Facultative bacterial symbionts in aphids confer resistance to parasitic wasps
Reads0
Chats0
TLDR
Investigation of aphids for vulnerability of the aphid host to a hymenopteran parasitoid, Aphidius ervi, shows that infection confers resistance to parasitoids attack by causing high mortality of developing Parasitoid larvae.Abstract:
Symbiotic relationships between animals and microorganisms are common in nature, yet the factors controlling the abundance and distributions of symbionts are mostly unknown. Aphids have an obligate association with the bacterium Buchnera aphidicola (the primary symbiont) that has been shown to contribute directly to aphid fitness. In addition, aphids sometimes harbor other vertically transmitted bacteria (secondary symbionts), for which few benefits of infection have been previously documented. We carried out experiments to determine the consequences of these facultative symbioses in Acyrthosiphon pisum (the pea aphid) for vulnerability of the aphid host to a hymenopteran parasitoid, Aphidius ervi, a major natural enemy in field populations. Our results show that, in a controlled genetic background, infection confers resistance to parasitoid attack by causing high mortality of developing parasitoid larvae. Compared with uninfected controls, experimentally infected aphids were as likely to be attacked by ovipositing parasitoids but less likely to support parasitoid development. This strong interaction between a symbiotic bacterium and a host natural enemy provides a mechanism for the persistence and spread of symbiotic bacteria.read more
Citations
More filters
Journal ArticleDOI
Animals in a bacterial world, a new imperative for the life sciences
Margaret J. McFall-Ngai,Michael G. Hadfield,Thomas C. G. Bosch,Hannah V. Carey,Tomislav Domazet-Lošo,Angela E. Douglas,Nicole Dubilier,Gérard Eberl,Tadashi Fukami,Scott F. Gilbert,Ute Hentschel,Nicole King,Staffan Kjelleberg,Andrew H. Knoll,Natacha Kremer,Sarkis K. Mazmanian,Jessica L. Metcalf,Kenneth H. Nealson,Naomi E. Pierce,John F. Rawls,Ann H. Reid,Edward G. Ruby,Mary E. Rumpho,Jon G. Sanders,Diethard Tautz,Jennifer J. Wernegreen +25 more
TL;DR: Recent technological and intellectual advances that have changed thinking about five questions about how have bacteria facilitated the origin and evolution of animals; how do animals and bacteria affect each other’s genomes; how does normal animal development depend on bacterial partners; and how is homeostasis maintained between animals and their symbionts are highlighted.
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
Fungal endophytes limit pathogen damage in a tropical tree
A. Elizabeth Arnold,Luis C. Mejía,Damond Kyllo,Enith I. Rojas,Zuleyka Maynard,Nancy Robbins,Edward Allen Herre +6 more
TL;DR: It is shown that inoculation of endophyte-free leaves with endophytes isolated frequently from naturally infected, asymptomatic hosts significantly decreases both leaf necrosis and leaf mortality when T. cacao seedlings are challenged with a major pathogen.
Journal ArticleDOI
The bacterial symbiont Wolbachia induces resistance to RNA viral infections in Drosophila melanogaster.
TL;DR: It is reported that a bacterial infection renders D. melanogaster more resistant to Drosophila C virus, reducing the load of viruses in infected flies and identifying these resistance-inducing bacteria as Wolbachia.
Journal ArticleDOI
Biology of bacteriocyte-associated endosymbionts of plant sap-sucking insects
TL;DR: Psyllids, whiteflies, aphids, and mealybugs are members of the suborder Sternorrhyncha and share a common property, namely the utilization of plant sap as their food source, and the different properties of the genomes and fragments of the genome suggest that there are different constraints on the permissible evolutionary changes.
References
More filters
Journal ArticleDOI
Nutritional Interactions in Insect-Microbial Symbioses: Aphids and Their Symbiotic Bacteria Buchnera
TL;DR: 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.
Journal ArticleDOI
Coevolution of mutualism between ants and acacias in central america
TL;DR: The coevolution of one of the more thoroughly studied mutualistic systems in the New World tropics: the interdependency between the swollen-thorn acacias and their ant inhabitants is discussed.
Journal ArticleDOI
Long PCR improves Wolbachia DNA amplification: wsp sequences found in 76% of sixty-three arthropod species
TL;DR: Long PCR, which uses two enzymes (Taq and Pwo), consistently amplified Wolbachia DNA and a sensitivity analysis indicated that Long PCR was approximately six orders of magnitude more sensitive than Standard PCR in amplifying plasmid DNA spiked into insect genomic DNA.
Journal ArticleDOI
Wolbachia infection frequencies in insects: evidence of a global equilibrium?
John H. Werren,Donald M. Windsor +1 more
TL;DR: It is reported that 19.3% of a sample of temperate North American insects are infected with Wolbachia, a frequency strikingly similar to frequencies found in two other studies in widely separated locales, which may indicate a widespread equilibrium of Wolbachian infection frequencies in insects whose maintenance remains to be explained.