INBIOTEC   24408
INSTITUTO DE INVESTIGACIONES EN BIODIVERSIDAD Y BIOTECNOLOGIA
Unidad Ejecutora - UE
congresos y reuniones científicas
Título:
How apicultural practices and Nosema ceranae affect individual honey bee health?
Autor/es:
GARRIDO PM; ANTÚNEZ K; PORRINI M; BRANCHICCELA MB; MARTÍNEZ NOËL G; ZUNINO P; EGUARAS MJ
Lugar:
Londres
Reunión:
Congreso; The Impact of Pesticides on bee health; 2014
Institución organizadora:
The British Ecological Society, Biochemical Society, Society for Experimental Biology
Resumen:
Honey bee colonies are exposed to pesticides used in agriculture or within bee hives by beekeeper intervention. The organophosphate coumaphos and the pyrethroid tau-fluvalinate are widely used to control Varroa destructor. These acaricides are applied directly to bee hives, accumulate in wax and had been detected even in commercial bee wax foundation. Nosemosis caused by Nosema ceranae is one of the most prevalent and pathogenic disease that affect adult honeybees. Interactive effects between N. ceranae and sublethal dosis of these acaricides (at concentrations found in honey) on immune related genes were assessed. In order to allow honeybee development under a free-acaricide environment, plastic foundation was used and bees drawn out the foundation. Gene expression changes in nurse bees were measured using qPCR. This work demonstrates that chronic exposure with tau-fluvalinate significantly reduced the transcription of genes encoding the antimicrobian peptides abaecin and hymenoptaecin. Coumaphos decreased vitellogenin and lysozyme expression and, in combination with N. ceranae infection, reduced levels of abaecin and enhance phenoloxidase transcripts. Only defensin and glucose dehydrogenase genes were not altered by the different treatments. Immune response at individual level and susceptibility to pathogens may be compromised when honeybees are exposed not only to sublethal doses of acaricides but N. ceranae infection and their interactive effects.