| further evidence for the absence of bacteria in horsehair worms (nematomorpha: gordiidae). | we used molecular techniques to characterize bacteria associated with the nematomorph gordius robustus (leidy). this worm is a parasite of the fall field cricket, gryllus pennsylvanicus (burmeister), which is infected with the symbiotic bacteria, wolbachia. because of this close association, our a priori expectation was that g. robustus may be similarly infected. however, results of denaturing gradient gel electrophoresis and sequencing of amplified 16s rdna failed to detect any bacteria (symbio ... | 2009 | 19489671 |
| lateral phage transfer in obligate intracellular bacteria (wolbachia): verification from natural populations. | lateral transfer of mobile dna is a hallmark of bacteria with a free-living replicative stage; however, its significance in obligate intracellular bacteria and other heritable endosymbionts remains controversial. comparative sequence analyses from laboratory stocks infected with wolbachia pipientis provide some of the most compelling evidence that bacteriophage wo-b transfers laterally between infections of the same insect host. lateral transfer between coinfections, however, has been evaluated ... | 2010 | 19906794 |
| selective processing of calling songs by auditory interneurons in the female cricket, gryllus pennsylvanicus: possible roles in behavior. | female crickets (gryllus pennsylvanicus), caught in the field as nymphs, responded as adults in the laboratory with selective phonotaxis to model calling songs (css) that reproduced the dominant carrier frequencies and syllable periods (sps) characteristic of the male's natural calling song. extracellular recordings demonstrated two types of auditory interneurons in the female's cervical connectives that were very similar to the an1 and an2 neurons previously described in other gryllid species. ... | 2005 | 15828009 |