Article (Scientific journals)
Stress indicator gene expression profiles, colony dynamics and tissue development of honey bees exposed to sub-lethal doses of imidacloprid in laboratory and field experiments
De Smet, Lina; Hatjina; Ioannidis, Pavlos et al.
2017In PLoS ONE, 10 (137)
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Abstract :
[en] In this study, different context-dependent effects of imidacloprid exposure on the honey bee response were studied. Honey bees were exposed to different concentrations of imidacloprid during a time period of 40 days. Next to these variables, a laboratory-field comparison was conducted. The influence of the chronic exposure on gene expression levels was determined using an in-house developed microarray targeting different immunity-related and detoxification genes to determine stress-related gene expression changes. Increased levels of the detoxification genes encoding, CYP9Q3 and CYT P450, were detected in imidacloprid- exposed honey bees. The different context-dependent effects of imidacloprid exposure on honey bees were confirmed physiologically by decreased hypopharyngeal gland sizes. Honey bees exposed to imidacloprid in laboratory cages showed a general immunosuppression and no detoxification mechanisms were triggered significantly, while honey bees infield showed a resilient response with an immune stimulation at later time points. However, the treated colonies had a brood and population decline tendency after the first brood cycle in the field. In conclusion, this study highlighted the different context-dependent effects of imidacloprid exposure on the honey bee response. These findings warn for possible pitfalls concerning the generalization of results based on specific experiments with short exposure times. The increased levels of CYT P450 and CYP9Q3 combined with an immune response reaction can be used as markers for bees which are exposed to pesticides in the field.
Disciplines :
Entomology & pest control
Author, co-author :
De Smet, Lina;  Université de Gand > Faculté des Sciences, > Laboratoire d'Entomologie Moleculaire et Pathologie des abeilles
Hatjina;  Hellenic Agricultural Organisation `DEMETER', Nea Moudania, Greece > Institute of Animal Science > Division of Apiculture
Ioannidis, Pavlos;  Hellenic Agricultural Organisation `DEMETER', Nea Moudania, Greece > Institute of Animal Science > Division of Apiculture
Hamamtzoglou, Anna;  Hellenic Agricultural Organisation `DEMETER', Nea Moudania, Greece > Institute of Animal Science > Division of Apiculture
Schoonvaere, Karel;  Ghent University, Ghent > Faculty of Sciences > Laboratory of Molecular Entomology and Bee Pathology
Francis, Frédéric  ;  Université de Liège > Agronomie, Bio-ingénierie et Chimie (AgroBioChem) > Entomologie fonctionnelle et évolutive
Meeus, Ivan;  Ghent University > Faculty of Bioscience Engineering > Department of Crop Protection
Smagghe, Guy;  Ghent University > Faculty of Bioscience Engineering > Department of Crop Protection
de Graaf, Dirk C.;  Ghent University > Faculty of Sciences > Laboratory of Molecular Entomology and Bee Pathology
Language :
English
Title :
Stress indicator gene expression profiles, colony dynamics and tissue development of honey bees exposed to sub-lethal doses of imidacloprid in laboratory and field experiments
Publication date :
09 February 2017
Journal title :
PLoS ONE
eISSN :
1932-6203
Publisher :
Public Library of Science, United States - California
Volume :
10
Issue :
137
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 15 March 2017

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