| vector transmission of a plant-pathogenic bacterium in the arsenophonus clade sharing ecological traits with facultative insect endosymbionts. | the planthopper pentastiridius leporinus (hemiptera: cixiidae) is the major vector of a nonculturable plant-pathogenic gamma-3 proteobacterium associated with a disease of sugar beet called syndrome "basses richesses" (sbr). the bacterium, here called sbr bacterium, belongs to the arsenophonous clade, which includes mostly insect-associated facultative symbionts. assays using field-collected planthopper nymphs and adults were carried out to investigate the interaction of sbr bacterium with the i ... | 2009 | 19821733 |
| the prevalence of 'candidatus arsenophonus phytopathogenicus' infecting the planthopper pentastiridius leporinus (hemiptera: cixiidae) increase nonlinearly with the population abundance in sugar beet fields. | the planthopper pentastiridius leporinus (l.) (hemiptera: cixiidae) has been identified as the main vector of 'candidatus arsenophonus phytopathogenicus', a plant pathogenic bacterium associated to a sugar beet disease in eastern france called syndrome 'basses richesses'. in a 2-yr survey (2006-07), we quantified the abundance of p. leporinus populations migrating into 29 sugar beet fields in eastern france. sticky traps posted in these fields were monitored on a twice-weekly (2006) or weekly ( ... | 2011 | 22217748 |
| characterization and evolution of two bacteriome-inhabiting symbionts in cixiid planthoppers (hemiptera: fulgoromorpha: pentastirini). | like other plant sap-sucking insects, planthoppers within the family cixiidae (insecta: hemiptera: fulgoromorpha) host a diversified microbiota. we report the identification and first molecular characterization of symbiotic bacteria in cixiid planthoppers (tribe: pentastirini). using universal eubacterial primers we first screened the eubacterial 16s rrna sequences in pentastiridius leporinus (linnaeus) with pcr amplification, cloning, and restriction fragment analysis. we identified three main ... | 2009 | 19758348 |
| emergence and evolution of arsenophonus bacteria as insect-vectored plant pathogens. | arsenophonus bacteria are among the most biologically diverse and widespread endosymbionts of arthropods. notably, two species, phlomobacter fragariae and arsenophonus phytopathogenicus, have been characterized as phloem-restricted plant pathogens that are obligatorily transmitted by and hosted in planthoppers of the family cixiidae (hemiptera: auchenorrhyncha). here, i review the current understanding on the lifestyle transition, evolution, host interaction, and infection cycles of these emergi ... | 2014 | 24444593 |
| independent origins of vectored plant pathogenic bacteria from arthropod-associated arsenophonus endosymbionts. | the genus arsenophonus (gammaproteobacteria) is comprised of intracellular symbiotic bacteria that are widespread across the arthropods. these bacteria can significantly influence the ecology and life history of their hosts. for instance, arsenophonus nasoniae causes an excess of females in the progeny of parasitoid wasps by selectively killing the male embryos. other arsenophonus bacteria have been suspected to protect insect hosts from parasitoid wasps or to expand the host plant range of phyt ... | 2011 | 21892672 |
| ultrastructural detection of an unusual intranuclear bacterium in pentastiridius leporinus (hemiptera: cixiidae). | pentastiridius leporinus is an important vector of sugar beet pathogens in eastern france. an electron microscope survey on the insect-associated microflora revealed the occurrence of intranuclear prokaryotic cells in every internal organ analysed. these bacteria, which could also be found in the cytoplasm surrounding the nucleus, had a homogeneous coccoid (ca. 0.45 microm) or rod (0.45-1 microm) shape. the presence of three membrane layers was observed, the outermost forming a kind of vacuole c ... | 2008 | 17964596 |