Mechanical traits of fine roots as a function of topology and anatomy

doi:10.1093/aob/mcy076

	Mechanical traits of fine roots as a function of topology and anatomy
	Mao, Zhun 1; Wang, Yan 2; McCormack, M. Luke 3,4; Rowe, Nick 1; Deng, Xiaobao 2,5; Yang, Xiaodong 2; Xia, Shangwen 2; Nespoulous, Jerome 1; Sidle, Roy C.6; Guo, Dali 3
刊名	ANNALS OF BOTANY
	2018-12-04
卷号	122 期号:7 页码:1103-1116
关键词	Biomechanics tensile strength modulus of elasticity tensile strain root diameter fine roots root topology root anatomy
ISSN号	0305-7364
DOI	10.1093/aob/mcy076
通讯作者	Mao, Zhun(maozhun04@126.com)
英文摘要	Background and Aims Root mechanical traits, including tensile strength (T-r), tensile strain (epsilon(r)) and modulus of elasticity (E-r), are key functional traits that help characterize plant anchorage and the physical contribution of vegetation to landslides and erosion. The variability in these traits is high among tree fine roots and is poorly understood. Here, we explore the variation in root mechanical traits as well as their underlying links with morphological (diameter), architectural (topological order) and anatomical (stele and cortex sizes) traits. Methods We investigated the four tropical tree species Pometia tomentosa, Barringtonia fusicarpa, Baccaurea ramiflora and Pittosporopsis kerrii in Xishuangbanna, Yunnan, China. For each species, we excavated intact, fresh, fine roots and measured mechanical and anatomical traits for each branching order. Key Results Mechanical traits varied enormously among the four species within a narrow range of diameters (<2 mm): <0.1-65 MPa for T-r, 4-1135 MPa for E-r and 0.4-37 % for epsilon(r). Across species, T-r and E-r were strongly correlated with stele area ratio, which was also better correlated with topological order than with root diameter, especially at interspecific levels. Conclusions Root topological order plays an important role in explaining variability in fine-root mechanical traits due to its reflection of root tissue development. Accounting for topological order when measuring fine-root traits therefore leads to greater empirical understanding of plant functions (e.g. anchorage) within and across species.
资助项目	French-Chinese Xuguangqi program[34442WB] ; BMU (Germany) International Climate Initiative funded project Ecosystems Protecting Infrastructure and Communities (EPIC)
WOS关键词	TENSILE-STRENGTH ; TREE ROOTS ; BRANCH ORDER ; BIOMECHANICS ; CARBON ; XYLEM ; REINFORCEMENT ; AREA ; ARCHITECTURE ; STABILITY
WOS研究方向	Plant Sciences
语种	英语
出版者	OXFORD UNIV PRESS
WOS记录号	WOS:000457575500005
资助机构	French-Chinese Xuguangqi program ; BMU (Germany) International Climate Initiative funded project Ecosystems Protecting Infrastructure and Communities (EPIC)
内容类型	期刊论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/49925]
专题	中国科学院地理科学与资源研究所
通讯作者	Mao, Zhun
作者单位	1.Univ Montpellier, CNRS, INRA, CIRAD,IRD,AMAP, Montpellier, France 2.Chinese Acad Sci, Xishuangbanna Trop Bot Garden, Key Lab Trop Forest Ecol, Mengla 666303, Yunnan, Peoples R China 3.Chinese Acad Sci, IGSNRR, Key Lab Ecosyst Network Observat & Modeling, Ctr Forest Ecosyst Studies & Qianyanzhou Stn, Beijing 100101, Peoples R China 4.Univ Minnesota, Dept Plant & Microbial Biol, St Paul, MN 55108 USA 5.Chinese Ecosyst Res Net, Xishuangbanna Stn Trop Rain Forest Ecosyst Studie, Mengla 666303, Yunnan, Peoples R China 6.Univ Sunshine Coast, Sustainabil Res Ctr, Maroochydore, Qld, Australia
推荐引用方式 GB/T 7714	Mao, Zhun,Wang, Yan,McCormack, M. Luke,et al. Mechanical traits of fine roots as a function of topology and anatomy[J]. ANNALS OF BOTANY,2018,122(7):1103-1116.
APA	Mao, Zhun.,Wang, Yan.,McCormack, M. Luke.,Rowe, Nick.,Deng, Xiaobao.,...&Stokes, Alexia.(2018).Mechanical traits of fine roots as a function of topology and anatomy.ANNALS OF BOTANY,122(7),1103-1116.
MLA	Mao, Zhun,et al."Mechanical traits of fine roots as a function of topology and anatomy".ANNALS OF BOTANY 122.7(2018):1103-1116.