Variance in Enzymes Activities of Frankliniella occidentalis(Pergande) Feeding on Tomato Plant Damaged by Tetranychus urticae Koch
WEN Juan
ZHI Junrui
ZENG Guang
Abstract：In order to explore the effect of induced defensive responses of tomato plant damaged by Tetranychus urticae on Frankliniella occidentalis,the influences of tomato plant damaged by T.urticae at different densities(5 mites/leaf,15 mites/leaf) and different time (3 d,5 d,7 d) on enzymes activities of F.occidentalis were detected.The results showed that when F.occidentalis fed on tomato plant damaged by T.urticae,the activities of protective enzymes (POD,CAT and SOD) and defensive enzymes (CarE,GSTs and MFO) in thrips were different from those in thrips feeding on healthy tomato plant.The activities of SOD in thrips were inhibited no matter which density and damage time of T.urticae.When thrips fed on tomato leaf damaged by T.urticae at the density of 5 mites/ leaf and 15 mites/leaf for three periods,the activities of SOD were reduced by 15.8％,27.7％,14.4％,and 26.4％,8.8％,17.3％ respectively.The enzyme activities of POD,CAT,CarE,GSTs and MFO were highest in thrips feeding on tomato plant damaged by T.urticae at the density of 5 mites/leaf for 3 days,and increased by 126.4％,17.7％,7.2％,6.7％ and 17.1％ respectively.The activities of the five enzymes all showed a downward trend with density increase and time extension,while the changes of protective and defensive enzymes were different.These results indicated that damage of T.urticae could induce the defensive responses of tomato plant,and cause the significant changes of protective and defensive enzymes activities of F.occidentalis.
Keywords：Tetranychus urticae Kochtomato plantFrankliniella occidentalis (Pergande)protective enzymesdefensive enzymes
Publication Date：2017-01-01
Online Publishing Date：2026-09-12(First online date of this platform, not the publication date of the document)
Pages：5( 79-82,87 )