川西风毛菊花期资源分配随海拔的变化

doi:10.17521/cjpe.2015.0086

摘要/Abstract

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: Aims

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

Methods

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

Important findings

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

王一峰, 靳洁, 侯宏红, 赵博, 曹家豪, 李筱姣. 川西风毛菊花期资源分配随海拔的变化. 植物生态学报, 2015, 39(9): 901-908. DOI: 10.17521/cjpe.2015.0086

WANG Yi-Feng,JIN Jie,HOU Hong-Hong,ZHAO Bo,CAO Jia-Hao,LI Xiao-Jiao. Changes in flowering resource allocation of Saussurea dzeurensis with elevations. Chinese Journal of Plant Ecology, 2015, 39(9): 901-908. DOI: 10.17521/cjpe.2015.0086

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链接本文: https://www.plant-ecology.com/CN/10.17521/cjpe.2015.0086

https://www.plant-ecology.com/CN/Y2015/V39/I9/901

图/表 8

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种群 Population	采集日期 Collection date (year-month-day)	采集地点 Collection site	海拔 Elevation (m)	经纬度 Longitude and latitude	生境 Habitat
1	2013-8-21	夏河至合作途中 On the way from Xiahe to Hezuo	2 750	102.61° E, 36.45° N	山坡灌丛 Hillside shrub
2	2013-8-21	夏河至合作途中 On the way from Xiahe to Hezuo	2 750	102.60° E, 36.45° N	山坡灌丛 Hillside shrub
3	2013-8-22	合作扎油沟 Zhayou furrow in Hezuo	2 900	102.90° E, 36.87° N	灌丛 Shrub
4	2013-8-22	合作扎油沟 Zhayou furrow in Hezuo	2 900	102.81° E, 36.93° N	山坡草地 Hillside meadow
5	2013-8-22	合作当周沟 Dangzhou furrow in Hezuo	3 050	103.42° E, 34.32° N	山坡灌丛 Hillside shrub
6	2013-8-22	合作当周沟 Dangzhou furrow in Hezuo	3 050	103.41° E, 34.32° N	山坡灌丛 Hillside shrub
7	2013-8-23	卓尼大峪沟 Dayu furrow in Jonê	3 200	102.89° E, 35.95° N	山坡草地 Hillside meadow
8	2013-8-23	卓尼大峪沟 Dayu furrow in Jonê	3 200	102.86° E, 35.84° N	灌丛 Shrub
9	2013-8-23	碌曲至玛曲途中 On the way from Luqu to Maqu	3 300	103.35° E, 34.57° N	山坡草地 Hillside meadow
10	2013-8-23	碌曲至玛曲途中 On the way from Luqu to Maqu	3 300	103.30° E, 34.52° N	山坡草地 Hillside meadow
11	2013-8-24	玛曲拱坝四队 Gongbai Fourst Team in Maqu	3 500	103.31° E, 34.52° N	灌丛 Shrub
12	2013-8-24	玛曲拱坝四队 Gongbai Fourst Team in Maqu	3 500	103.32° E, 34.53° N	灌丛 Shrub
13	2013-8-24	玛曲金矿附近 Close by gold ore in Maqu	3 600	103.48° E, 34.47° N	草地 Meadow
14	2013-8-24	玛曲金矿附近 Close by gold ore in Maqu	3 600	103.45° E, 34.49° N	草地 Meadow
15	2013-8-24	玛曲阿万仓大山 Awancang Mountain in Maqu	3 700	102.40° E, 34.48° N	山坡草地 Hillside meadow
16	2013-8-24	玛曲阿万仓大山 Awancang Mountain in Maqu	3 700	102.41° E, 34.50° N	山坡草地 Hillside meadow

种群 Population	采集日期 Collection date (year-month-day)	采集地点 Collection site	海拔 Elevation (m)	经纬度 Longitude and latitude	生境 Habitat
1	2013-8-21	夏河至合作途中 On the way from Xiahe to Hezuo	2 750	102.61° E, 36.45° N	山坡灌丛 Hillside shrub
2	2013-8-21	夏河至合作途中 On the way from Xiahe to Hezuo	2 750	102.60° E, 36.45° N	山坡灌丛 Hillside shrub
3	2013-8-22	合作扎油沟 Zhayou furrow in Hezuo	2 900	102.90° E, 36.87° N	灌丛 Shrub
4	2013-8-22	合作扎油沟 Zhayou furrow in Hezuo	2 900	102.81° E, 36.93° N	山坡草地 Hillside meadow
5	2013-8-22	合作当周沟 Dangzhou furrow in Hezuo	3 050	103.42° E, 34.32° N	山坡灌丛 Hillside shrub
6	2013-8-22	合作当周沟 Dangzhou furrow in Hezuo	3 050	103.41° E, 34.32° N	山坡灌丛 Hillside shrub
7	2013-8-23	卓尼大峪沟 Dayu furrow in Jonê	3 200	102.89° E, 35.95° N	山坡草地 Hillside meadow
8	2013-8-23	卓尼大峪沟 Dayu furrow in Jonê	3 200	102.86° E, 35.84° N	灌丛 Shrub
9	2013-8-23	碌曲至玛曲途中 On the way from Luqu to Maqu	3 300	103.35° E, 34.57° N	山坡草地 Hillside meadow
10	2013-8-23	碌曲至玛曲途中 On the way from Luqu to Maqu	3 300	103.30° E, 34.52° N	山坡草地 Hillside meadow
11	2013-8-24	玛曲拱坝四队 Gongbai Fourst Team in Maqu	3 500	103.31° E, 34.52° N	灌丛 Shrub
12	2013-8-24	玛曲拱坝四队 Gongbai Fourst Team in Maqu	3 500	103.32° E, 34.53° N	灌丛 Shrub
13	2013-8-24	玛曲金矿附近 Close by gold ore in Maqu	3 600	103.48° E, 34.47° N	草地 Meadow
14	2013-8-24	玛曲金矿附近 Close by gold ore in Maqu	3 600	103.45° E, 34.49° N	草地 Meadow
15	2013-8-24	玛曲阿万仓大山 Awancang Mountain in Maqu	3 700	102.40° E, 34.48° N	山坡草地 Hillside meadow
16	2013-8-24	玛曲阿万仓大山 Awancang Mountain in Maqu	3 700	102.41° E, 34.50° N	山坡草地 Hillside meadow