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The fly factor phenomenon is mediated by interkingdom signaling between bacterial symbionts and their blow fly hosts

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Insect Science 2020年第2期27卷 256-265页

作者： yonathan uriel Regine Gries Loma Tu Cassandra Carroll Huimin Zhai Margo Moore Gerhard Gries Department of Biological Sciences Simon Fraser UniversityBurnabyBritish ColumbiaCanada

We tested the recent hypothesis that the"fly factor"phenomenon(food cur-rently or previously fed on by flies attracts more flies than the same type of food kept inccessible to flies)is mediated by bacterial symbionts deposited with feees or regur-gitated by feeding *** allowed laboratory-reared black blow flies,Phormia regina(Meigen),to feed and de fecate on bacterial Luria-Bertani medium solidified with agar,and isolated seven morphologically distinct bacterial *** identified these us-ing matrix-assisted laser desorption/ionization mass spectrometry and sequencing of the 165 rRNA *** two-choice laboratory experiments,traps baited with cultures of Pro-teus mirabilis Hauser,Morganella morganii *** Jensen,or Serratia marcescens Bizio,captured significantly more flies than corresponding control jars baited with tryptic soy agar only.A mixture of seven bacterial strains as a trap bait was more attractive to flies than a single bacterial isolate(***).In a field experiment,traps baited with agar cultures of P:mirabilis and M.m siboni in combination captured significantly more flies than lraps baited with either bacterial isolate alone or the agar *** evident by gas chromatography-mass spectrometry,the odor profiles of bacterial isolates differ,which may explain the additive effect of bacteria to the attractiveness of bacterial trap ***"generalist bacteria,"P mirabilis and *** growing on animal protein(beef liver)or plant protein(tofu)are similarly effective in attracting ***-derived airborne semiochemicals appear to mediate foraging by flies and to inform their feeding and oviposition decisions.

关键词： blow fies enteric bacteria fly foctor interk ingdom commumicaion micro-bial symbionts semioche mical atractants

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