Histopathology of an aphid,Schoutedenia lutea,parasitized by a gall midge,Pseudendaphis sp |
| |
Authors: | Ross M Lardner D Hales |
| |
Institution: | (1) School of Biological Sciences, Macquarie University, 2109, N.S.W., Australia;(2) Present address: Department of Entomology, University of Adelaide, Waite Agricultural Research Institute, 5064 Glen Osmond, South Australia |
| |
Abstract: | Pseudendaphis sp. (Barnes) Diptera: Cecidomyiidae] is a larval endoparasitoid of the aphidSchoutedenia lutea (van der Goot) Aphididae: Greenideinae]. A brief investigation of the biology ofPseudendaphis sp. revealed that parasitization by this species occurs only in viviparous instar III to adult life stages of the host aphid.
Comparative histology of parasitized, unparasitized and starved aphids was used to evaluate proposed mechanisms of pathogenesis.
Parasitization byPseudendaphis sp. was found to cause the destruction of host embryos and pathological changes in the host fat body, yet resulted in an
increase in the number of host mycetocytes. There was no evidence of injury to host tissues through direct physical attack,
a cytolytic enzyme or starvation-like factors. Remaining hypotheses for altered host histologies in parasitized aphids are
selective nutrient depletion and production of a non-cytolytic bioactive substance by thePseudendaphis larvae.
|
| |
Keywords: | Pseudendaphis Schoutedenia lutea parasitization histopathology |
本文献已被 SpringerLink 等数据库收录! |
|