Mechanical traits of fine roots as a function of topology and anatomy
文献类型：期刊论文
| 作者 | Mao, Zhun1; Wang, Yan2; McCormack, M. Luke3,4; Rowe, Nick1; Deng, Xiaobao2,5; Yang, Xiaodong2; Xia, Shangwen2; Nespoulous, Jerome1; Sidle, Roy C.6; Guo, Dali3
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| 刊名 | ANNALS OF BOTANY
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| 出版日期 | 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. |
| WOS关键词 | TENSILE-STRENGTH ; TREE ROOTS ; BRANCH ORDER ; BIOMECHANICS ; CARBON ; XYLEM ; REINFORCEMENT ; AREA ; ARCHITECTURE ; STABILITY |
| 资助项目 | French-Chinese Xuguangqi program[34442WB] ; BMU (Germany) International Climate Initiative funded project Ecosystems Protecting Infrastructure and Communities (EPIC) |
| WOS研究方向 | Plant Sciences |
| 语种 | 英语 |
| WOS记录号 | WOS:000457575500005 |
| 出版者 | OXFORD UNIV PRESS |
| 资助机构 | French-Chinese Xuguangqi program ; BMU (Germany) International Climate Initiative funded project Ecosystems Protecting Infrastructure and Communities (EPIC) |
| 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. |
入库方式： OAI收割
来源：地理科学与资源研究所
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