Koga, Ryuichi


Publications
10

Genome analysis of “Candidatus Aschnera chinzeii,” the bacterial endosymbiont of the blood-sucking bat fly Penicillidia jenynsii (Insecta: Diptera: Nycteribiidae)

Citation
Koga et al. (2024). Frontiers in Microbiology 14
Names
“Aschnera chinzeii”
Abstract
Insect–microbe endosymbiotic associations are omnipresent in nature, wherein the symbiotic microbes often play pivotal biological roles for their host insects. In particular, insects utilizing nutritionally imbalanced food sources are dependent on specific microbial symbionts to compensate for the nutritional deficiency via provisioning of B vitamins in blood-feeding insects, such as tsetse flies, lice, and bedbugs. Bat flies of the family Nycteribiidae (Diptera) are blood-sucking ectoparasites

Genome Analysis of “ Candidatus Regiella insecticola” Strain TUt, Facultative Bacterial Symbiont of the Pea Aphid Acyrthosiphon pisum

Citation
Nikoh et al. (2020). Microbiology Resource Announcements 9 (40)
Names
Ca. Regiella insecticola
Abstract
The genome of “ Candidatus Regiella insecticola” strain TUt, a facultative bacterial symbiont of the pea aphid Acyrthosiphon pisum , was analyzed. We determined a 2.5-Mb draft genome consisting of 14 contigs; this will contribute to the understanding of the symbiont, which underpins various ecologically adaptive traits of the host insect.

Genome Sequence of “ Candidatus Serratia symbiotica” Strain IS, a Facultative Bacterial Symbiont of the Pea Aphid Acyrthosiphon pisum

Citation
Nikoh et al. (2019). Microbiology Resource Announcements 8 (19)
Names
Ca. Serratia symbiotica
Abstract
“ Candidatus Serratia symbiotica” is a facultative bacterial symbiont of aphids that affects various ecological traits of the host insects. Here, we report the complete genome sequence of “ Candidatus Serratia symbiotica” strain IS, consisting of a 2,736,352-bp chromosome and an 82,605-bp plasmid, from the pea aphid Acyrthosiphon pisum .

Genomic Insight into Symbiosis-Induced Insect Color Change by a Facultative Bacterial Endosymbiont, “ Candidatus Rickettsiella viridis”

Citation
Nikoh et al. (2018). mBio 9 (3)
Names
Ca. Rickettsiella viridis
Abstract
ABSTRACT Members of the genus Rickettsiella are bacterial pathogens of insects and other arthropods. Recently, a novel facultative endosymbiont, “ Candidatus Rickettsiella viridis,” was described in the pea aphid Acyrthosiphon pisum , whose infection causes a striking host phenotype: red and green genetic color morphs exist in aphid populations, and upon infection with the symbiont, red aphids become g

Phenotypic Effect of “Candidatus Rickettsiella viridis,” a Facultative Symbiont of the Pea Aphid (Acyrthosiphon pisum), and Its Interaction with a Coexisting Symbiont

Citation
Tsuchida et al. (2013). Applied and Environmental Microbiology 80 (2)
Names
Ca. Rickettsiella viridis
Abstract
ABSTRACTA gammaproteobacterial facultative symbiont of the genusRickettsiellawas recently identified in the pea aphid,Acyrthosiphon pisum. Infection with this symbiont altered the color of the aphid body from red to green, potentially affecting the host's ecological characteristics, such as attractiveness to different natural enemies. In European populations ofA. pisum, the majority ofRickettsiella-infected aphids also harbor another facultative symbiont, of the genusHamiltonella. We investigate

“ Candidatus Curculioniphilus buchneri,” a Novel Clade of Bacterial Endocellular Symbionts from Weevils of the Genus Curculio

Citation
Toju et al. (2010). Applied and Environmental Microbiology 76 (1)
Names
“Curculioniphilus buchneri”
Abstract
ABSTRACT Here we investigated the bacterial endosymbionts of weevils of the genus Curculio . From all four species of Curculio weevils examined, a novel group of bacterial gene sequences were consistently identified. Molecular phylogenetic analyses demonstrated that the sequences formed a distinct clade in the Gammaproteobacteria , which was not related to previously known groups of weevil endosymbiont