Diversity begets diversity: do parasites promote variation in protective symbionts?

Flórez, 2015, Defensive symbioses of animals with prokaryotic and eukaryotic microorganisms, Nat Prod Rep, 32, 904, 10.1039/C5NP00010F

Brownlie, 2009, Symbiont-mediated protection in insect hosts, Trends Microbiol, 17, 348, 10.1016/j.tim.2009.05.005

Oliver, 2014, Defensive symbiosis in the real world – advancing ecological studies of heritable, protective bacteria in aphids and beyond, Funct Ecol, 28, 341, 10.1111/1365-2435.12133

Xie, 2010, Spiroplasma bacteria enhance survival of Drosophila hydei attacked by the parasitic wasp Leptopilina heterotoma, PLoS ONE, 5, e12149, 10.1371/journal.pone.0012149

Xie, 2015, Rapid spread of the defensive endosymbiont Spiroplasma in Drosophila hydei under high parasitoid wasp pressure, FEMS Microbiol Ecol, 91, 1, 10.1093/femsec/fiu017

Jaenike, 2010, Adaptation via symbiosis: recent spread of a Drosophila defensive symbiont, Science, 329, 212, 10.1126/science.1188235

Hedges, 2008, Wolbachia and virus protection in insects, Science, 322, 702, 10.1126/science.1162418

Osborne, 2009, Variation in antiviral protection mediated by different Wolbachia strains in Drosophila simulans, PLoS Pathog, 5, e1000656, 10.1371/journal.ppat.1000656

Teixeira, 2008, The bacterial symbiont Wolbachia induces resistance to RNA viral infections in Drosophila melanogaster, PLoS Biol, 6, 2753, 10.1371/journal.pbio.1000002

Kaltenpoth, 2005, Symbiotic bacteria protect wasp larvae from fungal infestation, Curr Biol, 15, 475, 10.1016/j.cub.2004.12.084

Flórez, 2017, Antibiotic-producing symbionts dynamically transition between plant pathogenicity and insect-defensive mutualism, Nat Commun, 8, 15172, 10.1038/ncomms15172

Henry, 2015, Insect life history and the evolution of bacterial mutualism, Ecol Lett, 18, 516, 10.1111/ele.12425

McLean, 2016, Insect symbionts in food webs, Philos Trans R Soc B, 371, 20150325, 10.1098/rstb.2015.0325

Zytynska, 2016, The natural occurrence of secondary bacterial symbionts in aphids, Ecol Entomol, 41, 13, 10.1111/een.12281

Chiel, 2007, Biotype-dependent secondary symbiont communities in sympatric populations of Bemisia tabaci, Bull Entomol Res, 97, 407, 10.1017/S0007485307005159

Zhu, 2018, Incidence of facultative bacterial endosymbionts in spider mites associated with local environment and host plant, Appl Environ Microbiol, 84, 10.1128/AEM.02546-17

Oliver, 2010, Facultative symbionts in aphids and the horizontal transfer of ecologically important traits, Annu Rev Entomol, 55, 247, 10.1146/annurev-ento-112408-085305

Vorburger, 2018, The role of defensive symbionts in host-parasite coevolution, Biol Rev, 10.1111/brv.12417

Lenhart, 2017, A defensive endosymbiont fails to protect aphids against the parasitoid community present in the field, Ecol Entomol, 42, 680, 10.1111/een.12419

Vorburger, 2010, A strain of the bacterial symbiont Regiella insecticola protects aphids against parasitoids, Biol Lett, 6, 109, 10.1098/rsbl.2009.0642

Cayetano, 2015, Symbiont-conferred protection against Hymenopteran parasitoids in aphids: how general is it?, Ecol Entomol, 40, 85, 10.1111/een.12161

Cayetano, 2015, Cheaper is not always worse: strongly protective isolates of a defensive symbiont are less costly to the aphid host, Proc R Soc B, 282, 1, 10.1098/rspb.2014.2333

