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Evolutionary Relationships of Three New Species of Enterobacteriaceae Living as Symbionts of Aphids and Other Insects

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TLDR
Phylogenetic analyses of partial sequences of gyrB and recA are consistent with previous analyses limited to 16S rRNA gene sequences and yield improved confidence of the evolutionary relationships of these symbionts.
Abstract
Ecological studies on three bacterial lineages symbiotic in aphids have shown that they impose a variety of effects on their hosts, including resistance to parasitoids and tolerance to heat stress. Phylogenetic analyses of partial sequences of gyrB and recA are consistent with previous analyses limited to 16S rRNA gene sequences and yield improved confidence of the evolutionary relationships of these symbionts. All three symbionts are in the Enterobacteriaceae. One of the symbionts, here given the provisional designation “Candidatus Serratia symbiotica,” is a Serratia species that has acquired a symbiotic lifestyle. The other two symbionts, here designated “Candidatus Hamiltonella defensa” and “Candidatus Regiella insecticola,” are sister groups to one another and together show a relationship to species of Photorhabdus.

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Journal ArticleDOI

Genomics and Evolution of Heritable Bacterial Symbionts

TL;DR: Insect heritable symbionts provide some of the extremes of cellular genomes, including the smallest and the fastest evolving, raising new questions about the limits of evolution of life.
Journal ArticleDOI

Genome Sequence of the Pea Aphid Acyrthosiphon pisum

Stephen Richards, +223 more
- 01 Jan 2010 - 
TL;DR: The genome of the pea aphid shows remarkable levels of gene duplication and equally remarkable gene absences that shed light on aspects of aphid biology, most especially its symbiosis with Buchnera.
Journal ArticleDOI

Facultative Symbionts in Aphids and the Horizontal Transfer of Ecologically Important Traits

TL;DR: Experiments on pea aphids have demonstrated that facultative symbionts protect against entomopathogenic fungi and parasitoid wasps, ameliorate the detrimental effects of heat, and influence host plant suitability.
Journal ArticleDOI

Aphid Protected from Pathogen by Endosymbiont

TL;DR: It is shown that one of the three most common facultative symbionts of pea aphid (Acyrthosiphon pisum), the bacterium Regiella insecticola, has a major effect on host resistance to a fungal pathogen.
Journal ArticleDOI

Bacterial communities of diverse Drosophila species: ecological context of a host-microbe model system.

TL;DR: It is found that Drosophilid flies have taxonomically restricted bacterial communities, with 85% of the natural bacterial microbiome composed of only four bacterial families, suggesting that the host exercises some level of control over the bacteria that inhabit its digestive tract.
References
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Book

MacClade: Analysis of phylogeny and character evolution

TL;DR: MacClade is a computer program that provides theory and tools for the graphic and interactive analysis of molecular and morphological data, phylogeny, and character evolution, yet its ease of use allows beginning students to grasp phylogenetic principles in an interactive environment.
Journal ArticleDOI

Multiple sequence alignment with Clustal X

TL;DR: The Clustal series of programs as mentioned in this paper have been widely used for multiple alignment and for preparing phylogenetic trees, and the most popular of these programs is the Clusteral W 1.7.
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