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Facultative symbionts in aphids and the horizontal transfer of ecologically important traits.
- K. Oliver, P. Degnan, G. Burke, N. Moran
- Environmental Science, BiologyAnnual review of entomology
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.
Massive Genomic Decay in Serratia symbiotica, a Recently Evolved Symbiont of Aphids
The S. symbiotica genome provides a rare opportunity to study genome evolution in a recently derived heritable symbiont and exhibits several of the hallmarks of genome evolution observed in more ancient symbionts, including elevated rates of evolution and reduction in genome size.
Genome Sequence of the Pea Aphid Acyrthosiphon pisum
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.
Evolution and Diversity of Facultative Symbionts from the Aphid Subfamily Lachninae
- G. Burke, B. Normark, Colin Favret, N. Moran
- Biology, Environmental ScienceApplied and Environmental Microbiology
- 19 June 2009
In a phylogenetic analysis of Serratia symbionts from 51 lachnid hosts, it is found that diversity in symbiont morphology, distribution, and function is due to multiple independent origins of symbiosis from ancestors belonging toSerratia and possibly also to evolution within distinct symbionT clades.
Effects of facultative symbionts and heat stress on the metabolome of pea aphids
It is concluded that facultative symbionts can have substantial effects on host metabolic pools, and it is hypothesize that the protective effects of S. symbiotica may reflect the delivery of protective metabolites to aphid or Buchnera cells, after heat exposure.
Distribution, Expression, and Motif Variability of Ankyrin Domain Genes in Wolbachia pipientis
This work determined the distribution and expression of the different ANK genes found in the sequenced Wolbachia wMel genome in nine Wolbachian strains that induce different phenotypic effects in their hosts.
Systematic analysis of a wasp parasitism arsenal
It is shown that teratocytes express high levels of the antimicrobial peptide hymenoptaecin, which likely compensates for MdBV‐mediated immunosuppression, and the prevalence of duplications among genes encoding venom and teratocyte molecules is high.
The Encapsidated Genome of Microplitis demolitor Bracovirus Integrates into the Host Pseudoplusia includens
It is reported that all 15 genomic segments of the MdBV encapsidated genome exhibited long-term persistence in CiE1 cells, suggesting that the integration of each genomic segment into host cells occurs through a shared mechanism.
Widespread Genome Reorganization of an Obligate Virus Mutualist
- G. Burke, Kimberly K. O. Walden, J. Whitfield, H. Robertson, M. Strand
- BiologyPLoS genetics
- 1 September 2014
The genome of the wasp Microplitis demolitor is sequenced to characterize the proviral genome of M. demolitor bracovirus and indicates that genome dispersal is a key feature in the evolution of brcoviruses into mutualists.
Mutualistic Polydnaviruses Share Essential Replication Gene Functions with Pathogenic Ancestors
It is reported that virions from Microplitis demolitor bracovirus (MdBV) contain multiple baculovirus- like and nudivirus-like conserved gene products and RNA interference effectively and specifically knocks down MdBV gene expression, providing the first experimental insights into the function of BV genes in virions.