Rouchet, 2012, Strong specificity in the interaction between parasitoids and symbiont-protected hosts, J Evol Biol, 25, 2369, 10.1111/j.1420-9101.2012.02608.x

Parker, 2017, Genotype specificity among hosts, pathogens, and beneficial microbes influences the strength of symbiont-mediated protection, Evolution, 71, 1222, 10.1111/evo.13216

Schmid, 2012, Development, specificity and sublethal effects of symbiont-conferred resistance to parasitoids in aphids, Funct Ecol, 26, 207, 10.1111/j.1365-2435.2011.01904.x

McLean, 2018, Consequences of symbiont co-infections for insect host phenotypes, J Anim Ecol, 87, 478, 10.1111/1365-2656.12705

Leclair, 2017, Consequences of coinfection with protective symbionts on the host phenotype and symbiont titres in the pea aphid system, Insect Sci, 24, 798, 10.1111/1744-7917.12380

Oliver, 2006, Costs and benefits of a superinfection of facultative symbionts in aphids, Proc R Soc B Biol Sci, 273, 1273, 10.1098/rspb.2005.3436

Guay, 2009, Impact of environmental stress on aphid clonal resistance to parasitoids: role of Hamiltonella defensa bacterial symbiosis in association with a new facultative symbiont of the pea aphid, J Insect Physiol, 55, 919, 10.1016/j.jinsphys.2009.06.006

Doremus, 2018, Breakdown of a defensive symbiosis, but not endogenous defences, at elevated temperatures, Mol Ecol, 27, 2138, 10.1111/mec.14399

Rock, 2018, Context-dependent vertical transmission shapes strong endosymbiont community structure in the pea aphid, Acyrthosiphon pisum, Mol Ecol, 27, 2039, 10.1111/mec.14449

Moran, 2006, Sexual acquisition of beneficial symbionts in aphids, Proc Natl Acad Sci U S A, 103, 12803, 10.1073/pnas.0605772103

Heyworth, 2015, A facultative endosymbiont in aphids can provide diverse ecological benefits, J Evol Biol, 28, 1753, 10.1111/jeb.12705

Martinez, 2014, Aphid-encoded variability in susceptibility to a parasitoid, BMC Evol Biol, 14, 1, 10.1186/1471-2148-14-127

Brandt, 2017, Culture of an aphid heritable symbiont demonstrates its direct role in defence against parasitoids, Proc R Soc B Biol Sci, 10.1098/rspb.2017.1925

Weldon, 2012, Phage loss and the breakdown of a defensive symbiosis in aphids, Proc R Soc B Biol Sci, 280, 20122103, 10.1098/rspb.2012.2103

Oliver, 2009, Bacteriophages encode factors required for protection in a symbiotic mutualism, Science, 325, 992, 10.1126/science.1174463

Apanius, 1997, The nature of selection on the major histocompatibility complex, Crit Rev Immunol, 17, 179, 10.1615/CritRevImmunol.v17.i2.40

Piertney, 2006, The evolutionary ecology of the major histocompatibility complex, Heredity, 96, 7, 10.1038/sj.hdy.6800724

Jaenike, 2012, Population genetics of beneficial heritable symbionts, Trends Ecol Evol, 27, 226, 10.1016/j.tree.2011.10.005

Milinski, 2006, The major histocompatibility complex, sexual selection, and mate choice, Annu Rev Ecol Evol Syst, 37, 159, 10.1146/annurev.ecolsys.37.091305.110242

Smith, 2015, Patterns, causes and consequences of defensive microbiome dynamics across multiple scales, Mol Ecol, 24, 1135, 10.1111/mec.13095

Kwiatkowski, 2012, On genetic specificity in symbiont-mediated host-parasite coevolution, PLoS Comput Biol, 8, e1002633, 10.1371/journal.pcbi.1002633

Seppälä, 2016, Do coinfections maintain genetic variation in parasites?, Trends Parasitol, 32, 930, 10.1016/j.pt.2016.08.010

