| Title: | Odor-mediated response of gravid Aedes aegypti to mosquito-associated symbiotic bacteria |
| Author(s): | Mosquera KD; Khan Z; Wondwosen B; Alsanius B; Hill SR; Ignell R; Lorenzo MG; |
| Address: | "Vector Behavior and Pathogen Interaction Group, Instituto Rene Rachou, Fiocruz Minas, Belo Horizonte, Brazil. Disease Vector Group, Department of Plant Protection Biology, Swedish University of Agricultural Sciences, Alnarp, Sweden. Department of Zoological Sciences, Addis Ababa University, Addis Ababa, Ethiopia. Microbial Horticulture Group, Department of Biosystems and Technology, Swedish University of Agricultural Sciences, Alnarp, Sweden. Vector Behavior and Pathogen Interaction Group, Instituto Rene Rachou, Fiocruz Minas, Belo Horizonte, Brazil. Electronic address: marcelo.lorenzo@fiocruz.br" |
| DOI: | 10.1016/j.actatropica.2022.106730 |
| ISSN/ISBN: | 1873-6254 (Electronic) 0001-706X (Linking) |
| Abstract: | "Complex oviposition decisions allow gravid Aedes aegypti mosquitoes to select suitable sites for egg-laying to increase the probability that their progeny will thrive. The bacterial communities present in larval niches influence mosquito oviposition behavior, and gravid mosquitoes transmit key microbial associates to breeding sites during oviposition. Our study evaluated whether symbiotic Klebsiella sp., which are strongly associated with mosquitoes, emit volatiles that affect mosquito oviposition decisions. Dual-choice behavioral assays demonstrated that volatile organic compounds emitted by Klebsiella sp. induce a preference in oviposition decisions by Ae. aegypti. Bacterial headspace volatiles were sampled by solid-phase microextraction, and subsequent combined gas chromatography and electroantennogram detection analysis, revealed that the antennae of gravid females detect two compounds present in the Klebsiella sp. headspace. These compounds were identified by gas chromatography and mass spectrometry as 2-ethyl hexanol and 2,4-di?ª╡tert-butylphenol. The binary blend of these compounds elicited a dose-dependent egg-laying preference by gravid mosquitoes. We propose that bacterial symbionts, which are associated with gravid mosquitoes and may be transferred to aquatic habitats during egg-laying, together with their volatiles act as oviposition cues indicating the suitability of active breeding sites to conspecific females" |
| Keywords: | Female Animals *Aedes/physiology Odorants Gas Chromatography-Mass Spectrometry Oviposition Bacteria Bacterial volatiles Chemical ecology Klebsiella sp.Olfaction; |
| Notes: | "MedlineMosquera, Katherine D Khan, Zaid Wondwosen, Betelehem Alsanius, Beatrix Hill, Sharon R Ignell, Rickard Lorenzo, Marcelo G eng MR/N017455/1/MRC_/Medical Research Council/United Kingdom Netherlands 2022/10/25 Acta Trop. 2023 Jan; 237:106730. doi: 10.1016/j.actatropica.2022.106730. Epub 2022 Oct 21" |
