ArticleProceedings. Biological sciences2000
Decay of mutualistic potential in aphid endosymbionts through silencing of biosynthetic loci: Buchnera of Diuraphis.
Article in Proceedings. Biological sciences, 2000. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 8 papers.
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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
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Who cites it
8 citing papers in PubMed, 36 citations in OpenAlex.
- Facultative symbionts are potential agents of symbiont-mediated RNAi in aphids.Frontiers in microbiology · 2022Review
- Nutrient provisioning facilitates homeostasis between tsetse fly (Diptera: Glossinidae) symbionts.Proceedings. Biological sciences · 2010Article
- Review
- Genome-wide functional divergence after the symbiosis of proteobacteria with insects unraveled through a novel computational approach.PLoS computational biology · 2009Article
- Interactions of chaperonin with a weakly active anthranilate synthase from the aphid endosymbiont Buchnera aphidicola.Microbial ecology · 2008Article
- Metabolic interdependence of obligate intracellular bacteria and their insect hosts.Microbiology and molecular biology reviews : MMBR · 2004Review
- A genomic perspective on nutrient provisioning by bacterial symbionts of insects.Proceedings of the National Academy of Sciences of the United States of America · 2003Article
- The process of genome shrinkage in the obligate symbiont Buchnera aphidicola.Genome biology · 2001Article
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Authors and funding
2 authors at 1 institution in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Buchnera, the primary bacterial endosymbiont of aphids, is known to provision essential amino acids lacking in the hosts' diet of plant sap. The recent discovery of silenced copies of genes for tryptophan biosynthesis (trpEG) in certain Buchnera lineages suggests a decay in symbiotic functions in some aphid species. However, neither the distribution of pseudogenes among lineages nor the impact of this gene silencing on amino-acid availability in hosts has been assessed. In Buchnera of the aphid Diuraphis noxia, tandem repeats of these pseudogenes have persisted in diverse lineages, and thpEG pseudogenes have originated at least twice within this aphid genus. Measures of amino-acid concentrations in Diuraphis species have shown that the presence of the pseudogene is associated with a decreased availability of tryptophan, indicating that gene silencing decreases nutrient provisioning by symbionts. In Buchnera of Diuraphis, rates of nonsynonymous substitutions are elevated in functional trpE copies, supporting the hypothesis that pseudogene origin and persistence reflect a reduced selection for symbiont biosynthetic contributions. The parallel evolution of trpEG pseudogenes in Buchnera of Diuraphis and certain other aphid hosts suggests that either selection at the host level is not effective or that fitness in these aphids is not limited by tryptophan availability.
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