Inhibition effect of four plant essential oils on nine aquatic pathogens

CAI Hongjiao; TIAN Houjun; HUANG Hao; ZOU Wenzheng; LIN Mao; FENG Shaoyi; LI Zhongqin

doi:10.13557/j.cnki.issn1002-2813.2025.05.012

Abstract：The experiment aimed to investigate the inhibitory effects of four plant essential oils on nine aquatic pathogenic bacteria.linalool,cis-jasmone,3-carene,and α-cyclocitral were studied,and the Oxford cup method and twofold dilution method were used to determine the antibacterial effects of the four plant essential oils against nine bacterial pathogens.The results showed that at a concentration of 100.00 mL/L,3-carene had the best antibacterial effect on Edwardsiella,V.antiquarius,V.parahaemolyticus and V.alginolyticus,with MIC values of 50,50,25 and 50 mL/L,respectively,and all had inhibition zone diameters>20.00 mm,indicating extreme sensitivity.At a concentration of 100.00 mL/L,α-cyclocitral had inhibition zone diameters>20.00 mm against Vibrio alginolyticus,V.fluvialis,V.parahaemolyticus,Staphylococcus aureus,and V.antiquarius,indicating extreme sensitivity.Linalool had the strongest antibacterial effect on V.parahaemolyticus and V.fluvialis,with MIC values of 3.125 mL/L,and inhibition zone diameters>20 mm,indicating extreme sensitivity.Cis-Jasmone had the best antibacterial effect on V.fluvialis and Escherichia coli,with inhibition zone diameters of 37.30 mm and 30.67 mm,respectively,indicating extreme sensitivity.The study suggests that 3-carene and α-cyclocitral have broad-spectrum antibacterial effects.