The role of NH4+ toxicity in the decline of the submersed macrophyte Vallisneria natans in lakes of the Yangtze River basin, China
文献类型：期刊论文
| 作者 | Cao, Te; Xie, Ping; Ni, Leyi; Wu, Aiping; Zhang, Min; Wu, Shikai; Smolders, A. J. P. |
| 刊名 | MARINE AND FRESHWATER RESEARCH
 |
| 出版日期 | 2007 |
| 卷号 | 58期号:6页码:581-587 |
| ISSN号 | 1323-1650 |
| 关键词 | ammonium toxicity FAA/SC ratio propagation |
| 通讯作者 | Ni, LY, Chinese Acad Sci, Inst Hydrobiol, State Key Lab Freshwater Ecol & Biotechnol, Donghu Expt Stn Lake Ecosyst, Wuhan 430072, Peoples R China |
| 中文摘要 | Experimental and field studies were conducted to evaluate the effects of NH4+ enrichment on growth and distribution of the submersed macrophyte, Vallisneria natans L, in lakes of the Yangtze River in China, based on the balance between free amino acids (FAA) and soluble carbohydrates (SC) in the plant tissue. Increase of NH4+ rather than NO3- concentrations in the water column caused FAA accumulation and SC depletion of the plant. The plant showed a unimodal pattern of biomass distribution along both FAA/SC ratios and external NH4+ concentrations, indicating that a moderate NH4-N concentration (< 0.3 mg L-1) benefited the plant, whereas the high NH4-N concentration (> 0.56 mg L-1) eliminated the plant completely. Therefore, 0.56 mg NH4-N mg L-1 in the water column was taken as the upper limit for V. natans in lakes of the Yangtze River basin. The mesocosm experiment showed that at a high external NH4-N (0.81 mg L-1), V. natans failed to propagate with a loss of half SC content (5 mg g(-1) DW) in the rhizomes, indicating that the consumption of carbohydrates for detoxification of excess NH4+ into non-toxic FAA significantly diminished carbohydrate supply to the rhizomes. This might consequently inhibit the vegetative reproduction of the plant, and also might be an important cause for the decline and disappearance of the plant with eutrophication. The present study for the first time reports substantial ecophysiological evidences for NH4+ stress to submersed macrophytes, and indicates that NH4+ toxicity arising from eutrophication probably plays a key role in the deterioration of submersed macrophytes like V. natans. |
| 英文摘要 | Experimental and field studies were conducted to evaluate the effects of NH4+ enrichment on growth and distribution of the submersed macrophyte, Vallisneria natans L, in lakes of the Yangtze River in China, based on the balance between free amino acids (FAA) and soluble carbohydrates (SC) in the plant tissue. Increase of NH4+ rather than NO3- concentrations in the water column caused FAA accumulation and SC depletion of the plant. The plant showed a unimodal pattern of biomass distribution along both FAA/SC ratios and external NH4+ concentrations, indicating that a moderate NH4-N concentration (< 0.3 mg L-1) benefited the plant, whereas the high NH4-N concentration (> 0.56 mg L-1) eliminated the plant completely. Therefore, 0.56 mg NH4-N mg L-1 in the water column was taken as the upper limit for V. natans in lakes of the Yangtze River basin. The mesocosm experiment showed that at a high external NH4-N (0.81 mg L-1), V. natans failed to propagate with a loss of half SC content (5 mg g(-1) DW) in the rhizomes, indicating that the consumption of carbohydrates for detoxification of excess NH4+ into non-toxic FAA significantly diminished carbohydrate supply to the rhizomes. This might consequently inhibit the vegetative reproduction of the plant, and also might be an important cause for the decline and disappearance of the plant with eutrophication. The present study for the first time reports substantial ecophysiological evidences for NH4+ stress to submersed macrophytes, and indicates that NH4+ toxicity arising from eutrophication probably plays a key role in the deterioration of submersed macrophytes like V. natans. |
| 学科主题 | Fisheries; Limnology; Marine & Freshwater Biology; Oceanography |
| WOS标题词 | Science & Technology ; Life Sciences & Biomedicine ; Physical Sciences |
| 类目[WOS] | Fisheries ; Limnology ; Marine & Freshwater Biology ; Oceanography |
| 研究领域[WOS] | Fisheries ; Marine & Freshwater Biology ; Oceanography |
| 关键词[WOS] | PLANT COMMUNITY STRUCTURE ; FREE AMINO-ACIDS ; AMMONIUM TOXICITY ; SOFT WATERS ; NITROGEN ; GROWTH ; ACIDIFICATION ; ACCUMULATION ; PHOSPHORUS ; METABOLISM |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000247612900008 |
| 公开日期 | 2010-10-13 |
| 源URL | [http://ir.ihb.ac.cn/handle/152342/8528]  |
| 专题 | 水生生物研究所_中科院水生所知识产出（2009年前）_期刊论文 |
| 作者单位 | 1.Chinese Acad Sci, Inst Hydrobiol, State Key Lab Freshwater Ecol & Biotechnol, Donghu Expt Stn Lake Ecosyst, Wuhan 430072, Peoples R China 2.Huazhong Agr Univ, Coll Fisheries, Wuhan 430070, Peoples R China 3.Radboud Univ Nijmegen, Inst Water & Wetland Res, Dept Environm Biol, NL-6525 ED Nijmegen, Netherlands |
| 推荐引用方式 GB/T 7714 | Cao, Te,Xie, Ping,Ni, Leyi,et al. The role of NH4+ toxicity in the decline of the submersed macrophyte Vallisneria natans in lakes of the Yangtze River basin, China[J]. MARINE AND FRESHWATER RESEARCH,2007,58(6):581-587. |
| APA | Cao, Te.,Xie, Ping.,Ni, Leyi.,Wu, Aiping.,Zhang, Min.,...&Smolders, A. J. P..(2007).The role of NH4+ toxicity in the decline of the submersed macrophyte Vallisneria natans in lakes of the Yangtze River basin, China.MARINE AND FRESHWATER RESEARCH,58(6),581-587. |
| MLA | Cao, Te,et al."The role of NH4+ toxicity in the decline of the submersed macrophyte Vallisneria natans in lakes of the Yangtze River basin, China".MARINE AND FRESHWATER RESEARCH 58.6(2007):581-587. |
入库方式： OAI收割
来源：水生生物研究所
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