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Trade-off between cellular immunity and life span in meal- worm beetles Tenebrio molitor 被引量:1
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作者 Indrikis KRAmS Janina DAUKSTE +4 位作者 Inese KIVLENIECE Ants KAASIK Tatjana KRAmA todd m. freeberg markus J. RANTALA 《Current Zoology》 SCIE CAS CSCD 2013年第3期340-346,共7页
Encapsulation is a nonspecific, cellular response through which insects defend themselves against multicellular pathogens. During this immune reaction, haemocytes recognize an object as foreign and cause other haemocy... Encapsulation is a nonspecific, cellular response through which insects defend themselves against multicellular pathogens. During this immune reaction, haemocytes recognize an object as foreign and cause other haemocytes to aggregate and form a capsule around the object, often consisting of melanized cells. The process of melanisation is accompanied by the forma- tion of potentially toxic reactive oxygen species, which can kill not only pathogens but also host cells. In this study we tested whether the encapsulation response is costly in mealworm beetles Tenebrio molitor. We found a negative relationship between the duration of implantation via a nylon monofilament and remaining life span. We also found a negative relationship between the strength of immune response and remaining life span, suggesting that cellular immunity is costly in T. molitor, and that there is a trade-off between immune response and remaining life span. However, this relationship disappeared at 31-32 hours of implanta- tion at 25 ± 2℃. As the disappearance of a relationship between duration of implantation and lifespan coincided with the highest values of encapsulation response, we concluded that the beetles stopped investment in the production of melanotic cells, as the implant, a synthetic parasite, was fully isolated from the host's tissues . 展开更多
关键词 Cost of immunity Cellular immunity ENCAPSULATION LIFESPAN Tenebrio molitor
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