植物生态学报 ›› 2015, Vol. 39 ›› Issue (9): 901-908.DOI: 10.17521/cjpe.2015.0086

所属专题: 青藏高原植物生态学:种群生态学

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川西风毛菊花期资源分配随海拔的变化

王一峰*(), 靳洁, 侯宏红, 赵博, 曹家豪, 李筱姣   

  1. 西北师范大学生命科学学院, 兰州 730070
  • 收稿日期:2014-12-05 接受日期:2015-05-20 出版日期:2015-09-03 发布日期:2015-09-23
  • 通讯作者: 王一峰
  • 作者简介:

    *作者简介: E-mail:wangyifeng6481@aliyun.com

  • 基金资助:
    国家自然科学基金(31460105)、国家中医药管理局项目(201207002)、甘肃省自然科学基金(1208RJZA126)、兰州市科技局项目(2013-4-89)和甘肃省生态学、生物学重点学科项目

Changes in flowering resource allocation of Saussurea dzeurensis with elevations

WANG Yi-Feng*(), JIN Jie, HOU Hong-Hong, ZHAO Bo, CAO Jia-Hao, LI Xiao-Jiao   

  1. College of Life Science, Northwest Normal University, Lanzhou 730070, China
  • Received:2014-12-05 Accepted:2015-05-20 Online:2015-09-03 Published:2015-09-23
  • Contact: Yi-Feng WANG
  • About author:

    # Co-first authors

摘要:

以分布于青藏高原东缘的川西风毛菊(Saussurea dzeure)为试验材料, 研究了其位于不同海拔高度的16个种群的花期资源分配。结果显示: 1)花期植物个体大小、头状花序数量、繁殖器官及营养器官生物量、花瓣质量、雌蕊及雄蕊群质量均与海拔呈负相关关系, 每个头状花序质量与海拔呈正相关关系; 2)繁殖分配和雄性分配与海拔呈正相关关系, 营养分配和雌性分配与海拔呈负相关关系; 3)花期头状花序的数量和大小、繁殖分配和营养分配以及雄性分配和雌性分配之间均存在资源分配上的权衡。由此推论: 1)海拔作为外界因子对川西风毛菊花期各生物量及资源分配有显著的影响; 2)在资源有限的情况下, 川西风毛菊权衡对各结构的资源投入, 通过增加繁殖分配和雄性分配来适应胁迫环境, 提高繁殖的成功率。

关键词: 海拔, 繁殖分配, 川西风毛菊, 性分配, 权衡

Abstract: <i>Aims</i>

Our objective is to study the effect of elevation on the reproductive allocation and sexual allocation of Saussurea dzeurensis during the flowering season.

<i>Methods</i>

We used the field investigation method and dry mass method to evaluate morphological characteristics of S. dzeurensis at different elevations.

<i>Important findings</i>

Elevation had a significant impact on the biomass and resource allocation of S. dzeurensis; reproductive allocation and male allocation were positively correlated with elevation, but vegetative allocation and female allocation were negatively correlated with elevation; there was a trade-off of resource allocation between capitulum number and mass, between reproductive allocation and vegetative allocation, and between male allocation and female allocation; When resources were limiting, the resource input of every structure of S. dzeurensis was balanced by increasing reproductive allocation and sexual allocation so that the plant can adapt to the stressful environment and have high rate of reproductive success.

Key words: elevation, reproductive allocation, Saussurea dzeurensis, sexual allocation, trade-off