Study on Inhibitory Effect of Chemical Sensation Material Combinations on Microcystis aeruginosa
XING Chunyu
LI Shidong
QIAO Xu
Abstract：Four allelopathic substances,ellagic acid(EA),gallic acid(GA),apigenin(Ap),and luteolin(Lut)were selected for allelopathic inhibition experiments to investigate their inhibitory effects on Microcystis aeruginosa under both single and combined applications.The inhibitory effects of these four allelopathic substances and their combinations on Microcystis aeruginosa were evaluated by measuring the algal density,chlorophyll-a content,activity of cell superoxide dismutase(SOD),and malondialdehyde(MDA)contents.The results indicated that all four allelopathic substances exhibited inhibitory effects on Microcystis aeruginosa,regardless of whether they were used alone or in combination.Specifically,the IC50 values of EA,GA,Ap,and Lut against Microcystis aeruginosa were 21.65 mg/L,16.62 mg/L,6.10 mg/L,and 4.14 mg/L,respectively.Among the combined treatments,the combination of Combination 4(25 mg/L GA+10 mg/L Lut)showed the most significant inhibitory effect(P＜0.05),with an inhibition rate of 96.13％against Microcystis aeruginosa after 9 days of treatment.chlorophyll-a content,SOD activity,and MDA content were also affected to varying degrees.Further comparative analysis re-vealed antagonistic effects between the allelopathic substances in Combination 1(25 mg/L EA+10 mg/L Ap)and Combination 3(25 mg/L GA+10 mg/L Ap),additive effects in Combination 2(25 mg/L EA+10 mg/L Lut),and synergistic effects in Com-bination 4(25 mg/L GA+10 mg/L Lut).
Keywords：allelopathic substancesellagic acidgallic acidapigeninluteolincombined inhibitionMicrocystis aerugi-nosa
Publication Date：2024-12-30
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：8( 139-146 )