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Reproductive allocation in a dioecious perennial Oxyria sinensis (Polygonaceae) along altitudinal gradients
Zhao, Fang1,2; Yang, Yong-Ping1
2008-11-01
发表期刊JOURNAL OF SYSTEMATICS AND EVOLUTION
ISSN0529-1526
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
DOI10.3724/SP.J.1002.2008.08041
收录类别SCI
语种英语
WOS研究方向Plant Sciences
WOS类目Plant Sciences
WOS记录号WOS:000261400000003
引用统计
被引频次:6[WOS]   [WOS记录]     [WOS相关记录]
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
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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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