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扁秆荆三棱球茎萌苗种群的大小级及生长速率研究

宁宇 董树斌 张志翔 崔丽娟 赵良成

宁宇, 董树斌, 张志翔, 崔丽娟, 赵良成. 扁秆荆三棱球茎萌苗种群的大小级及生长速率研究[J]. 北京林业大学学报, 2015, 37(2): 107-112. doi: 10.13332/j.cnki.jbfu.2015.02.013
引用本文: 宁宇, 董树斌, 张志翔, 崔丽娟, 赵良成. 扁秆荆三棱球茎萌苗种群的大小级及生长速率研究[J]. 北京林业大学学报, 2015, 37(2): 107-112. doi: 10.13332/j.cnki.jbfu.2015.02.013
NING Yu, DONG Shu-bin, ZHANG Zhi-xiang, CUI Li-juan, ZHAO Liang-cheng. Growth rate dynamics and size variation of Bolboschoenus planiculmis population from tuber sprouting[J]. Journal of Beijing Forestry University, 2015, 37(2): 107-112. doi: 10.13332/j.cnki.jbfu.2015.02.013
Citation: NING Yu, DONG Shu-bin, ZHANG Zhi-xiang, CUI Li-juan, ZHAO Liang-cheng. Growth rate dynamics and size variation of Bolboschoenus planiculmis population from tuber sprouting[J]. Journal of Beijing Forestry University, 2015, 37(2): 107-112. doi: 10.13332/j.cnki.jbfu.2015.02.013

扁秆荆三棱球茎萌苗种群的大小级及生长速率研究

doi: 10.13332/j.cnki.jbfu.2015.02.013
基金项目: 

“十一五”国家科技支撑计划项目(2006BAD03A19)。

详细信息
    责任作者:

    第一作者: 宁宇,博士生。主要研究方向:克隆植物生态学与湿地生态学。Email:ningyu_sino@qq.com 地址:100083北京市清华东路35号北京林业大学357信箱。 责任作者: 张志翔,教授,博士生导师。主要研究方向:植物分类与系统、植物生殖生态和野生植物保护。Email:zxzhang@bjfu.edu.cn 地址:100083北京市清华东路35号北京林业大学159信箱。

    第一作者: 宁宇,博士生。主要研究方向:克隆植物生态学与湿地生态学。Email:ningyu_sino@qq.com 地址:100083北京市清华东路35号北京林业大学357信箱。 责任作者: 张志翔,教授,博士生导师。主要研究方向:植物分类与系统、植物生殖生态和野生植物保护。Email:zxzhang@bjfu.edu.cn 地址:100083北京市清华东路35号北京林业大学159信箱。

Growth rate dynamics and size variation of Bolboschoenus planiculmis population from tuber sprouting

  • 摘要: 产生不同大小的后代通常被视为对环境风险的一种两面下注策略,而研究也发现克隆植物远端构件可能具有生长优势。为了研究不同球茎类型和水分条件是否对球茎萌苗形成的分株种群的大小级产生影响,以及远端分株在生长速率上是否也存在优势,本文以扁秆荆三棱为对象开展了研究。设计了基于球茎类型(原生、次生和新生)和水分条件(湿润无积水、1~2 cm薄积水、10 cm水深)的区组实验,通过监测其分株高度和数目变化来进行比较。结果显示:1) 球茎类型和水分条件对扁秆荆三棱分株种群的大小有显著影响,但对克隆之间大小的变异没有显著影响;2) 随着水深的增加,分株数和高度都呈增加趋势,新生球茎萌苗形成的分株高度较低,但分株数在球茎类型间无显著差异;3) 分株生长速率只和克隆生长阶段有关,随着分株数增加,克隆和分株的生长速率都呈增大趋势,但是远端分株的生长速率并没有显著优势。因此,克隆植物大小级独立于环境条件的稳定性可以视作对资源的有效利用以及对环境风险进行缓冲的策略,而克隆规模对生长速率的促进可能是由于生理整合作用而导致的。远端分株生长速率无明显优势则说明远端分株可能更偏向于储藏和向克隆外探索。

     

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  • 收稿日期:  2013-08-11

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