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题名: Growth and membrane permeability of two submersed macrophytes in response to ammonium enrichment
作者: Zhong, Aiwen1; Cao, Te1; Ni, Leyi1; Xie, Ping1
通讯作者: Cao, T (reprint author), Chinese Acad Sci, Donghu Expt Stn Lake Ecosyst, State Key Lab Freshwater Ecol & Biotechnol, Inst Hydrobiol, 7 Donghu South Rd, Wuhan 430072, Peoples R China.
关键词: NH4+ stress ; Membrane permeability ; Cations ; Submersed macrophyte
刊名: AQUATIC BIOLOGY
发表日期: 2013
DOI: 10.3354/ab00514
卷: 19, 期:1, 页:55-64
收录类别: SCI
文章类型: Article
部门归属: [Zhong, Aiwen; Cao, Te; Ni, Leyi; Xie, Ping] Chinese Acad Sci, Donghu Expt Stn Lake Ecosyst, State Key Lab Freshwater Ecol & Biotechnol, Inst Hydrobiol, Wuhan 430072, Peoples R China
WOS标题词: Science & Technology ; Life Sciences & Biomedicine
资助者: National Science Foundation of China [31270508, 41230853]; National High Technology Research and Development Program of China [2012ZX07105-004]
类目[WOS]: Marine & Freshwater Biology
研究领域[WOS]: Marine & Freshwater Biology
摘要: Increased ammonium (NH4+) concentrations are reported to be an important cause of decline in submersed macrophytes in eutrophic lakes. In this study, a subacute experiment was conducted to examine the effects of various NH4+ concentrations on growth and membrane permeability of 2 submersed macrophytes, Myriophyllum spicatum and Ceratophyllum demersum. Apical shoots of the plants were incubated in modified Hoagland solution with 0.25, 0.5, 1, 2, 4, 8, 16, 32, 64 and 128 mg l(-1) NH4+-N for 4 d. The plants were then collected for examination of cell membrane permeability and the solutions were used to determine the concentrations of NH4+, sodium (Na+), potassium (K+), magnesium (Mg2+) and calcium (Ca2+). The results indicate that high NH4+ concentrations had significant adverse effects (e.g. reduced growth and leaf chlorosis) on the macrophytes and increased membrane permeability, leading to net leakage of NH4+ and the cations. Compared to M. spicatum, C. demersum had higher membrane permeability, which might enhance NH4+ transportation across the membrane and thus increase its tolerance to NH4+ stress. Significant increases in the membrane permeability of M. spicatum and C. demersum were observed in the treatments with external NH4+-N concentrations of >= 2 mg l(-1), which fall within the range of NH4+ concentrations in many eutrophic lakes.
英文摘要: Increased ammonium (NH4+) concentrations are reported to be an important cause of decline in submersed macrophytes in eutrophic lakes. In this study, a subacute experiment was conducted to examine the effects of various NH4+ concentrations on growth and membrane permeability of 2 submersed macrophytes, Myriophyllum spicatum and Ceratophyllum demersum. Apical shoots of the plants were incubated in modified Hoagland solution with 0.25, 0.5, 1, 2, 4, 8, 16, 32, 64 and 128 mg l(-1) NH4+-N for 4 d. The plants were then collected for examination of cell membrane permeability and the solutions were used to determine the concentrations of NH4+, sodium (Na+), potassium (K+), magnesium (Mg2+) and calcium (Ca2+). The results indicate that high NH4+ concentrations had significant adverse effects (e.g. reduced growth and leaf chlorosis) on the macrophytes and increased membrane permeability, leading to net leakage of NH4+ and the cations. Compared to M. spicatum, C. demersum had higher membrane permeability, which might enhance NH4+ transportation across the membrane and thus increase its tolerance to NH4+ stress. Significant increases in the membrane permeability of M. spicatum and C. demersum were observed in the treatments with external NH4+-N concentrations of >= 2 mg l(-1), which fall within the range of NH4+ concentrations in many eutrophic lakes.
关键词[WOS]: AFFINITY POTASSIUM-TRANSPORT ; VALLISNERIA-NATANS ; MYRIOPHYLLUM-SPICATUM ; POTAMOGETON-CRISPUS ; AMBIENT AMMONIUM ; SHALLOW LAKES ; NH4+ TOXICITY ; YANGTZE-RIVER ; HIGHER-PLANTS ; BARLEY ROOTS
语种: 英语
WOS记录号: WOS:000324199700006
ISSN号: 1864-7790
Citation statistics:
内容类型: 期刊论文
URI标识: http://ir.ihb.ac.cn/handle/342005/19564
Appears in Collections:淡水生态学研究中心_期刊论文

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作者单位: 1.Chinese Acad Sci, Donghu Expt Stn Lake Ecosyst, State Key Lab Freshwater Ecol & Biotechnol, Inst Hydrobiol, Wuhan 430072, Peoples R China
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