Which root traits determine nitrogen uptake by alpine plant species on the Tibetan Plateau?
文献类型：期刊论文
| 作者 | Hong, Jiangtao1 ; Ma, Xingxing2; Yan, Yan1; Zhang, Xiaoke3; Wang, Xiaodan1
|
| 刊名 | PLANT AND SOIL
 |
| 出版日期 | 2018-03-01 |
| 卷号 | 424期号:1-2页码:63-72 |
| 关键词 | Ammonium nitrogen Nitrate nitrogen Glycine Root morphology Nitrogen absorption |
| ISSN号 | 0032-079X |
| DOI | 10.1007/s11104-017-3434-3 |
| 英文摘要 | Nitrogen (N) is one of the most important limiting factors influencing plant growth and reproduction in alpine and tundra ecosystems. However, in situ observations of the effects of root traits on N absorption by alpine plant species are still lacking. We investigated the rates of N uptake and the effect of root characteristics in ten common herbaceous alpine plant species using a N-15 isotope tracer technique and the root systems of plants growing in a semi-arid steppe environment on the Tibetan Plateau. Our objective was to determine the root traits (root biomass, volume, surface area, average diameter, length, specific root length and specific root area) that make the largest contribution to the total uptake of N (N-15-NO3 (-), N-15-NH4 (+) or N-15-glycine) by alpine plant species. Monocotyledonous species had higher absorption rates for N-15-NH4 (+), N-15-NO3 (-), N-15-glycine and total N-15 than dicotyledonous species (P < 0.05). The root biomass, volume, surface area and average diameter were negatively correlated with the absorption capacity for N-15-NH4 (+), N-15-NO3 (-) and total N-15 across the ten alpine plant species. However, the specific root length and the specific root area had significantly positive effects on the uptake of N. In contrast with traditional views on the uptake of N, the N uptake rate was not improved by a larger root volume or root surface area for these alpine plant species in a high-altitude ecosystem. Root morphological traits had greater impacts on N absorption than traits related to the root system size in alpine herbaceous plants. |
| 语种 | 英语 |
| WOS记录号 | WOS:000430192000005 |
| 出版者 | SPRINGER |
| 源URL | [http://ir.imde.ac.cn/handle/131551/20679]  |
| 专题 | 成都山地灾害与环境研究所_山地表生过程与生态调控重点实验室 |
| 通讯作者 | Wang, Xiaodan |
| 作者单位 | 1.Chinese Acad Sci, Inst Mt Hazards & Environm, 9,Block 4,Renminnanlu Rd, Chengdu 610041, Peoples R China 2.Shanxi Normal Univ, Coll Urban & Environm Sci, Linfen 041000, Peoples R China 3.Hohai Univ, Sch Publ Adm, Nanjing 210098, Jiangsu, Peoples R China |
| 推荐引用方式 GB/T 7714 | Hong, Jiangtao,Ma, Xingxing,Yan, Yan,et al. Which root traits determine nitrogen uptake by alpine plant species on the Tibetan Plateau?[J]. PLANT AND SOIL,2018,424(1-2):63-72. |
| APA | Hong, Jiangtao,Ma, Xingxing,Yan, Yan,Zhang, Xiaoke,&Wang, Xiaodan.(2018).Which root traits determine nitrogen uptake by alpine plant species on the Tibetan Plateau?.PLANT AND SOIL,424(1-2),63-72. |
| MLA | Hong, Jiangtao,et al."Which root traits determine nitrogen uptake by alpine plant species on the Tibetan Plateau?".PLANT AND SOIL 424.1-2(2018):63-72. |
入库方式： OAI收割
来源：成都山地灾害与环境研究所
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