Origin and identification of bacteria which produce kairomones in the frass ofAcrolepiopsis assectella (Lep., Hyponomeutoidea)

Thibout, É.; Guillot, J.F.; Ferary, S.; Limouzin, P.; Auger, J.

doi:10.1007/bf01946919

Cited by 35 publications

(18 citation statements)

References 15 publications

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“…Commensal gut microbiota of locusts were previously shown to continually produce aggregation pheromones in frass [13][14][15]. Klebsiella oxytoca and several Bacillus species in the feces of Acrolepiopsis assectella produced kairomones that attract parasitoids [59]. Volatiles in D. valens frass have been illustrated to affect adult beetles' behavior [9,34].…”

Section: Discussionmentioning

confidence: 98%

Gut-Associated Bacteria of Dendroctonus valens and their Involvement in Verbenone Production

et al. 2015

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Bark beetles are the most important mortality agent in coniferous forests, and pheromones play important roles in their management. Dendroctonus valens LeConte was introduced from North America to China and has killed millions of healthy pines there. Trapping with semiochemicals and pheromones was deployed in D. valens management in the last decade, but little is known about the ability of gut bacteria to produce the pheromone. In this study, we analyzed the volatiles in D. valens guts and frass after antibiotic treatment versus control. Then, we isolated and identified the bacteria in D. valens guts and frass, examined verbenone (a multifunctional pheromone of D. valens) production by 16 gut bacterial isolates from the precursor cis-verbenol at three concentrations, and further compared the cytotoxicities between the cis-verbenol and verbenone to the bacterial isolates. cis-Verbenol was not detected in the frass in the control group, but it was in the antibiotic treatment. The amount of verbenone was significantly suppressed in D. valens guts after antibiotic treatment versus control. Thirteen out of 16 gut bacterial isolates were capable of cis-verbenol to verbenone conversion, and cis-verbenol had stronger cytotoxicities than verbenone to all tested gut bacterial isolates. The bacterial species capable of verbenone production largely exists in D. valens guts and frass, suggesting that gut-associated bacteria may help the bark beetle produce the pheromone verbenone in guts and frass. The bacteria may benefit from the conversion due to the reduced cytotoxicity from the precursor to the beetle pheromone.

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Section: Discussionmentioning

confidence: 98%

Gut-Associated Bacteria of Dendroctonus valens and their Involvement in Verbenone Production

et al. 2015

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“…These authors also suggested that stable fly development depends on a live microbial community in the natural habitat and that fly females are capable of selecting an oviposition site based on the microbially derived stimuli that indicate the suitability of the substrate for larval development. Hymenoptera Thibout et al (1993Thibout et al ( , 1995 have identified sulphur containing volatiles such as alkyl disulphides (dimethyl Table 4 Semiochemically mediated interactions between bacteria and Diptera (Muscidae) P. D. Leroy et al disulphide and dipropyl disulphide) from bacteria (Bacillus sp. and Klebsiella oxytoca) which attract and help the parasitoid Diadromus pulchellus (Hymenoptera: Ichneumonidae) to locate its hosts Acrolepiopsis assectella (Table 5).…”

Section: Muscidaementioning

confidence: 99%

The semiochemically mediated interactions between bacteria and insects

et al. 2011

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In natural environment, semiochemicals are involved in many interactions between the different trophic levels involving insects, plants and hosts for parasitoids or prey for predators. These volatile compounds act as messengers within or between insect species, inducing particular behaviours, such as the localisation of a source of food, the orientation to an adequate oviposition site, the selection of a suitable breeding site and the localisation of hosts or prey. In this sense, bacteria have been shown to play an important role in the production of volatile compounds which ones act as semiochemicals. This review, focusing on the semiochemically mediated interactions between bacteria and insects, highlights that bacterial semiochemicals act as important messengers for insects. Indeed, in most of the studies reported here, insects respond to specific volatiles emitted by specific bacteria hosted by the insect itself (gut, mouthparts, etc.) or present in the natural environment where the insect evolves. Particularly, bacteria from the families Enterobacteriaceae, Pseudomonaceae and Bacillaceae are involved in many interactions with insects. Because semiochemicals naturally produced by bacteria could be a very interesting option for pest management, advances in this field are discussed in the context of biological control against insect pests.

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“…This was done by comparing between the responses of C. marginiventris females towards odors from frass derived from Bt maize tissue and responses towards odors from frass derived from conventional maize tissue treated with the broad-spectrum antibiotic tetracycline. Previous studies showed that bacteria present in the gut and frass of insects are responsible for producing volatiles that are attractive to parasitoid females (Auger et al 1990;Thibout et al 1993Thibout et al , 1995, and that lepidopteran gut bacteria are generally susceptible to tetracycline (Visotto et al 2009). Our study is the first to question whether GM crops, including Bt maize, negatively affect chemical communication between foraging parasitoids and their hosts via alteration of host frass, an important source of odors that are useful for locating hosts at short ranges.…”

Section: Introductionmentioning

confidence: 99%

Attraction of the parasitoid Cotesia marginiventris to host (Spodoptera frugiperda) frass is affected by transgenic maize

Desneux¹,

Ramírez-Romero

Bokonon-Ganta³

2010

Ecotoxicology

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We assessed in the laboratory the attraction of the parasitoid Cotesia marginiventris (Cresson) toward odors emitted by conventional maize (Zea mays L. ssp. mays) and Bt (Bacillus thuringiensis) maize seedlings following actual or simulated injury by Spodoptera frugiperda (Smith), the parasitoid's host, and emitted by the host's frass, produced following consumption of conventional or Bt maize seedlings. Females of C. marginiventris exhibited similarly strong responses to conventional and Bt maize seedlings injured by the host or with simulated injury, and these were stronger than responses to clean air. In contrast, the responses of C. marginiventris females were consistently weaker toward host frass derived from Bt maize tissue compared to frass derived from conventional maize tissue. We hypothesized that the weakened response was due to a detrimental effect of Bt endotoxins, present in the Bt maize tissue, on the bacterial community present in the host's gut and frass, including bacteria that produce odors attractive to C. marginiventris. As an initial test of our hypothesis, we compared between the responses of C. marginiventris females to host frass produced following consumption of Bt maize and frass produced from conventional maize which had been treated with an antibiotic (tetracycline) to eliminate host gut bacteria. Our results showed that C. marginiventris females responded similarly weakly to host frass derived from conventional maize tissue treated with antibiotic and to frass derived from Bt maize tissue, treated or untreated with antibiotic, while they responded strongly to frass derived from conventional maize untreated with antibiotic, so provided initial, partial support for our hypothesis. We discussed the weakened response of C. marginiventris females to host frass derived from Bt maize in the context of plausible impacts of transgenic crop cultivars on parasitoid foraging and populations, and the implications for biological control of non-target, polyphagous pests, such as S. frugiperda.

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Origin and identification of bacteria which produce kairomones in the frass ofAcrolepiopsis assectella (Lep., Hyponomeutoidea)

Cited by 35 publications

References 15 publications

Gut-Associated Bacteria of Dendroctonus valens and their Involvement in Verbenone Production

Gut-Associated Bacteria of Dendroctonus valens and their Involvement in Verbenone Production

The semiochemically mediated interactions between bacteria and insects

Attraction of the parasitoid Cotesia marginiventris to host (Spodoptera frugiperda) frass is affected by transgenic maize

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