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Journal of Insect Physiology

Jose, P.A., Department of Entomology, Faculty of Agriculture, Food and Environment, Hebrew University of Jerusalem, POB 12, Rehovot, 7610001, Israel, Department of Microbiology and Plant Pathology, Faculty of Agriculture, Food and Environment, Hebrew University of Jerusalem, POB 12, Rehovot, 7610001, Israel; Jurkevitch, E., Department of Microbiology and Plant Pathology, Faculty of Agriculture, Food and Environment, Hebrew University of Jerusalem, POB 12, Rehovot, 7610001, Israel; Yuval, B., Department of Entomology, Faculty of Agriculture, Food and Environment, Hebrew University of Jerusalem, POB 12, Rehovot, 7610001, Israel

Microbial associations are widespread across the insects. In the olive fruit fly Bactrocera oleae (Diptera: Tephritidae), vertically transmitted gut symbionts contribute to larval development inside the olive host, and to adult nutrition. Nevertheless, their effect on behavioural decisions of adults is unknown. In this study, we show that symbiotic bacteria affect oviposition behaviour in B. oleae. We studied the effect of different fruits as hosts and different gut-bacteria as gut-symbionts on oviposition attempts and fly development in B. oleae. Untreated flies that had native gut-symbionts attempted oviposition significantly more times than axenic flies as well as flies treated with medfly-associated Pantoea or Klebsiella bacteria. Axenic flies provided with a diet containing the homogenized gut of symbiotic flies recovered the same number of oviposition attempts as their symbiotic counterparts. As for as the different hosts, green olives (unripe) and grapes were preferred while black olives (ripe) elicited the least number of oviposition attempts, with an interactive effect of host and bacterial treatments. It appears that both the host attributes and the native gut-symbionts drive oviposition preference towards green olives in B. oleae. Moreover, both bacterial treatments and hosts significantly affected the development of B. oleae larvae. Though grapes elicited as many oviposition attempts as green olives, they yielded no pupae. Taken together, our results suggest that the intimate association between B. oleae and their gut-microbes, extends beyond nutritional support to behaviour. © 2019 Elsevier Ltd

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Symbiotic bacteria affect oviposition behavior in the olive fruit fly Bactrocera oleae
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Jose, P.A., Department of Entomology, Faculty of Agriculture, Food and Environment, Hebrew University of Jerusalem, POB 12, Rehovot, 7610001, Israel, Department of Microbiology and Plant Pathology, Faculty of Agriculture, Food and Environment, Hebrew University of Jerusalem, POB 12, Rehovot, 7610001, Israel; Jurkevitch, E., Department of Microbiology and Plant Pathology, Faculty of Agriculture, Food and Environment, Hebrew University of Jerusalem, POB 12, Rehovot, 7610001, Israel; Yuval, B., Department of Entomology, Faculty of Agriculture, Food and Environment, Hebrew University of Jerusalem, POB 12, Rehovot, 7610001, Israel

Symbiotic bacteria affect oviposition behavior in the olive fruit fly Bactrocera oleae

Microbial associations are widespread across the insects. In the olive fruit fly Bactrocera oleae (Diptera: Tephritidae), vertically transmitted gut symbionts contribute to larval development inside the olive host, and to adult nutrition. Nevertheless, their effect on behavioural decisions of adults is unknown. In this study, we show that symbiotic bacteria affect oviposition behaviour in B. oleae. We studied the effect of different fruits as hosts and different gut-bacteria as gut-symbionts on oviposition attempts and fly development in B. oleae. Untreated flies that had native gut-symbionts attempted oviposition significantly more times than axenic flies as well as flies treated with medfly-associated Pantoea or Klebsiella bacteria. Axenic flies provided with a diet containing the homogenized gut of symbiotic flies recovered the same number of oviposition attempts as their symbiotic counterparts. As for as the different hosts, green olives (unripe) and grapes were preferred while black olives (ripe) elicited the least number of oviposition attempts, with an interactive effect of host and bacterial treatments. It appears that both the host attributes and the native gut-symbionts drive oviposition preference towards green olives in B. oleae. Moreover, both bacterial treatments and hosts significantly affected the development of B. oleae larvae. Though grapes elicited as many oviposition attempts as green olives, they yielded no pupae. Taken together, our results suggest that the intimate association between B. oleae and their gut-microbes, extends beyond nutritional support to behaviour. © 2019 Elsevier Ltd

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