烟蚜茧蜂毒蛋白对寄主生长发育的影响

Effects of Aphidius gifuensis Toxic Protein on Growth and Development of Aphis

研究了烟蚜茧蜂毒蛋白畸形细胞、毒液和萼液,对寄主蚜虫的生长发育的影响。通过利用过寄生和假寄生的研究方法,证明寄生蜂寄生过程中产生的毒蛋白对寄主生长发育有明显影响。结果显示,毒液和萼液能显著延长若虫的发育;正常寄生后,寄生蜂毒蛋白使寄主始终处于抑制状态,并对其免疫系统产生抑制作用,毒蛋白的量增加加大了对寄主的抑制程度。研究结果表明,假寄生与正常寄生后寄主的生长和发育有明显差异,部分原因可能是由畸形细胞引起的。

The parasitoid Aphidius gifuensis -host aphid system was used to evaluate the regulatory effects of wasp-associated factors, i.e. teratocytes, venom and calyx fluid, on the growth and development of the host larvae by means of pseudoparasitism and superparasitism. The results showed that after pseudoparasitism the host larvae were distinctly prolonged in the developmental duration. The development and immune system of normally parasitized host larvae was constantly checked as compared with that of the non-parasitized larvae. Superparasitism could strengthen the inhibition of host development, probably due to more physiological doses ofteratocytes, venom and calyx fluid injected into the host larvae at wasp oviposition. It is indicated that there were many differences between the larval development and growth of the naturally parasitized and pseudoparasitized hosts, which were probably partially resulted from the functions of teratocvtes.