Root nitrogen acquisition strategy of trees and understory species in a subtropical pine plantation in southern China
文献类型：期刊论文
| 作者 | Liu, Qianyuan1,2; Wang, Huimin1,2,3 ; Xu, Xingliang2
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| 刊名 | EUROPEAN JOURNAL OF FOREST RESEARCH
 |
| 出版日期 | 2020-05-08 |
| 页码 | 14 |
| 关键词 | N uptake rate Mycorrhizal colonization Absorptive root Morphological and architectural traits N-15 isotope labeling |
| ISSN号 | 1612-4669 |
| DOI | 10.1007/s10342-020-01284-6 |
| 通讯作者 | Wang, Huimin(wanghm@igsnrr.ac.cn) |
| 英文摘要 | Nitrogen (N) is considered as a major factor that limits plant growth and metabolism, and absorptive roots play a critical role in plant resource acquisition. However, little is known about the roles of mycorrhizal colonization, and morphological and architectural traits of absorptive roots in N uptake rates. We examined the uptake rates for ammonium (NH4+), nitrate (NO3-) and glycine using a N-15 isotope tracer technique and measured mycorrhizal colonization rates and functional traits (morphology, architecture and chemistry) of absorptive roots in a subtropical plantation during the growing season. Results showed that trees, shrubs and herbs all preferred to take up NH4+ over NO3- and glycine, likely due to the dominant available N form in native soils. Species coexisting in the subtropical plantation did not show chemical niche differentiation, but there was a temporal niche separation in N acquisition across plant species. Absorptive roots with higher mycorrhizal colonization rates exhibited higher N uptake rates than those with lower colonization. In May, morphological traits (diameter and root tissue density) seemed playing important roles in N acquisition on that the absorptive roots with larger diameter and shorter specific root length (SRL) showed higher uptake rates for NH4+, NO3-, and glycine than those with smaller diameter and longer SRL. While in August, the architectural traits of root branching might be essential to enhance nutrient absorption on that the absorptive roots with intensive branching exhibited higher N uptake rates than those with less branching. Our findings suggested that plant species may evolve effective N acquisition strategies integrated mycorrhizal symbiosis, and root morphological and architectural traits over a temporal scale to acclimate to the changing environments. |
| WOS关键词 | ARBUSCULAR MYCORRHIZAL FUNGI ; NUTRIENT FORAGING STRATEGIES ; N-15 NATURAL-ABUNDANCE ; AMINO-ACID-UPTAKE ; INORGANIC NITROGEN ; SEASONAL-VARIATION ; DROUGHT RESPONSE ; NORWAY SPRUCE ; BRANCH ORDER ; FINE ROOTS |
| 资助项目 | National Natural Science Foundation of China[31670635] ; National Natural Science Foundation of China[31730014] |
| WOS研究方向 | Forestry |
| 语种 | 英语 |
| WOS记录号 | WOS:000530965100001 |
| 出版者 | SPRINGER |
| 资助机构 | National Natural Science Foundation of China |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/159766]  |
| 专题 | 中国科学院地理科学与资源研究所 |
| 通讯作者 | Wang, Huimin |
| 作者单位 | 1.Univ Chinese Acad Sci, Coll Resources & Environm, Beijing 100190, Peoples R China 2.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Ecosyst Network Observat & Modeling, Qianyanzhou Ecol Res Stn, Beijing 100101, Peoples R China 3.Jiangxi Key Lab Ecosyst Proc & Informat, Jian 343725, Jiangxi, Peoples R China |
| 推荐引用方式 GB/T 7714 | Liu, Qianyuan,Wang, Huimin,Xu, Xingliang. Root nitrogen acquisition strategy of trees and understory species in a subtropical pine plantation in southern China[J]. EUROPEAN JOURNAL OF FOREST RESEARCH,2020:14. |
| APA | Liu, Qianyuan,Wang, Huimin,&Xu, Xingliang.(2020).Root nitrogen acquisition strategy of trees and understory species in a subtropical pine plantation in southern China.EUROPEAN JOURNAL OF FOREST RESEARCH,14. |
| MLA | Liu, Qianyuan,et al."Root nitrogen acquisition strategy of trees and understory species in a subtropical pine plantation in southern China".EUROPEAN JOURNAL OF FOREST RESEARCH (2020):14. |
入库方式： OAI收割
来源：地理科学与资源研究所
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