欢迎访问《应用生态学报》官方网站,今天是 分享到:

应用生态学报

• 研究报告 • 上一篇    下一篇

仙湖苏铁种群年龄判断及年龄结构特征

汪殿蓓1;暨淑仪2;陈飞鹏2;彭少麟3   

  1. 1孝感学院生命科学技术学院, 湖北孝感 432003;
    2华南农业大学生命科学学院, 广州 510642;
    3中山大学生命科学学院, 广州 510275
  • 收稿日期:2006-02-23 修回日期:2006-12-29 出版日期:2007-03-18 发布日期:2007-03-18

Age estimation and age structure of Cycas fairylakea population in Shenzhen City

WANG Dian-pei1; JI Shu-yi2; CHEN Fei-peng2; PENG Shao-lin3   

  1. 1College of Life Science and Technology, Xiaogan University, Xiaogan 432003, Hubei, China;
    2College of Life Science, South China Agricultural University, Guangzhou 510642, China;
    3College of Life Science, Sun Yat-sen University, Guangzhou 510275, China
  • Received:2006-02-23 Revised:2006-12-29 Online:2007-03-18 Published:2007-03-18

摘要: 根据苏铁类植株体残存的营养叶叶基数、开花痕数以及生长单元发生率等茎干特征, 建立了仙湖苏铁种群年龄判断方法,计算出该种群年龄. 进一步采用年龄结构图、年龄分布 曲线和曲线估计等方法,从基株和无性系水平探讨了仙湖苏铁种群的年龄结构特征.年龄结构 图显示,仙湖苏铁无性系种群为稳定种群,基株种群为衰退种群;年龄分布曲线和曲线估计结 果则表明仙湖苏铁无性系和基株种群均为衰退种群. 综合3种方法的分析结果,仙湖苏铁 种群为衰退种群,必须采取一定措施予以保护.

关键词: 苦瓜, 锌硼, 产量品质, 多胺, 激素, 活性氧代谢

Abstract: Based on the structural characteristics of Cycas trunk, including vegetative leaf base scars, sporophyll concave rings, and average occurrence probabilities of vegetative leaf and sporophyll, a method for the age estimation of Cycas fairylakea population was developed, and the age of each individual was calculated. Three approaches, i.e., age structure diagram, age distribution curve and curve estimation were used to study the age structure of C. fairylakea population at genet and clone population levels. The age structure diagram showed that the clone population of C. fairylakea was stable, but the genet population was in declining. However, both of the clone and genet populations were in declining when using the other two approaches. It was considered that the C. fairylakea population was in declining, and needed an urgent protection.

Key words: Balsam pear, Zinc and boron, Yield and quality, Polyamines, Hormone, Active oxygen metabolism