Horn, Matthias


Publications
21

The Pine Bark Adelgid, Pineus strobi, Contains Two Novel Bacteriocyte-Associated Gammaproteobacterial Symbionts

Citation
Toenshoff et al. (2014). Applied and Environmental Microbiology 80 (3)
Names
“Theodorhartigia pinicola” “Annandiella pinicola” “Theodorhartigia”
Abstract
ABSTRACT Bacterial endosymbionts of the pine bark adelgid, Pineus strobi (Insecta: Hemiptera: Adelgidae), were investigated using transmission electron microscopy, 16S and 23S rRNA-based phylogeny, and fluorescence in situ hybridization. Two morphologically different symbionts affiliated with the Gammaproteobacteria were present in distinct bacteriocytes. One of them (“ Candidatus

The Genome of the Amoeba Symbiont “ Candidatus Amoebophilus asiaticus” Reveals Common Mechanisms for Host Cell Interaction among Amoeba-Associated Bacteria

Citation
Schmitz-Esser et al. (2010). Journal of Bacteriology 192 (4)
Names
Ca. Amoebophilus asiaticus
Abstract
ABSTRACT Protozoa play host for many intracellular bacteria and are important for the adaptation of pathogenic bacteria to eukaryotic cells. We analyzed the genome sequence of “ Candidatus Amoebophilus asiaticus,” an obligate intracellular amoeba symbiont belonging to the Bacteroidetes . The genome has a size of 1.89 Mbp, encodes 1,557 proteins, and shows massive proliferation of IS elements (24% of all genes), although the g

Candidatus Thiobios zoothamnicoli,” an Ectosymbiotic Bacterium Covering the Giant Marine Ciliate Zoothamnium niveum

Citation
Rinke et al. (2006). Applied and Environmental Microbiology 72 (3)
Names
“Thiobios zoothamnicoli”
Abstract
ABSTRACT Zoothamnium niveum is a giant, colonial marine ciliate from sulfide-rich habitats obligatorily covered with chemoautotrophic, sulfide-oxidizing bacteria which appear as coccoid rods and rods with a series of intermediate shapes. Comparative 16S rRNA gene sequence analysis and fluorescence in situ hybridization showed that the ectosymbiont of Z. niveum belongs to only one pleomorphic phylotype. The Z. niveum

‘Candidatus Protochlamydia amoebophila’, an endosymbiont of Acanthamoeba spp

Citation
Collingro et al. (2005). International Journal of Systematic and Evolutionary Microbiology 55 (5)
Names
Ca. Protochlamydia amoebophila
Abstract
The obligately intracellular coccoid bacterium UWE25, a symbiont of Acanthamoeba spp., was previously identified as being related to chlamydiae based upon the presence of a chlamydia-like developmental cycle and its 16S rRNA gene sequence. Analysis of its complete genome sequence demonstrated that UWE25 shows many characteristic features of chlamydiae, including dependency on host-derived metabolites, composition of the cell envelope and the ability to thrive as an energy parasite within the cel

Novel chlamydiae in whiteflies and scale insects: endosymbionts ‘Candidatus Fritschea bemisiae’ strain Falk and ‘Candidatus Fritschea eriococci’ strain Elm

Citation
Everett et al. (2005). International Journal of Systematic and Evolutionary Microbiology 55 (4)
Names
“Fritschea eriococci” “Fritschea bemisiae”
Abstract
Bacteria called ‘Fritschea’ are endosymbionts of the plant-feeding whitefly Bemisia tabaci and scale insect Eriococcus spurius. In the gut of B. tabaci, these bacteria live within bacteriocyte cells that are transmitted directly from the parent to oocytes. Whiteflies cause serious economic damage to many agricultural crops; B. tabaci fecundity and host range are less than those of Bemisia argentifolii, possibly due to the presence of this endosymbiont. The B. tabaci endosymbiont has been charact