干旱区生态环境知识资源中心(Arid): 温带草地主要优势植物不同器官间功能性状的关联

Arid

	温带草地主要优势植物不同器官间功能性状的关联
其他题名	Linkages of functional traits among plant organs in the dominant species of the Inner Mongolia grassland, China
	周鹏 1; 耿燕 1; 马文红 2; 贺金生 1
来源期刊	植物生态学报
ISSN	1005-264X
出版年	2010
卷号	34 期号:1 页码:7-16
中文摘要	理解植物各器官间功能性状的关联,有助于确定控制功能性状的内在机制以及性状间的比例关系.基于内蒙古温带草地19个地点、42种优势草本植物的野外观测,分析了叶片、茎、牛殖器官、细根和粗根问功能性状(N、P含量、N:P、比叶面积、比根长以及叶片和细根的组织密度)的关联.主要结果如下:在种群和物种水平上,各器官的N和P含量都显著正相关,比叶而积与叶片N、P含量和组织密度在种群水平上显著负相关,而在物种水平上没有显著的相关关系;而比根长仪在种群水平上与细根的组织密度显著负相关.N、P含量以及N:P在各器官之间一致呈显著正相关,而比叶面积和比根长没有显著的相关关系.叶片和细根的组织密度在种群水甲上显著负相关,而在物种水平上没有显著的相关关系.非禾草比禾草相应器官(除茎外)的N、P含量高,但二者茎的N、P含量没有显著的差异;豆科植物比非豆科植物相应器官的N含量高,而P含量没有显著的差异.
英文摘要	Aims The temperate grasslands in Inner Mongolia, representing a great diversity in vegetation types (desert steppe, typical steppe and meadow steppe) and function groups (grass/herb, legume/non-legume), are ideal places to test the hypothesized functional trait relationships among plant organs. Our main objective in this study was to test whether plant functional traits vary in a coordinated fashion both within and across organs. Methods Based on the field observation during July and August in both 2006 and 2007, we measured suites of ecophysiological traits of 42 grassland species from 19 sites in Inner Mongolia. The longitude of the study region ranges from 112.82° to 120.12° (E), and the latitude ranges from 41.76° to 49.89° (N). N and P concentrations, N:P ratios of leaves, stems, reproductive structures, fine roots (diameter ＜ 1 mm) and coarse roots (diameter ＞ 1 mm) as well as tissue density of leaf and fine root and specific leaf area/specific root length were determined. Important findings At both population and interspecific level, N and P concentrations were positively correlated within each organ. Specific leaf area was negatively correlated with leaf N and P concentrations and tissue density at the population level but not at the interspecific level. Specific root length was negatively related to fine root tissue density at population level. Plants with low leaf or fine root tissue density had leaves or fine roots with high N concentrations and large specific leaf area or specific root length. N and P concentrations as well as N: P ratios were also consistently correlated across all organs, but no correlation between specific leaf area and specific root length was observed. At the population level there existed a weak negative correlation between leaf and fine root tissue density while at interspecific level this relationship disappeared. Grasses had lower N and P concentrations than herbs in leaves, reproductive structures and roots, but not in stems. Legumes had higher N concentrations than non-legumes in all organs, but they showed no significant differences in P concentrations.
中文关键词	生态计量学 ; 植物器官 ; 比叶面积 ; 比根长 ; 温带草地 ; 组织密度
英文关键词	ecological stoichiometry plant organ specific leaf area specific root length temperate grassland tissue density
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:3806852
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/225890
作者单位	1.北京大学城市与环境学院生态学系, 北京 100871, 中国; 2.北京大学深圳研究生院环境与城市学院, 深圳, 广东 518055, 中国
推荐引用方式 GB/T 7714	周鹏,耿燕,马文红,等. 温带草地主要优势植物不同器官间功能性状的关联[J],2010,34(1):7-16.
APA	周鹏,耿燕,马文红,&贺金生.(2010).温带草地主要优势植物不同器官间功能性状的关联.植物生态学报,34(1),7-16.
MLA	周鹏,et al."温带草地主要优势植物不同器官间功能性状的关联".植物生态学报 34.1(2010):7-16.