Role of venom and ovarian proteins in immune suppression of Ostrinia furnacalis （Lepidoptera： Pyralidae） larvae parasitized by Macrocentrus cingulum （Hymenoptera： Braconidae）, a polyembryonic parasitoid

作     者：YONG LI JIAN-FENG LU CONG-JING FENG XIN KE WEN-JUN FU 

作者机构：Institute of Plant Physiology and Ecology Chinese Academy of Sciences Shanghai School of Bioteclmology and Food Engineering Hefei University of Technology Hefei School of Horticulture and Plant Protection Yangzhou University Yangzhou China 

出 版 物：《Insect Science》 (昆虫科学（英文版）)

年 卷 期：2007年第14卷第2期

页      面：93-100页

核心收录：

学科分类：09[农学] 0904[农学-植物保护] 090401[农学-植物病理学] 090402[农学-农业昆虫与害虫防治] 

基　　金：Acknowledgments We thank X.G. Qiu, and Z.L. Qiu, for culturing insects. This study was supported by the National Natural Science Foundation of China (30370195 30571248) 

主　　题：encapsulation Macrocentrus cingulum Ostriniafunacalis ovarian proteins spreading venom 

摘      要：Venom and ovarian proteins in braconid and ichneumonid wasps play an important role in the successful parasitism of their host, especially for immune suppression immediately after oviposition. In this study, we compared the effect of venom and ovarian proteins collected from the female wasps of Macrocentrus cingulum, a polyembryonic parasitoid of the larvae of Ostriniafunacalis, on the encapsulation capacity of Sephadex A- 25 beads at 4 h and 24 h post-injection both in vivo and in vitro. The results showed that the ovarian proteins significantly interfered with the encapsulation capacity of hemocytes in a dose-dependent manner. Spreading and viability of hemocytes in O. furnacalis was not disrupted by venom and ovarian proteins at various concentrations injected. It seems likely that the ovarian proteins from M. cingulum play a role in suppressing the encapsulation capacity of host hemocytes.