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The role of NH4+ toxicity in the decline of the submersed macrophyte Vallisneria natans in lakes of the Yangtze River basin, China
Cao, Te; Xie, Ping; Ni, Leyi; Wu, Aiping; Zhang, Min; Wu, Shikai; Smolders, A. J. P.; Ni, LY, Chinese Acad Sci, Inst Hydrobiol, State Key Lab Freshwater Ecol & Biotechnol, Donghu Expt Stn Lake Ecosyst, Wuhan 430072, Peoples R China
2007
Source PublicationMARINE AND FRESHWATER RESEARCH
ISSN1323-1650
Volume58Issue:6Pages:581-587
AbstractExperimental 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.; 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.
SubtypeArticle
KeywordAmmonium Toxicity Faa/sc Ratio Propagation
DepartmentChinese Acad Sci, Inst Hydrobiol, State Key Lab Freshwater Ecol & Biotechnol, Donghu Expt Stn Lake Ecosyst, Wuhan 430072, Peoples R China; Huazhong Agr Univ, Coll Fisheries, Wuhan 430070, Peoples R China; Radboud Univ Nijmegen, Inst Water & Wetland Res, Dept Environm Biol, NL-6525 ED Nijmegen, Netherlands
Subject AreaFisheries ; Limnology ; Marine & Freshwater Biology ; Oceanography
DOI10.1071/MF06090
WOS HeadingsScience & Technology ; Life Sciences & Biomedicine ; Physical Sciences
Indexed BySCI
Language英语
WOS Research AreaFisheries ; Marine & Freshwater Biology ; Oceanography
WOS SubjectFisheries ; Limnology ; Marine & Freshwater Biology ; Oceanography
WOS IDWOS:000247612900008
WOS KeywordPLANT COMMUNITY STRUCTURE ; FREE AMINO-ACIDS ; AMMONIUM TOXICITY ; SOFT WATERS ; NITROGEN ; GROWTH ; ACIDIFICATION ; ACCUMULATION ; PHOSPHORUS ; METABOLISM
Citation statistics
Cited Times:80[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ihb.ac.cn/handle/152342/8528
Collection期刊论文
Corresponding AuthorNi, LY, Chinese Acad Sci, Inst Hydrobiol, State Key Lab Freshwater Ecol & Biotechnol, Donghu Expt Stn Lake Ecosyst, Wuhan 430072, Peoples R China
Affiliation1.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
Recommended Citation
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.,...&Ni, LY, Chinese Acad Sci, Inst Hydrobiol, State Key Lab Freshwater Ecol & Biotechnol, Donghu Expt Stn Lake Ecosyst, Wuhan 430072, Peoples R China.(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.
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