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引用本文:周易勇,李建秋,张敏.湿地中碱性磷酸酶的动力学特征与水生植物的关系.湖泊科学,2002,14(2):134-138. DOI:10.18307/2002.0206
ZHOU Yiyong,LI Jianqiu,ZHANG Min.Relationship Between the Kinetics of Alkaline Phosphatase and Aquatic Plants in Wetlands. J. Lake Sci.2002,14(2):134-138. DOI:10.18307/2002.0206
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湿地中碱性磷酸酶的动力学特征与水生植物的关系
周易勇, 李建秋, 张敏
中国科学院水生生物研究所, 武汉430072
摘要:
本文讨论了种植菹草 (Potamogeton crispus L.)、水花生 (Alternanthear philoxeroides Griseb.)、紫背浮萍 (Spirodela polyrhiza(L.)Schleid.)以及对照实验池 (12.5m×9.5m)过滤 (小于0 4 5 μm)与未过滤水样和沉积物中碱性磷酸酶的动力学特征及其分布.水生植被能降低水样和表层沉积物酶的催化效率,抑制作用因植物的种类而异,且在未过滤水中表现得尤为突出.因此,受抑制者多与较大的颗粒相联系,这一结果暗示植物克藻效应的胞外酶学机制.水生植物种植区表层沉积物的低酶活性是其中有机磷不易矿化故得以保持从而改善水质的可能原因,而深层沉积物酶的反应速度则明显高于对照.湿地亚表层沉积物因其具有的理论与实际意义而值得深入研究.
关键词:  湿地  碱性磷酸酶  动力学  分布
DOI:10.18307/2002.0206
分类号:
基金项目:国家自然科学基金(20177033、39670149、39170165);淡水生态与生物技术国家重点实验室基金;中国科学院东湖湖泊生态系统试验站基金;中国科学院长春地理研究所现代湿地过程与环境开放实验室基金;中国科学院"青年科学家小组"基金联合资助项目
Relationship Between the Kinetics of Alkaline Phosphatase and Aquatic Plants in Wetlands
ZHOU Yiyong, LI Jianqiu, ZHANG Min
Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, P.R. China
Abstract:
Kinetics and distributions of alkaline phosphatase in water, natural and filtered (<0.45μm), coupled with sediment, in constructed wetland (12.5m×9.5m)inhabited by Potamogeton crispus L., Alternanthear philoxeroides Griseb.and Spirodela polyrhiza L.respectively, were determined.The plants inactivated the enzyme, in kinetic sense, in surficial sediment and water, depending on species.The inactivation was most obvious in unfiltered water samples implying an enzymatic mechanism explaining the plant-algae interaction.In sediments covered by rooted plants, the enzymatic activity was lower in surficial layers, leading a nutrient retention and water quality amelioration, but significantly higher in the relatively deeper layers.The complexity of subsurface in wetland sediment deserves further study, which is of great theoretical and practical significance.
Key words:  Wetland  alkaline phosphatase  kinetics  distribution
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