Effects of elevated ozone and nitrogen addition on leaf nitrogen metabolism in poplar
文献类型：期刊论文
| 作者 | Shang, Bo; Feng, Zhaozhong; Peng, Jinlong; Xu, Yansen ; Paoletti, Elena
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| 刊名 | JOURNAL OF PLANT ECOLOGY
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| 出版日期 | 2021-06 |
| 卷号 | 14期号:3页码:555-568 |
| 关键词 | enzyme activity nitrogen addition nitrogen metabolism ozone poplar |
| ISSN号 | 1752-9921 |
| 英文摘要 | Aims Ozone (O-3) pollution and nitrogen (N) deposition/fertilization often simultaneously affect plant growth. However, research of their interactive effects on leaf N metabolism is still scarce. We investigated their interactive effects, aiming to better understand plant N metabolism processes and biogeochemical cycles under high O-3 pollution and N deposition/fertilization. Methods Poplar saplings were exposed to two O-3 levels (NF, non-filtered ambient air; NF60, NF + 60 ppb O-3) and four N treatments (N0, no N added; N50, N0 + 50 kg N ha(-1) yr(-1); N100, N0 + 100 kg N ha(-1) yr(-1); N200, N0 + 200 kg N ha(-1) yr(-1)) in open-top chambers for 95 days. The indicators related to leaf N metabolism were analyzed, including the activities of N-metabolizing enzymes and the contents of total N, NO3N, NH4+-N, total amino acid (TAA) and total soluble protein (TSP) in the leaves. Important Findings NF60 stimulated the activities of nitrate reductase (NR) by 47.2% at August relative to NF, and stimulated glutamine synthetase (GS) by 57.3% when averaged across all N treatments and sampling times. In contrast, O-3 did not significantly affect TSP and even reduced TAA content in August. Relative to N0, N200 significantly increased light-saturated rate of CO2 assimilation (A sat) by 24%, and increased total N content by 70.3% and 43.3% in August and September, respectively, while it reduced photosynthetic N-use efficiency by 26.1% in August. These results suggest that the increase in A sat and total N content are uncoupled, and that the surplus N is not used to optimize the capacity for carbon assimilation under high N treatment. Simultaneously, high N treatment significantly promoted leaf N metabolism by increasing NO3N contents, NH4+-N contents, TAA contents and the activities of NR and GS. There was no significant interaction between O-3 and N for all variables. |
| WOS研究方向 | Plant Sciences ; Ecology ; Forestry |
| 源URL | [http://ir.rcees.ac.cn/handle/311016/45460]  |
| 专题 | 生态环境研究中心_城市与区域生态国家重点实验室 |
| 作者单位 | 1.Nanjing Univ Informat Sci & Technol, Sch Appl Meteorol, Key Lab Agrometeorol Jiangsu Prov, Nanjing 210044, Peoples R China 2.Chinese Acad Sci, Res Ctr Ecoenvironm Sci, State Key Lab Urban & Reg Ecol, Beijing 100085, Peoples R China 3.CNR, Inst Res Terr Ecosyst, Via Madonna del Piano 10, I-50019 Sesto Fiorentino, Italy |
| 推荐引用方式 GB/T 7714 | Shang, Bo,Feng, Zhaozhong,Peng, Jinlong,et al. Effects of elevated ozone and nitrogen addition on leaf nitrogen metabolism in poplar[J]. JOURNAL OF PLANT ECOLOGY,2021,14(3):555-568. |
| APA | Shang, Bo,Feng, Zhaozhong,Peng, Jinlong,Xu, Yansen,&Paoletti, Elena.(2021).Effects of elevated ozone and nitrogen addition on leaf nitrogen metabolism in poplar.JOURNAL OF PLANT ECOLOGY,14(3),555-568. |
| MLA | Shang, Bo,et al."Effects of elevated ozone and nitrogen addition on leaf nitrogen metabolism in poplar".JOURNAL OF PLANT ECOLOGY 14.3(2021):555-568. |
入库方式： OAI收割
来源：生态环境研究中心
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