Tory A. Hendry's research while affiliated with Cornell University and other places

Publications (11)

Article
Many insect species derive fitness benefits from associations with defensive microbial symbionts that confer protection against pathogens and parasites. These relationships are varied and diverse, but a number of studies highlight important trends. The effects of defensive symbionts can be context-dependent and influenced by variable selection impo...
Article
Aphids are diverse sap-sucking insects [1] that can be serious agricultural pests and vectors of plant disease [2]. Some species, including pea aphids (Acyrthosiphon pisum), are susceptible to infection by epiphytic bacteria that are commonly found on plant surfaces [3-5]. Pea aphids appear unable to recover from these infections, possibly because...
Article
Full-text available
Strains of the well-studied plant pathogen Pseudomonas syringae show large differences in their ability to colonize plants epiphytically and to inflict damage to hosts. Additionally, P. syringae can infect some sap-sucking insects and at least one P. syringae strain is highly virulent to insects, causing death to most individuals within as few as f...
Article
Full-text available
The luminous bacterial symbionts of anomalopid flashlight fish are thought to be obligately dependent on their hosts for growth and share several aspects of genome evolution with unrelated obligate symbionts, including genome reduction. However, in contrast to most obligate bacteria, anomalopid symbionts have an active environmental phase that may...
Article
Full-text available
Pea aphids, Acyrthosiphon pisum, have the potential to increase reproduction as a defence against pathogens, though how frequently this occurs or how infection with live pathogens influences this response is not well understood. Here we determine the minimum infective dose of an environmentally common bacterium and possible aphid pathogen, Pseudomo...
Article
Ecological constraints on independent breeding are recognised as major drivers of cooperative breeding across diverse lineages. How the prevalence and degree of cooperative breeding relates to ecological variation remains unresolved. Using a large data set of cooperative nesting in Polistes wasps we demonstrate that different aspects of cooperative...
Chapter
Pseudomonas syringae is well known as a model bacterial phytopathogen in the laboratory, environment, and the field. A focus on understanding mechanisms of virulence in planta has motivated extensive research into genetic, genomic, and evolutionary factors that influence disease. However, in recent years, appreciation has grown for the life cycle o...
Article
The luminous bacteria symbiotic with anomalopid flashlight fish are unusual compared to other luminous symbionts; they cannot be cultured outside the host and are thought to be obligately dependent on their hosts. The aims of this dissertation are to test if anomalopid symbionts are obligately dependent on hosts for growth and to compare the evolut...

Citations

... Facultative endosymbionts tend to manipulate host reproduction to their own benefit, or confer a conditional fitness advantage to hosts [e.g. tolerance to environmental stressors ; 7] or defense against natural enemies [reviewed in ref. 8]. ...
... O rganisms depend on avoidance behavior to translocate themselves to a more favorable environment [1][2][3][4][5] . In most cases, the ability to sense the outside environment is dependent on transmembrane proteins (TPs) triggering and amplifying downstream signaling pathways, including neuronal activity, that evoke a behavioral response. ...
... In addition, the article showed that the molecule pyoverdine synthesized by P. syringae emitted fluorescence in the visible range of aphid. This suggest that aphids could be using visual cues to avoid leaves epiphytically colonized by P. syringae which is particularly relevant considering that certain P. syringae strains can infect and kill different species of aphids [9][10][11]. This phenomenon adds a new and previously underrated layer of information since a tripartite interaction could be occurring between aphids, P. syringae, and plants. ...
... The two most speciose genera are Vibrio and Photobacterium. Bioluminescence has long been recognized in these two genera but has more recently been documented in Enterovibrio and Photodesmus [5,6]. Vibrionaceae members can exist as free-living bacterioplankton or engage in host-microbe interactions as pathogens, commensals, or mutualists [7]. ...
... The genome sequences resulting from these samples are technically metagenomic, however anomalopid symbionts are monoclonal within a host and show very little genetic polymorphism between hosts Hendry & Dunlap 2011). Previous work, including PCR amplification and sequencing of multiple loci from different hosts at one location (Hendry & Dunlap 2011) and comparisons of whole genome sequences from individuals across a wide geographic range substantiate this pattern (Hendry 2012). Pooled symbiont genome samples from the A. katoptron and P. blepharus individuals used in this study were found to have single nucleotide polymorphisms (SNPs) at a rate of approximately 0.21/kilobase and 0.55/kilobase respectively (supplementary table S1), making their genomic diversity similar to bacteria considered genetically monomorphic (Achtman 2008) (supplementary figure S1). ...
... Similarly, marine snails (Cerithidea californica) mature faster when invaded by deadly Trematoda parasites (Lafferty, 1993), and precocial breeding increases among young female Tasmanian devils (Sarcophilus harrisii) suffering from facial cancer that is fatal (Jones et al., 2008). Even more compelling evidence comes from experimental studies where animals exposed to high dosage of infection exhibited high mating behavior, whereas those exposed to lower dosages showed low mating and other slower LH manifestations (e.g., Copeland & Fedorka, 2012;Hendry et al., 2016;Marzal et al., 2008;Polak & Starmer, 1998). ...
... Cooperation can evolve as a consequence of climatic selective pressures. Associations between climate and sociality have been described broadly across aminal taxa, including birds (Jetz and Rubenstein 2011;Lin et al. 2019), mammals (Lukas and Clutton-Brock 2017;Firman et al. 2020), and insects (Brady et al. 2006;Kocher et al. 2014;Sheehan et al. 2015;Lukas and Clutton-Brock 2017;Groom and Rehan 2018;Lin et al. 2019). Comparative studies suggest that cooperation is more likely to occur in climates that are especially hot (Arnold and Owens 1999) or particularly cold (Heinze 1993;Heinze and Hölldobler 1994;Heinze and Rueppell 2014;Groom and Rehan 2018). ...