Basis of the trade-off between parasitoid resistance and larval competitive ability in Drosophila melanogaster.
AUTOR(ES)
Kraaijeveld, A R
RESUMO
Drosophila melanogaster can be artificially selected for increased resistance against parasitoid wasps that attack the larvae. Lines selected for greater resistance are poorer larval competitors under conditions of resource scarcity. Here we investigated the mechanistic basis of this apparent trade-off. We found that resistant lines have approximately twice the density of haemocytes (blood cells) than that of controls. Haemocytes are involved in encapsulation, the chief cellular immune defence against parasitoids. We have previously shown that resistant lines feed more slowly than controls and hypothesize that limiting resources are being switched from trophic to defensive functions.
ACESSO AO ARTIGO
http://www.pubmedcentral.nih.gov/articlerender.fcgi?artid=1088600Documentos Relacionados
- Trade-off between r-selection and K-selection in Drosophila populations
- The trade-off between incentives and endogenous risk
- O trade-off entre os buffers de capacidade de produção e de estoque.
- Trade-off between age of first reproduction and survival in a female primate
- Trade-off in plant-ant interactions: seasonal variations