Journal ArticleDOI
Facultative Symbionts in Aphids and the Horizontal Transfer of Ecologically Important Traits
TLDR
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.Abstract:
Aphids engage in symbiotic associations with a diverse assemblage of heritable bacteria. In addition to their obligate nutrient-provisioning symbiont, Buchnera aphidicola, aphids may also carry one or more facultative symbionts. Unlike obligate symbionts, facultative symbionts are not generally required for survival or reproduction and can invade novel hosts, based on both phylogenetic analyses and transfection experiments. Facultative symbionts are mutualistic in the context of various ecological interactions. Experiments on pea aphids (Acyrthosiphon pisum) have demonstrated that facultative symbionts protect against entomopathogenic fungi and parasitoid wasps, ameliorate the detrimental effects of heat, and influence host plant suitability. The protective symbiont, Hamiltonella defensa, has a dynamic genome, exhibiting evidence of recombination, phage-mediated gene uptake, and horizontal gene transfer and containing virulence and toxin-encoding genes. Although transmitted maternally with high fidelity, facultative symbionts occasionally move horizontally within and between species, resulting in the instantaneous acquisition of ecologically important traits, such as parasitoid defense.read more
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Dissertation
Développement et applications d'outils d'analyse métagénomique des communautés microbiennes associées aux insectes
TL;DR: MindTheGap a realise l’assemblage du symbiote obligatoire \textit{Buchnera} en un seul contig, et a permis d’identifier differents variants structuraux du bacteriophage APSE.
Journal ArticleDOI
Host plant adaptability and proteomic differences of diverse Rhopalosiphum maidis (Fitch) lineages.
TL;DR: In this article, the authors investigated the survival and reproduction of six Rhopalosiphum maidis populations (i.e., LF, HF, GZ, DY, BJ, and MS) via direct observation method in the laboratory on 10 and 50 cm high maize seedlings, and 10 cm high barley seedlings.
Journal ArticleDOI
Variation in density, immune gene suppression, and coinfection outcomes among strains of the aphid endosymbiont <i>Regiella insecticola</i>
TL;DR: In this paper , different strains of Regiella insecticola, a facultative symbiont of aphids, establish in pea aphids at drastically different densities, and the variation in density is correlated with the expression levels of two key insect immune system genes (phenoloxidase and hemocytin), with the suppression of immune gene expression correlating with higher regiella density.
Journal ArticleDOI
Spatial distribution and community structure of microbiota associated with cowpea aphid (Aphis craccivora Koch)
Madhusudan M. Pawar,Binoy Shivanna,M. K. Prasannakumar,P. Parivallal,K.G. Suresh,N. H. Meenakshi +5 more
TL;DR: Aphid populations were collected on cowpea, dolichos, redgram, and black gram from Belagavi and Udupi locations in India and the samples were shotgun sequenced using the Illumina NovaSeq 6000 system to understand the spatial distribution and community structure of microbiota associated with aphids as mentioned in this paper .
Journal ArticleDOI
Multi-approach comparative study of the two most prevalent genotypes of pea aphid Acyrthosiphon pisum (Hemiptera: Aphididae) in Chile
Laurent Serteyn,Emilie Bosquée,Anaïs Delatour,María E Rubio-Meléndez,Karla V. Vega‐Muñoz,Claudio C. Ramírez,Frédéric Francis +6 more
TL;DR: Variation in the ability to colonize, feeding behavior and the putative involvement of differentially regulated proteins between Ap1 and Ap2 are discussed in relation to their respective endosymbiotic composition, nutritional lifestyle and consequences on their “superclone” status.
References
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Book
Parasitoids: Behavioral and Evolutionary Ecology
TL;DR: This book synthesizes the work of both schools of parasitoid biology and asks how a consideration of evolutionary biology can help to understand the behavior, ecology, and diversity of the approximately one to two million species of Parasitoids found on earth.
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.
Book
Evolution of sex determining mechanisms
TL;DR: Books, as a source that may involve the facts, opinion, literature, religion, and many others are the great friends to join with.
Journal ArticleDOI
Type III Secretion Machines: Bacterial Devices for Protein Delivery into Host Cells
Jorge E. Galán,Alan Collmer +1 more
TL;DR: Several Gram-negative pathogenic bacteria have evolved a complex protein secretion system termed type III to deliver bacterial effector proteins into host cells that then modulate host cellular functions.