Antifeedant effects of plant lectins and an enzyme on the adult stage of the rice brown planthopper,Nilaparvata lugens |
| |
Authors: | K S Powell A M R Gatehouse V A Hilder and J A Gatehouse |
| |
Institution: | (1) Department of Biological Sciences, University of Durham, South Road, DH1 3LE Durham, UK |
| |
Abstract: | The feeding activity of adult rice brown planthopper,Nilaparvata lugens (Stal) on selected proteins incorporated into artificial diets was examined, based on quantitative analysis of honeydew excretion,
in order to determine the mechanism of action of antimetabolic proteins towards homopteran pests. The lectinsGalanthus nivalis agglutinin (GNA), wheat germ agglutinin (WGA) and the enzyme soybean lipoxygenase (LPO), previously demonstrated to be toxic
to this insect, reduced honeydew excretion levels of adultNilaparvata lugens over a 24 h period when incorporated into artificial diet at 0.1% {w:v}, indicating that these proteins acted as antifeedants.
Of the proteins tested GNA was the most effective antifeedant, reducing honeydew droplet production by 96%, although after
24 h there was some recovery in the honeydew excretion levels and thus the insects appeared to tolerate the presence of the
antifeedant with time. The lectinPisum sativum agglutinin (PSA), previously demonstrated to be non-toxic, showed no antifeedant properties. |
| |
Keywords: | Nilaparvata lugens Galanthus nivalis agglutinin wheat germ agglutinin soybean lipoxygenase honeydew artificial diet antifeedant |
本文献已被 SpringerLink 等数据库收录! |
|