 1. Tibet Plateau Institute of Biology, Lhasa 850001;
    2. Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100193
  • Received:2016-12-30 Online:2017-07-15 Published:2017-07-22
  • Supported by:
    Natural Science Foundation of Xizang(Tibet) Autonomous Region(2015ZR-13-55)

摘要: 研究了西藏自治区拉萨市雄色保护区内不同海拔环境中峨嵋蔷薇节瘤结构、发生的情况、发生规律及其功能的生态学效应。结果显示:(1)峨嵋蔷薇节瘤是由木质部增生致密组织形成不规则的无髓的轮纹结构,节瘤膨大由于分生组织形成植物肿瘤,由大量大小宽10~15 μm×长25 μm×高30 μm的细胞组成。(2)节瘤的发生与植物自身的生长状况显著相关,节瘤发生的密度与海拔梯度的关系不大.而与盖度和植株的高度具有显著的相关性(P=0.0081<0.01)。(3)研究区域尺度范围内,峨嵋蔷薇是区域内离散分布的重要种群,可见的节瘤枝干年龄大于9年,通过节瘤实现灌丛中个体的自疏作用,保持灌丛和整个种群的竞争优势。结论:峨嵋蔷薇的节瘤是与植物自身协同进化过程中形成,节瘤实现灌丛中个体相对快速增长和死亡,实现灌丛内个体在疏减,该文丰富了自疏现象的表现形式。

关键词: 峨嵋蔷薇, 节瘤, 重要值, 自疏作用

Abstract: We studied the occurrence of nodulation on Rosa omeiensis Rolfe and their regularity as well as the reasons of nodulation in the area of Xiongse Nature Reserve of Lasa in Tibet Autonomous Region, and checked the ecology effect of distribution of R.omeiensis on other shrubs Results show that:(1)The nodulation was organized by the hyperplasia of xylem, dense tissue forming irregular annulation without pulp. Its enlargement due to meristem tissue formation of plant tumors, which mainly formed by the square cells size of about 10-15 μm×25 μm×30 μm; (2)The occurrence of nodulation is closely related to the growth condition of its own. The relationship between the occurrence of nodulation, the density and the altitude gradient was not significantly great, while it has a significant correlation with the coverage and the height of the plant(P=0.0081<0.01); (3)Within the scale of the study area, nodulation can be found in over 9-year R.omeiensis, as an important species of discrete distribution in the area with no correlation with other brush. To maintain the competitive advantage of shrub and whole population, it was achieved by self-thinning effect with nodulation. The nodulation of R.omeiensis is formed in the long-term evolution process. The rapid growth and death of the individuals in the shrubs is realized through the nodulation. Through nodulation, the competitive advantage of brush and the entire population is kept.

Key words: Rosa omeiensis Rolfe, nodulation, importance value, self-thinning effect

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