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学科主题: Limnology; Marine & Freshwater Biology
题名: Effects of ammonium on growth, nitrogen and carbohydrate metabolism of Potamogeton maackianus A. Benn
作者: Li, Huijuan1, 2; Cao, Te1; Ni, Leyi1
通讯作者: Ni, L, Chinese Acad Sci, Inst Hydrobiol, State Key Lab Freshwater Ecol & Biotechnol, Donghu Expt Stn Lake Ecosyst, Wuhan 430072, Peoples R China
关键词: eutrophication ; ammonium ; total nitrogen (TN) ; free amino acid (FAA) ; protein ; starch ; Potamogeton maackianus
刊名: FUNDAMENTAL AND APPLIED LIMNOLOGY
发表日期: 2007
DOI: 10.1127/1863-9135/2007/0170-0141
卷: 170, 期:2, 页:141-148
收录类别: SCI
文章类型: Article
部门归属: [Li, Huijuan; Cao, Te; Ni, Leyi] Chinese Acad Sci, Inst Hydrobiol, State Key Lab Freshwater Ecol & Biotechnol, Donghu Expt Stn Lake Ecosyst, Wuhan 430072, Peoples R China; [Li, Huijuan] Chinese Acad Sci, Inst Urban Environm, Xiamen 361003, Peoples R China
WOS标题词: Science & Technology ; Life Sciences & Biomedicine
类目[WOS]: Limnology ; Marine & Freshwater Biology
研究领域[WOS]: Marine & Freshwater Biology
摘要: Growth, nitrogen and carbohydrate metabolism in relation to eutrophication were studied for a submerged plant Potamogeton maackianus, a species common in East Asian shallow lakes. The plants were grown in six NH4+-N concentrations (0.05, 0.50, 1.00, 3.50, 5.00 and 10.00 mg/L) for six days. NH4+-N levels in excess of 0.50 mg/L inhibited the plant growth. The relationships between external NH4+-N availability and total nitrogen (TN), protein-N, free amino acid-N (FAA-N) and NH4+-N in plant tissues, respectively, conformed to a logarithmic model suggesting that a feedback inhibition mechanism may exist for ammonium uptake. The response of starch to NH4+-N was fitted with a negative, logarithmic curve. Detailed analysis revealed that the influx NH4+-N had been efficiently incorporated into organic-N and eventually stored as protein at the expense of starch accumulation. These data suggest that this species may be able to tolerate high levels of ammonium when dissolved oxygen is sufficient.
英文摘要: Growth, nitrogen and carbohydrate metabolism in relation to eutrophication were studied for a submerged plant Potamogeton maackianus, a species common in East Asian shallow lakes. The plants were grown in six NH4+-N concentrations (0.05, 0.50, 1.00, 3.50, 5.00 and 10.00 mg/L) for six days. NH4+-N levels in excess of 0.50 mg/L inhibited the plant growth. The relationships between external NH4+-N availability and total nitrogen (TN), protein-N, free amino acid-N (FAA-N) and NH4+-N in plant tissues, respectively, conformed to a logarithmic model suggesting that a feedback inhibition mechanism may exist for ammonium uptake. The response of starch to NH4+-N was fitted with a negative, logarithmic curve. Detailed analysis revealed that the influx NH4+-N had been efficiently incorporated into organic-N and eventually stored as protein at the expense of starch accumulation. These data suggest that this species may be able to tolerate high levels of ammonium when dissolved oxygen is sufficient.
关键词[WOS]: STRATIOTES-ALOIDES L ; WATER-QUALITY ; DECLINE ; LIGHT ; ACCUMULATION ; RESTORATION ; MACROPHYTES ; RESPONSES ; TOXICITY ; PLANTS
语种: 英语
WOS记录号: WOS:000251958100005
ISSN号: 1863-9135
Citation statistics:
内容类型: 期刊论文
URI标识: http://ir.ihb.ac.cn/handle/152342/8316
Appears in Collections:中科院水生所知识产出(2009年前)_期刊论文

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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.Chinese Acad Sci, Inst Urban Environm, Xiamen 361003, Peoples R China

Recommended Citation:
Li, Huijuan; Cao, Te; Ni, Leyi.Effects of ammonium on growth, nitrogen and carbohydrate metabolism of Potamogeton maackianus A. Benn,FUNDAMENTAL AND APPLIED LIMNOLOGY,2007,170(2):141-148
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