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植物生态学报 >

2014 , Vol. 38 >Issue 4: 366 - 374

DOI: https://doi.org/10.3724/SP.J.1258.2014.00033

研究论文

青藏高原东缘不同海拔波缘风毛菊资源分配及花部特征对种子数目和质量的影响

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  • 西北师范大学生命科学学院, 兰州 730070
*E-mail:wangyifeng6481@aliyun.com

收稿日期: 2013-11-11

  录用日期: 2014-02-17

  网络出版日期: 2014-04-08

基金资助

甘肃省自然科学基金项目(1208RJZA-126);兰州市科技局技术支撑项目: 中国楤木多糖化学结构及降血糖项目(2013-4-28);甘肃省生态生物学重点学科项目

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Effects of resource allocation and floral traits on the number and mass of Saussurea undulata seeds from different elevations in eastern Qinghai-Xizang Plateau

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  • College of Life Sciences, Northwest Normal University, Lanzhou 730070, China

Received date: 2013-11-11

  Accepted date: 2014-02-17

  Online published: 2014-04-08

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摘要

通过采样调查法和烘干称量法检测了青藏高原东缘不同海拔种群波缘风毛菊(Saussurea undulata)花期与果期的形态特征, 研究了其花期与果期的资源分配, 并对花期花部特征对果期种子特征的影响作出分析。结果表明: 1)波缘风毛菊在花期将更多的资源投入繁殖器官, 而在果期增加了对种子的资源投资; 2)波缘风毛菊花期部分花部特征的变异导致其果期产生的种子随海拔升高数量减少、百粒重增加, 因为波缘风毛菊需要在高寒草甸的极端环境下保证每粒种子的存活能力, 因此采取了产生更少但更大种子的生存策略。

关键词： 海拔; 繁殖; 资源; 权衡

本文引用格式

王一峰, 岳永成 . 青藏高原东缘不同海拔波缘风毛菊资源分配及花部特征对种子数目和质量的影响[J]. 植物生态学报, 2014 , 38(4) : 366 -374 . DOI: 10.3724/SP.J.1258.2014.00033

Abstract

Aims This paper studies the resource allocation during flowering and fruiting, as well as the relationship between variations in floral traits and seed characters in Saussurea undulata.
Methods Field sampling and measurements of dry mass were used to evaluate morphological characteristics of S. undulata distributed at different elevations in eastern Qinghai-Xizang Plateau.
Important findings Saussurea undulata invested more resources in the reproductive organs during flowering, whereas it invested more resources in seed during fruiting. The variations in floral traits during flowering led to a decline in seed number and an increase in 100-seed mass in S. undulate during fruiting with increasing elevation, because the species adopted survival strategies that produce less but larger seed to ensure survival of each seed under the extreme environment of alpine meadow in eastern Qinghai-Xizang Plateau.

Key words： elevation; reproduction; resource; trade-off

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