干旱区生态环境知识资源中心(Arid): 不同水分下准噶尔无叶豆分株种群特征和生物量分配差异

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	不同水分下准噶尔无叶豆分株种群特征和生物量分配差异
其他题名	Ramet population characteristics and biomass allocation of Eremosparton songoricum growing under different water conditions
	王建成; 施翔; 张道远; 尹林克
ISSN	1000-0933
出版年	2009
卷号	29 期号:12 页码:6475-6481
中文摘要	准噶尔无叶豆是豆科无叶豆属小半灌木,在中国仅片断化分布于新疆古尔班通古特沙漠局部区域.该种自然种群种子萌发率极低(<3%),主要靠克隆繁殖维持种群.为研究克隆生长在异质性生境中的可塑性特征及其生态适应意义,对生境土壤含水量存在差异的两个准噶尔无叶豆自然种群(河边种群,沙漠种群)的分株种群特征、生物量及其分配比重进行了比较,研究发现:①在分株种群特征上,河边种群的分株显著高于沙漠种群,分株间距也显著大于沙漠种群.沙漠种群分株密度和根的密度显著大于河边种群,但每一分株拥有根的概率显著小于河边种群;②在生物量分配方面,河边种群具有比沙漠种群大的根生物量,但根茎生物量则要显著的小于沙漠种群;③在植株各部分生物量比重随植株大小的变化趋势上,河边种群各部分的比重随植株大小变化的趋势平缓,而沙漠种群各部分的比重变化趋势则较为急剧,表明河边准噶尔无叶豆分株种群随着植株的大小变化,资源分配比例并没有发生很明显的变化,而沙漠种群变化较大.结果表明,准噶尔无叶豆种群对所处生境水分条件存在可塑性响应,并通过分株种群特征变化和生物量分配差异应对水分条件的变化,形成自身的适应对策.
英文摘要	Eremosparton songoricum is a dwarf shrub found in mobile or semi-fixed sand dunes of central Asia. The germination of E. songoricum seeds in the natural populations is less than 3%, thus clonal propagation seems to be particularly important. Understanding clonal growth characteristics of E. songoricum is potentially helpful for vegetation restoration and conservation efforts. In this paper, two natural populations in the Gurbantuggut Desert of Xinjiang, China, one located along a riverside (GPS location: 46°31.09′N, 88°33.06′E, sand dune slope 15°) and another located in the desert hinterland (GPS location: 46°28.07′N, 088°33.07′E, sand dune slope 30°), were investigated in late June of 2007. Height and density of ramets were investigated within three 4m 4m sites in the two populations. Biomass of above and underground (0-60cm) of ramets was measured and the proportions of biomass in each plant part (foliage, flower, adventitious roots (rhizomes) and vertical roots) were calculated in one of three sites. The results were as follows:①Ramet density and adventitious root density were significantly higher, but ramet height and distance between individuals were significantly lower in the desert population than those in the riverside population.②The biomass of adventitious roots (rhizomes) was significantly lower and the biomass of vertical roots was significantly higher in the desert population compared to the riverside population.③The change in proportion of biomass in each plant part with increasing plant biomass were more dramatic in the desert population than in the riverside population, suggesting different resource allocation strategies with increasing plant biomass for the two populations. These findings indicate that the clonal growth of ramet populations of E. songoricum have greater morphological plasticity under different water conditions, which are attributed to survival in the arid and stressful sand dune environment.
中文关键词	表型可塑性 ; 分株种群特征 ; 生物量分配 ; 水分 ; 准噶尔无叶豆
英文关键词	phenotypic plasticity ramet population characteristics biomass allocation water Eremosparton songoricum
语种	中文
国家	中国
收录类别	CSCD
WOS类目	PLANT SCIENCES
WOS研究方向	Plant Sciences
CSCD记录号	CSCD:3770415
来源机构	中国科学院新疆生态与地理研究所
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/224086
作者单位	中国科学院新疆生态与地理研究所, 中国科学院生物地理与生物资源重点实验室, 乌鲁木齐, 新疆 830011, 中国
推荐引用方式 GB/T 7714	王建成,施翔,张道远,等. 不同水分下准噶尔无叶豆分株种群特征和生物量分配差异[J]. 中国科学院新疆生态与地理研究所,2009,29(12):6475-6481.
APA	王建成,施翔,张道远,&尹林克.(2009).不同水分下准噶尔无叶豆分株种群特征和生物量分配差异.,29(12),6475-6481.
MLA	王建成,et al."不同水分下准噶尔无叶豆分株种群特征和生物量分配差异".29.12(2009):6475-6481.