摘要
研究了芦苇产生的化感物质2-甲基乙酰乙酸乙酯(EMA)对铜绿微囊藻呼吸作用、光合作用和抗氧化酶体系的影响.结果表明,在实验条件下,EMA能提高铜绿微囊藻的呼吸速率,使培养瓶中的CO2浓度升高;降低铜绿微囊藻的光合作用速率,促进了铜绿微囊藻叶绿素a的降解,使其含量降低;较低浓度的EMA提高了铜绿微囊藻的过氧化物酶、超氧化物歧化酶和脱氢酶的活性,而更高浓度的EMA则显著降低了这些酶活性(α=0.05).高浓度EMA抑制铜绿微囊藻的抗氧化酶体系并促进藻类叶绿素的降解可能是其抑藻机理之一.
The influence of reed produced allelopathy material eathyl-2-methyl acetoacetate （EMA） on respiration action, photosynthesis action and antioxidant enzymes system of Microcystis aeroginosa were studied, Under the test condition EMA could raise the respiration rate of Microcystis aeruginosa, causing the CO2 concentration raising in its culture flask, lowering the photosynthesis action rate of Microcystis aeruginosa. EMA promoted the degradation of Chlorophyll a of Microcystis aeruginosa, causing its content lowering. EMA of lower concentration raised the activities of superoxide dismutase, peroxidase and catalase. Whereas EMA of higher concentration lowered markedly these enzyme activities （α= 0.05）. High concentration EMA restrained antioxidant enzymes system of Microcystis aeruginosa and promoted the degradating of algae chlorophyll might be one of its mechanisms of restraining algae.
出处
《中国环境科学》
EI
CAS
CSCD
北大核心
2007年第3期377-381,共5页
China Environmental Science
基金
国家重点科技攻关计划项目(2003BA809B04-02)
国家自然科学基金-JST重大国际合作项目(20510076)
