Linking root morphology, longevity and function to root branch order: a case study in three shrubs

CORC > 新疆生态与地理研究所 > 中国科学院新疆生态与地理研究所 > 中国科学院新疆生态与地理研究所(2010年以前数据)

	Linking root morphology, longevity and function to root branch order: a case study in three shrubs
	Huang ; Gang ; Zhao ; Xue-yong ; Ha-lin ; Ying-xin ; Zuo ; Xiao-an
刊名	PLANT AND SOIL
	2010
卷号	336 期号:40545 页码:197-208
关键词	LONGLEAF PINE FOREST LIFE-SPAN MORPHOMETRIC-ANALYSIS FINE ROOTS CARBON DYNAMICS NITROGEN ECOSYSTEMS MORTALITY TURNOVER
ISSN号	0032-079X
通讯作者	Huang, G, Chinese Acad Sci, Xinjiang Inst Ecol & Geog, Fukang Stn Desert Ecol, Key Lab Oasis Ecol & Desert Environm, Urumqi 830011, Peoples R China
中文摘要	Root branching order supports a powerful approach to understanding complex root systems; however, how the pattern of root morphological characteristics, tissue carbon (C) and nitrogen (N) concentrations, and root lifespan are related to anatomical features of variable root orders for mature shrubs (similar to 19 years old) in sandy habitats is still unclear. In this study, these relationships were investigated for three typical shrubs in Horqin Sand Land, Northeast China. Root diameter, individual root length, tissue carbon concentration, C:N ratio, root lifespan, root cross-sectional area (CSA), stele CSA, proportion of stele in root CSA, mean xylem vessel CSA and the number of xylem vessels all increased with root order for the three shrubs, while specific root length and nitrogen concentration decreased with root order. The combined root biomass of the first two orders accounted for more than 63% of the first-fourth order root biomass for all the three shrubs. Proportion of stele to root CSA and number of xylem vessels of third-order root segments were significantly higher than that of the first two orders, and third-order roots showed secondary development with a continuous cork layer. All first-order and most second-order roots exhibited primary development, had an intact cortex, a lower proportion of stele to root CSA, and a smaller number of vessels. Our research suggests that the first two order roots of shrubs in sandy habitats are responsible mainly for absorption, and that they play a major role in root turnover and C and N flux in the soil organic matter pool due to their high proportion of biomass and N concentration, as well as their short lifespan.
学科主题	植物生理学
收录类别	SCI
公开日期	2011-08-19
内容类型	期刊论文
源URL	[http://ir.xjlas.org/handle/365004/9884]
专题	新疆生态与地理研究所_中国科学院新疆生态与地理研究所(2010年以前数据)
推荐引用方式 GB/T 7714	Huang,Gang,Zhao,et al. Linking root morphology, longevity and function to root branch order: a case study in three shrubs[J]. PLANT AND SOIL,2010,336(40545):197-208.
APA	Huang.,Gang.,Zhao.,Xue-yong.,Ha-lin.,...&Xiao-an.(2010).Linking root morphology, longevity and function to root branch order: a case study in three shrubs.PLANT AND SOIL,336(40545),197-208.
MLA	Huang,et al."Linking root morphology, longevity and function to root branch order: a case study in three shrubs".PLANT AND SOIL 336.40545(2010):197-208.