【摘要】 采用不同浓度肉桂酸溶液处理铜绿微囊藻(Microcystis aeruginosa)和斜生栅藻(Scenedesmus arcuatus),研究了其对这两种藻的抑制作用及其化感作用机制.结果显示,肉桂酸浓度达到0.6mmol/L时,对铜绿微囊藻有明显的抑制作用(P<0.05),而达到0.9mmol/L时对斜生栅藻有明显抑制作用(P<0.01).抑制作用表现为:藻细胞生长量显著降低;藻体叶绿素a含量急剧下降;超氧化物歧化酶(SOD)活性则呈先升高后下降的趋势;O2-·的含量和膜脂质过氧化产物丙二醛(MDA)呈升高趋势,说明肉桂酸处理后可能是通过O2-·的产生引起膜脂质过氧化增加,造成了藻细胞膜的损伤,继而影响到细胞的功能.本实验提示,肉桂酸的抑藻作用或许有望开发成新的生物杀藻剂.图4表3参22更多还原

【Abstract】 The paper discusses the study on the inhibitory effect and allelopathic mechanism of cinnamic acid on Microcystis aeruginosa and Scenedesmus arcuatus. The results indicated that the growthes of M. aeruginosa and S. arcuatus were obviously inhibited when the concentrations of cinnamic acid are over 0.6 mmol/L and 0.9 mmol/L, respectively. The inhibition features are displayed as: the algal biomass and chlorophyll-a content declined evidently; SOD activity increased firstly but decreased then; O2-· content and MDA content both increased gradually. Therefore, it indicated the inhibitory effects might be due to the cinnamic acids that led to the lipid peroxidation damage of the algal cell membrane. This paper suggestes that cinnamic acid may be developed as an effective algaecide for controlling undesired algale. Fig 4, Tab 3, Ref 22更多还原