Journal ArticleDOI
Nutritional Interactions in Insect-Microbial Symbioses: Aphids and Their Symbiotic Bacteria Buchnera
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TLDR
It is argued that strong parallels may exist between the nutritional interactions (including the underlying mechanisms) in the aphid-Buchnera association and other insect symbioses with intracellular microorganisms.Abstract:
Most aphids possess intracellular bacteria of the genus Buchnera. The bacteria are transmitted vertically via the aphid ovary, and the association is obligate for both partners: Bacteria-free aphids grow poorly and produce few or no offspring, and Buchnera are both unknown apart from aphids and apparently unculturable. The symbiosis has a nutritional basis. Specifically, bacterial provisioning of essential amino acids has been demonstrated. Nitrogen recycling, however, is not quantitatively important to the nutrition of aphid species studied, and there is strong evidence against bacterial involvement in the lipid and sterol nutrition of aphids. Buchnera have been implicated in various non-nutritional functions. Of these, just one has strong experimental support: promotion of aphid transmission of circulative viruses. It is argued that strong parallels may exist between the nutritional interactions (including the underlying mechanisms) in the aphid-Buchnera association and other insect symbioses with intracellular microorganisms.read more
Citations
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Journal ArticleDOI
Metabolic and symbiotic interactions in amino acid pools of the pea aphid, Acyrthosiphon pisum, parasitized by the braconid Aphidius ervi.
Yvan Rahbé,Maria Cristina Digilio,Gérard Febvay,J. Guillaud,Paolo Fanti,Francesco Pennacchio +5 more
TL;DR: Tyrosine accumulation was the most prominent parasitoid-induced alteration, with a fourfold increase over control levels registered on day 6, and the amino acid biosynthetic capacity of Buchnera was unaltered, or even enhanced for the phenolic pool, and contributed greatly to the definition and maintainance of host free amino acid pools.
Journal ArticleDOI
The cellular immune response of the pea aphid to foreign intrusion and symbiotic challenge.
Antonin Schmitz,Antonin Schmitz,Antonin Schmitz,Caroline Anselme,Caroline Anselme,Caroline Anselme,Marc Ravallec,Christian Rebuf,Christian Rebuf,Christian Rebuf,Jean-Christophe Simon,Jean-Luc Gatti,Jean-Luc Gatti,Jean-Luc Gatti,Marylène Poirié,Marylène Poirié,Marylène Poirié +16 more
TL;DR: A strong interaction between aphid symbionts and immune cells, depending upon the symbiont is demonstrated, highlighting the link between immunity and symbiosis.
Journal ArticleDOI
Pyrosequencing the Bemisia tabaci Transcriptome Reveals a Highly Diverse Bacterial Community and a Robust System for Insecticide Resistance
Wen Xie,Qingshu Meng,Qingjun Wu,Shaoli Wang,Xin Yang,Nina Yang,Rumei Li,Xiaoguo Jiao,Huipeng Pan,Baiming Liu,Qi Su,Baoyun Xu,Songnian Hu,Xuguo Zhou,Youjun Zhang +14 more
TL;DR: This transcriptome/metatranscriptome analysis sheds light on the molecular understanding of symbiosis and insecticide resistance in an agriculturally important phloem-feeding insect pest, and lays the foundation for future functional genomics research of the B. tabaci complex.
Journal ArticleDOI
Mechanisms of symbiont-conferred protection against natural enemies: an ecological and evolutionary framework.
TL;DR: Different mechanisms of symbiont-protection can be mediated through exploitation of limiting resources, and through activation of host immune mechanisms that then suppress natural enemies, and their potential impact on the evolution of host physiological processes are discussed.
References
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Journal ArticleDOI
A molecular clock in endosymbiotic bacteria is calibrated using the insect hosts
TL;DR: Rates calibrated using dates inferred from fossil aphids imply that Asian and American species of the aphid tribe Melaphidina diverged by the early Eocene; this result confirms an earlier hypothesis based on biogeographic evidence.
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Genetics, Physiology, and Evolutionary Relationships of the Genus Buchnera: Intracellular Symbionts of Aphids
TL;DR: Genetic and physiological studies indicate that Buchnera can synthesize methionine, cysteine, and tryptophan and supply these amino acids to the aphid host and involve plasmid-amplification of the gene coding for anthranilate synthase, the first enzyme of the tryptophile biosynthetic pathway.
Journal ArticleDOI
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