缘管浒苔和羽藻氮、磷营养生理学研究

邵魁双; 巩宁; 李珂; 王宗灵; 李大成

缘管浒苔和羽藻氮、磷营养生理学研究

1.
国家海洋环境监测中心,辽宁大连 116023
2.
大连海事大学环境系统生物学研究所,辽宁大连 116023
3.
国家海洋局第一海洋研究所,山东青岛 266061
4.
辽宁省海洋水产科学研究院,辽宁大连 116023

基金项目: 海洋公益性行业科研专项(201105021);国家海洋局青年基金项目(2006114);国家"863"计划项目(2007AA09Z126);我国近海海洋综合调查与评价专项(908-02-04-07)。

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出版历程
- 收稿日期: 2009-06-19

Nitrogen and phosphorus nutrition physiology of Enteromorpha linza and Bryopsis plumosa

1.
National Marine Environmental Monitoring Center, Dalian 116023, China
2.
Institute of Environmental System Biology. Dalian Marinetime University, Dalian 116023, China
3.
First Institute of Oceanography, State Oceanic Administration, Qingdao 266061, China
4.
Liaoning Ocean and Fisheries Science Research Institute, Dalian 116023,China

摘要

摘要: 以无性繁殖系为材料,开展了缘管浒苔和羽藻对NO₃^-,NH₄⁺和PO₄^3-的吸收动力学、生长动力学研究。吸收动力学研究结果表明缘管浒苔和羽藻对NO₃^- 和PO₄^3-的吸收方式为主动运输,对NH₄⁺的吸收方式为被动扩散。缘管浒苔对NO₃^-的最大吸收速率(V_max)、对NH₄⁺的吸收斜率都大于羽藻,说明缘管浒苔对高浓度的NO₃^-和NH₄⁺具有更强的吸收能力。缘管浒苔吸收NO₃^-和NH₄⁺的a值远大于羽藻,说明在低营养盐浓度时,缘管浒苔对NO₃^-和NH₄⁺的亲和力更强。在PO₄^3-的吸收中,羽藻的最大吸收速率(V_max)远大于缘管浒苔,说明羽藻对高浓度PO₄^3-的吸收能力更强,但缘管浒苔的a值远大于羽藻,说明前者在低营养盐浓度时PO₄^3-的亲和力更强。生长动力学研究结果表明,硝酸氮是促进两种海藻快速生长的最适宜氮源形式,氨氮更易促进藻体叶绿素的积累。在相同氮营养条件下,羽藻表现出比缘管浒苔更强的生长优势。
- 缘管浒苔 /
- 羽藻 /
- NO₃^- /
- NH₄⁺ /
- PO₄^3- /
- 吸收动力学 /
- 生长动力学
Abstract: The studies on the uptake and growth kinetics of NO^-₃,NH⁺₄和PO^3-₄N in the clone of Enteromorpha linza and Bryopsis plumosa were conducted. The results suggested that NO^-₃ and PO^3-₄ were taken up in the form of active uptake by the two alga, with NH⁺₄ taken up by passive diffusion. The parameters of V_max and straight slope for E linza were higher than that for B. plumose, which suggested that E. linza could be more favor to high N than B. plumosa. Moreover, the value of a (V_max/K_s) for NO^-₃and NH⁺₄ in E. linza was obviously higher than that in B. plumosa, which showed that E. linza could have more approachability to low N than B. plumosa. As for the uptaken of PO^3-₄, E. linza may have higher P uptake capacities at high P and lower approachability to low P than B. plumosa due to the higher V_max and lower a than B. plumosa. NO^-₃ is the most favorite N form to meet the growth for both species, while NH⁺₄ is more object to increase the accumulation of chlorophyll than NO^-₃. In addition, B. plumosa exhibited higher growth rate than E. linza under same N condition.
- Enteromorpha linza /
- Bryopsis plumose /
- NO₃^- /
- NH₄⁺ /
- PO₄^3- /
- uptake kinetics /
- growth kinetics

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参考文献(31)

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