干旱区生态环境知识资源中心(Arid): Ecological adaptation of Reaumuria soongorica root system architecture to arid environments

Arid

	Ecological adaptation of Reaumuria soongorica root system architecture to arid environments
	Shan Lishan; Li Yi; Geng Dongmei; Dong Qiulian
来源期刊	Sciences in Cold and Arid Regions
ISSN	1674-3822
出版年	2014
卷号	6 期号:2 页码:150-158
英文摘要	The architectural parameters of Reaumuria soongorica root system in different habitats of Gansu Province, China were analyzed to examine its ecological adaptability to arid environments. Results show that:(1) Topological indices of R. Soongorica root system are small in all habitats, and root branching pattern tends to be dichotomous. Also, the indices gradually increase in the Minqin windblown sand region and the Zhangye Gobi region in Hexi Corridor, which indicates that drought tends to produce her-ringbone-like root branching patterns. (2) Fractal dimension values of R. Soongorica root system are small and not obvious in the Minqin windblown sand region and the Zhangye Gobi region in Hexi Corridor, with values of 1.1778 and 1.1169, respectively. Fractal dimension values are relatively large in Jiuzhoutai semi-arid hilly and gully region of the Loess Plateau, which indicates that the R. Soongorica root system has better fractal characteristics in this region than in the other regions. (3) Total branching ra-tios of the R. Soongorica root system in arid regions of Hexi Corridor are smaller than that in the Jiuzhoutai semi-arid hilly and gully region of the Loess Plateau. This shows that root branching ability in the semiarid region is stronger, and it decreases to some degree with increased drought. (4) The root connection lengths of R. soongorica root system are long in all habitats, but there are significant length differences between the different habitats. The root connection length at the Minqin windblown sand region is the longest. It is concluded that R. soongorica adapts to arid environments by decreasing root branching, decreasing root overlap and increasing root connection length, which makes its root branching pattern tend to be herringbone-like to reduce competition in root internal environment for nutrients and to enhance root absorption rate of nutrients, and ensure effective nutrition space. Thus the roots can absorb enough water and nutrients in resource-poor settings to ensure normal physiological requirements.
英文关键词	topological indices fractal dimension fractal abundance ecological adaptation root architecture
类型	Article
语种	英语
收录类别	CSCD
WOS研究方向	Science & Technology - Other Topics
CSCD记录号	CSCD:5135555
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/335355
作者单位	Shan Lishan, College of Forestry, Gansu Agricultural University, Lanzhou, Gansu 730070, China.; Li Yi, College of Forestry, Gansu Agricultural University, Lanzhou, Gansu 730070, China.; Geng Dongmei, College of Forestry, Gansu Agricultural University, Lanzhou, Gansu 730070, China.; Dong Qiulian, College of Forestry, Gansu Agricultural University, Lanzhou, Gansu 730070, China.
推荐引用方式 GB/T 7714	Shan Lishan,Li Yi,Geng Dongmei,et al. Ecological adaptation of Reaumuria soongorica root system architecture to arid environments[J],2014,6(2):150-158.
APA	Shan Lishan,Li Yi,Geng Dongmei,&Dong Qiulian.(2014).Ecological adaptation of Reaumuria soongorica root system architecture to arid environments.Sciences in Cold and Arid Regions,6(2),150-158.
MLA	Shan Lishan,et al."Ecological adaptation of Reaumuria soongorica root system architecture to arid environments".Sciences in Cold and Arid Regions 6.2(2014):150-158.