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Insecticidal Constructure and Bioactivities of Compounds from ficus sarmentosa ***

Agricultural Sciences in China 2011年第9期10卷 1402-1409页

作者： WANG Xue-gui WEI Xiao-yi HUANG King-yan SHEN Li-tao TIAN Yong-qing XU Han-hong Key Laboratory of Natural Pesticide and Chemical Biology Ministry of Education/South China Agricultural University Guangzhou 510642 P.R.China Biorational Pesticide Research Laboratory Sichuan Agricultural University Chengdu 611130 PR.China South China Institute of Botany Chinese Academy of Sciences Guangzhou 510650 P.R.China

Insecticidal activities of the petroleum ether-, chloroform-, ethyl acetate-, and water-soluble fractions of the methanolic extract officus sarmentosa var. henryi were assayed against Musca domestica adults. The chloroform- and ethyl acetate- soluble fractions were the most active with 92.6 and 88.9% mortalities （24 h after treatment） respectively. Therefore, the two fractions were combined and four compounds, isolated from the fractions by activity-guided fractionation, were elucidated as 7-hydroxycoumarin, apigenin, eriodictyol, and quercetin by spectroscopic method and displayed excellent insecticidal activities against adults of M. domestica and 4th instar larva of Aedes albopictus. Among those, 7- hydroxycoumarin showed the strongest insecticidal activities with lethal concentrations （LC50） values of 72.13 μg g^-1 sugar and 4.87 μg mL^-1 （48 h after treatment） against the test insects respectively. The cytoxicities of these compounds on BTI-Tn-5B 1-4 cell were also investigated for the insecticidal mechanism and found that quercetin represented superior inhibitory activity with MTT assay and reactive oxygen species （ROS） against BTI-Tn-5B 1-4 cell, but slightly weaker than that of the positive control （azadirachtin） and significantly greater than the negative control （DMSO only）. Meanwhile, eriodictyol demonstrated the strongest effect on the mitochondrial membrane potentials （MMP）. In conclusion, based on their comparative toxicities to commercial insecticides and their cytotoxic effects, some of the compounds from the F. sarmentosa have potential as botanical insecticides.

关键词： ficus sarmentosa var. henryi Musca domestica Aedes albopictus insecticidal activity 7-hydroxycoumarin quercetin

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