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Study on Scavenging Activities to DPPH Free Radical of Extracts from Fresh Leaves of Some Plants of Verbenaceae

WEI Long-bin et al(Guangxi Gadre School of Forestry,Nanning,Guangxi 530004)  
DPPH detection method was used to determine the free radical scavenging activity of the 95 % ethanol extracts from the fresh leaves of some Verbenaceae.The results revealed that all the plants tested had different free radical scavenging capacities.Among them,IC50 of scavenging DPPH free radical of total solute of the 95 % ethanol extracts from the fresh leaves of Duranta repens Linn.var.repens,Clerodendrum serratum(Linn.) Moon and Gmelina arborea Roxb.were 6.343,4.757 and 4.233 respectively,which showed stronger free radical scavenging capacity;while that of Tectona grandis Linn.f.,Duranta repens var.Golden Leaves,Clerodendrum inerme(Linn.) Gaertn.and Premna fulva Graib were greater than 2 or close to 2,showed free radical scavenging capacity;that of Lantana camara Linn.was 1.502,which showed some free radical scavenging capacity;but that of Vitex trifolia Linn.and Holmskioldia anguinea Retz.were less than 1,which showed weaker free radical scavenging capacity.
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