三种同域分布喉毛花的繁殖分配

张 婵; 胡莉娟; 王 赟

引用本文:	张婵, 胡莉娟, 王赟.三种同域分布喉毛花的繁殖分配[J].广西植物,2014,(1):38-45.[点击复制]
	ZHANG Chan, HU Li-Juan, WANG Yun.Reproductive allocation of three sympatric Comastoma(Gentianaceae)species[J].Guihaia,2014,(1):38-45.[点击复制]

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三种同域分布喉毛花的繁殖分配
张婵, 胡莉娟, 王赟
1. 中国科学院昆明植物研究所资源植物与生物技术所级重点实验室, 昆明 650204;2. 济南市城市园林绿化局, 济南 250033;3. 青藏高原研究所昆明部, 昆明 650204;4. 中国科学院大学, 北京 100049

摘要:

以青藏高原高寒草甸中三种同域分布的喉毛花为研究对象,通过比较三个种的植株性状和繁殖分配,探讨繁殖分配的种间差异及其与植株个体大小的关系。结果表明:(1)三个种的植株高度、顶花大小和单株花数目、繁殖分配均存在种间差异,这可能与其各自的交配系统和具体的生境以及相应的生活史对策有关;(2)在三种喉毛花中,投入到营养器官和繁殖器官的绝对资源量均呈显著正相关,未检测到植株生长和繁殖间的权衡关系;(3)三个种的个体大小与繁殖器官生物量均呈显著正相关,而与繁殖分配均呈显著负相关,这表明个体越大,繁殖投入越高,而繁殖分配越低,与以往研究结果一致,这可能是由于繁殖分配与个体大小之间存在异速关系。

关键词: 喉毛花属繁殖分配生活史个体大小效应异速关系青藏高原

DOI：10.3969/j.issn.1000-3142.2014.01.008

分类号:Q948

基金项目:

Reproductive allocation of three sympatric Comastoma(Gentianaceae)species

ZHANG Chan^1,4*, HU Li-Juan², WANG Yun³

1. Key Laboratory of Economic Plants and Biotechnology, Kunming Institute of Botany, CAS, Kunming 650204, China;2. Jinan Municipal Bureau of Landscape and Forestry, Jinan 250033, China;3. Institute of Tibetan Plateau at Kunming, Kunming 650204, China;4. University of the Chinese Academy of Sciences, Beijing 100049, China

Abstract:

Resource allocation strategy is central to plant life-history theory and thus receive extensive attention of ecologists and evolutionists. However,there are few research about the resource allocation strategies of sympatric species of the same genus. We studied the plant traits and reproductive allocation of three sympatric Comastoma species which are all alpine annual herbs of the Qinghai-Tibet Plateau. Our results were as follows:(1)there were significant differences in plant height,flower number every plant,top flower size and reproductive allocation among three species due to their different mating systems,habitats and life-history strategies;(2)in all three species,there was positive relationship between resource allocation of vegetative organs and reproductive organs,and no trade-off between vegetative growth and reproduction was found;(3)the reproductive investment increased but the proportion of reproduction(reproductive allocation)decreased with increased individual size,which was consistent with the previous conclusions,indicating size-dependency of reproductive allocation and this might be resultant from the allometric relationship between reproductive allocation and individual size.

Key words: Comastoma reproductive allocation life-history size-dependent effect allometric relationship the Qinghai-Tibet Plateau