Reproductive allocation in a dioecious perennial Oxyria sinensis (Polygonaceae) along altitudinal gradients

doi:10.3724/SP.J.1002.2008.08041

	Reproductive allocation in a dioecious perennial Oxyria sinensis (Polygonaceae) along altitudinal gradients
	Zhao, Fang 1,2; Yang, Yong-Ping1
通讯作者	yangyp@mail.kib.ac.cn
	2008-11-01
发表期刊	JOURNAL OF SYSTEMATICS AND EVOLUTION
ISSN	0529-1526
卷号	46 期号:6 页码:830-835
摘要	The reproductive allocation (RA, the ratio of flower biomass to total aboveground biomass) of Oxyria sinensis Hemsl., a clonal dioecious perennial, was compared among five populations along an altitudinal gradient from 1978 in to 2780 in. The goal of this study is to answer the following questions: (1) What is the variation in the reproductive allocation of O. sinensis? (2) Does variation in reproductive allocation correspond to an altitudinal gradient? (3) Is the reproductive allocation of male and female O. sinensis correlated to environmental factors? We found that reproductive allocation to ramets decreased with increasing vegetative biomass in both male and female plants. Increasing altitude corresponds to a decrease in height of ramets, total aboveground biomass, and biomass of vegetative organs in both male and female plants. The total aboveground biomass of male ramets was significantly higher than female ramets in the populations at the altitudes of 2422 in and 2780 in. The biomass of flowers and reproductive allocation of male ramets were significantly higher than of female ramets at all populations except at the lowest altitude population, which indicated male ramets allocate more biomass to reproduction than female ramets. Our results do not support the idea of an invariable minimum vegetative biomass for reproduction, probably because resource can be shared among ramets within one ramet system of a clonal species, and the pattern of RA in O. sinensis might be an adaptation to the unpredictable rain and decreased pollinator visitation in the higher altitudinal populations.; The reproductive allocation (RA, the ratio of flower biomass to total aboveground biomass) of Oxyria sinensis Hemsl., a clonal dioecious perennial, was compared among five populations along an altitudinal gradient from 1978 in to 2780 in. The goal of this study is to answer the following questions: (1) What is the variation in the reproductive allocation of O. sinensis? (2) Does variation in reproductive allocation correspond to an altitudinal gradient? (3) Is the reproductive allocation of male and female O. sinensis correlated to environmental factors? We found that reproductive allocation to ramets decreased with increasing vegetative biomass in both male and female plants. Increasing altitude corresponds to a decrease in height of ramets, total aboveground biomass, and biomass of vegetative organs in both male and female plants. The total aboveground biomass of male ramets was significantly higher than female ramets in the populations at the altitudes of 2422 in and 2780 in. The biomass of flowers and reproductive allocation of male ramets were significantly higher than of female ramets at all populations except at the lowest altitude population, which indicated male ramets allocate more biomass to reproduction than female ramets. Our results do not support the idea of an invariable minimum vegetative biomass for reproduction, probably because resource can be shared among ramets within one ramet system of a clonal species, and the pattern of RA in O. sinensis might be an adaptation to the unpredictable rain and decreased pollinator visitation in the higher altitudinal populations.
关键词	Dioecy Oxyria Sinensis Reproductive Allocation
学科领域	Plant Sciences
DOI	10.3724/SP.J.1002.2008.08041
收录类别	SCI
语种	英语
WOS记录号	WOS:000261400000003
引用统计
文献类型	期刊论文
条目标识符	http://ir.kib.ac.cn/handle/151853/2647
专题	中国科学院青藏高原研究所昆明部
作者单位	1.Chinese Acad Sci, Kunming Inst Bot, Kunming 650204, Peoples R China 2.Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Zhao, Fang,Yang, Yong-Ping. Reproductive allocation in a dioecious perennial Oxyria sinensis (Polygonaceae) along altitudinal gradients[J]. JOURNAL OF SYSTEMATICS AND EVOLUTION,2008,46(6):830-835.
APA	Zhao, Fang,&Yang, Yong-Ping.(2008).Reproductive allocation in a dioecious perennial Oxyria sinensis (Polygonaceae) along altitudinal gradients.JOURNAL OF SYSTEMATICS AND EVOLUTION,46(6),830-835.
MLA	Zhao, Fang,et al."Reproductive allocation in a dioecious perennial Oxyria sinensis (Polygonaceae) along altitudinal gradients".JOURNAL OF SYSTEMATICS AND EVOLUTION 46.6(2008):830-835.

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