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学科主题: Plant Sciences; Marine & Freshwater Biology
题名: Light-dependent phosphate uptake of a submersed macrophyte Myriophyllum spicatum L.
作者: Zhang, Meng ; Cao, Te ; Ni, Leyi ; Xie, Ping ; Zhu, Guorong ; Zhong, Aiwen ; Xu, Jun ; Fu, Hui
通讯作者: Cao, T, Chinese Acad Sci, Inst Hydrobiol, Donghu Expt Stn Lake Ecosyst, State Key Lab Freshwater Ecol & Biotechnol, 7th Donghu S Rd, Wuhan 430072, Hubei, Peoples R China ; caote@ihb.ac.cn ; nily@ihb.ac.cn
关键词: Submersed macrophyte ; Myriophyllum spicatum ; Phosphate absorption ; Phosphate adsorption
刊名: AQUATIC BOTANY
发表日期: 2011
卷: 94, 期:4, 页:151-157
收录类别: SCI
部门归属: [Zhang, Meng; Cao, Te; Ni, Leyi; Xie, Ping; Zhu, Guorong; Zhong, Aiwen; Xu, Jun; Fu, Hui] Chinese Acad Sci, Inst Hydrobiol, Donghu Expt Stn Lake Ecosyst, State Key Lab Freshwater Ecol & Biotechnol, Wuhan 430072, Hubei, Peoples R China; [Zhang, Meng] Jiangxi Acad Environm Sci, Nanchang 330029, Peoples R China
资助者: National High Technology Research and Development Program of China [2008ZX07106-2, 2008ZX07101-013, 2008ZX07526-008]
摘要: The uptake kinetics of phosphate (Pi) by Myriophyllum spicatum was determined from adsorption and absorption under light and dark conditions. Pi uptake was light dependent and showed saturation following the Michaelis-Menten relation (in light: V = 16.91 x [Pi](1.335 + [Pi]), R-2 = 0.90, p < 0.001; in the dark: V = 5.13 x [Pi](0.351 + [Pi]). R-2 = 0.77, p < 0.001). Around 77% of the loss of Pi in the water column was absorbed into the tissue of M. spicatum, and only 23% was adsorbed on the surface of the plant shoots. Our study shows that M. spicatum shoots have a much higher affinity (in light: 3.9 mu mol g(-1) dw h(-1) mu M-1; in the dark: 3.7 mu mol g(-1) dw h(-1) mu M-1) and V-max (maximum uptake rate, shoot light) for Pi uptake than many other aquatic macrophytes (in light: 0.002-0.23 mu mol g(-1) dw h(-1) mu M-1; in the dark: 0.002-0.19 mu mol g(-1) dw h(-1) mu M-1), which may provide a competitive advantage over other macrophytes across a wide range of Pi concentrations. (C) 2011 Elsevier B.V. All rights reserved.
语种: 英语
WOS记录号: WOS:000290502100001
ISSN号: 0304-3770
Citation statistics:
内容类型: 期刊论文
URI标识: http://ir.ihb.ac.cn/handle/342005/15582
Appears in Collections:淡水生态学研究中心_期刊论文

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Recommended Citation:
Zhang, Meng; Cao, Te; Ni, Leyi; Xie, Ping; Zhu, Guorong; Zhong, Aiwen; Xu, Jun; Fu, Hui.Light-dependent phosphate uptake of a submersed macrophyte Myriophyllum spicatum L.,AQUATIC BOTANY,2011,94(4):151-157
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