Chinese Journal of Plant Ecology >
Variation of reproductive allocation along elevations in Saussurea stella on East Qinghai- Xizang Plateau
Received date: 2012-04-16
Accepted date: 2012-08-20
Online published: 2012-11-09
Aims Our objective is to study the variation in floral traits of Saussurea stella in 20 populations in response to elevation and mean plant size on the East Qinghai-Xizang Plateau.
Methods We used population means to evaluate sources of variation in reproductive allocation within species. In addition, we used the sample investigation method and dry weight to evaluate biomass.
Important findings Reproductive allocation is negatively correlated with mean plant size. There are trade-offs of resource allocation in reproductive biomass and vegetative biomass, capitulum number and its weight, male and female as well as filament and pollen. Additionally, there is a relationship between variation in floral traits of S. stella and elevation. Consequently, the variation of floral traits ensures that S. stella pollinates effectively and completes sexual reproduction.
Key words: elevation; reproductive allocation; Saussurea stella; size-dependent; trade-off
WANG Yi-Feng, LI Mei, LI Shi-Xiong, GUO Jie, CHEN Yu-Ping, WANG Rui-Xue . Variation of reproductive allocation along elevations in Saussurea stella on East Qinghai- Xizang Plateau[J]. Chinese Journal of Plant Ecology, 2012 , 36(11) : 1145 -1153 . DOI: 10.3724/SP.J.1258.2012.01145
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