Oliver, 2008, Population dynamics of defensive symbionts in aphids, Proc R Soc B Biol Sci, 275, 293, 10.1098/rspb.2007.1192

Zytynska, 2016, Secondary bacterial symbiont community in aphids responds to plant diversity, Oecologia, 180, 735, 10.1007/s00442-015-3488-y

Petermann, 2010, Effect of plant species loss on aphid-parasitoid communities, J Anim Ecol, 79, 709, 10.1111/j.1365-2656.2010.01674.x

Hrček, 2016, Symbionts modify interactions between insects and natural enemies in the field, J Anim Ecol, 85, 1605, 10.1111/1365-2656.12586

Kraft, 2017, Aphid symbionts and endogenous resistance traits mediate competition between rival parasitoids, PLOS ONE, 12, 1, 10.1371/journal.pone.0180729

McLean, 2017, The outcome of competition between two parasitoid species is influenced by a facultative symbiont of their aphid host, Funct Ecol, 31, 927, 10.1111/1365-2435.12781

Rothacher, 2016, Bacterial endosymbionts protect aphids in the field and alter parasitoid community composition, Ecology, 97, 1712, 10.1890/15-2022.1

Glutton-Brock, 1991, Sexual selection and the potential reproductive rates of males and females, Nature, 351, 58, 10.1038/351058a0

Bonduriansky, 2001, The evolution of male mate choice in insects: a synthesis of ideas and evidence, Biol Rev Camb Philos Soc, 76, 305, 10.1017/S1464793101005693

Matzaraki, 2017, The MHC locus and genetic susceptibility to autoimmune and infectious diseases, Genome Biol, 18, 76, 10.1186/s13059-017-1207-1

Bernatchez, 2003, MHC studies in nonmodel vertebrates: what have we learned about natural selection in 15 years?, J Evol Biol, 16, 363, 10.1046/j.1420-9101.2003.00531.x

Eizaguirre, 2010, Major histocompatability complex polymorphism: dynamics and consequences of parasite-mediated local adaptation in fishes, J Fish Biol, 77, 2023, 10.1111/j.1095-8649.2010.02819.x

Wegner, 2003, Multiple parasites are driving major histocompatibility complex polymorphism in the wild, J Evol Biol, 16, 224, 10.1046/j.1420-9101.2003.00519.x

Goüy De Bellocq, 2008, Coevolutionary relationship between helminth diversity and MHC class II polymorphism in rodents, J Evol Biol, 21, 1144, 10.1111/j.1420-9101.2008.01538.x

Bordes, 2011, The impact of multiple infections on wild animal hosts: a review, Infect Ecol Epidemiol, 1, 7346, 10.3402/iee.v1i0.7346

Hansen, 2007, Frequency of secondary symbiont infection in an invasive psyllid relates to parasitism pressure on a geographic scale in California, Appl Environ Microbiol, 73, 7531, 10.1128/AEM.01672-07

Herzog, 2007, Strong parasitoid-mediated selection in experimental populations of aphids, Biol Lett, 3, 667, 10.1098/rsbl.2007.0362

Käch, 2018, Rapid evolution of symbiont-mediated resistance compromises biological control of aphids by parasitoids, Evol Appl, 11, 220, 10.1111/eva.12532

Sanders, 2016, Defensive insect symbiont leads to cascading extinctions and community collapse, Ecol Lett, 19, 789, 10.1111/ele.12616

Rouchet, 2014, Experimental evolution of parasitoid infectivity on symbiont-protected hosts leads to the emergence of genotype specificity, Evolution, 68, 1607, 10.1111/evo.12377

Dennis, 2017, Parasitoid gene expression changes after adaptation to symbiont-protected hosts, Evolution, 71, 2599, 10.1111/evo.13333

Dion, 2011, Rapid evolution of parasitoids when faced with the symbiont-mediated resistance of their hosts, J Evol Biol, 24, 741, 10.1111/j.1420-9101.2010.02207.x