Common trends in mutualism revealed by model associations between invertebrates and bacteria: Table 1

Chaston, John M.; Goodrich-Blair, Heidi

doi:10.1111/j.1574-6976.2009.00193.x

Cited by 98 publications

(102 citation statements)

References 201 publications

(298 reference statements)

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“…The egg mucus interface probably facilitated attraction, accumulation and host recognition of epibionts for horizontal transmission. This epibiont transmission pathway is in adequacy with the large colonization of the MAR by R. exoculata because horizontal transmission is supposed to promote dispersal as compared with vertical transmission (Chaston and Goodrich-Blair, 2010). In terms of evolution, it was suggested that episymbiosis represents a more primitive stage than endosymbiosis (Dubilier et al, 2008).…”

Section: Epibiont Diversity and Acquisitionmentioning

confidence: 99%

Acquisition of epibiotic bacteria along the life cycle of the hydrothermal shrimp Rimicaris exoculata

et al. 2011

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The caridean shrimp Rimicaris exoculata dominates the fauna at several Mid-Atlantic Ridge hydrothermal vent sites. This shrimp has an enlarged gill chamber, harboring a dense ectosymbiotic community of chemoautotrophic bacteria associated with mineral oxide deposits. Until now, their acquisition is not fully understood. At three hydrothermal vent sites, we analyzed the epibionts diversity at different moult stages and also in the first stages of the shrimp life (eggs, hatched eggs (with larvae) and juveniles). Hatched eggs associated with young larvae were collected for the first time directly from gravid females at the Logachev vent site during the Serpentine cruise. An approach using 16S rRNA clone libraries, scanning and transmission electron microscopy, and fluorescent in situ hybridization was used. Molecular results and microscope observations indicated a switch in the composition of the bacterial community between early R. exoculata life cycle stage (egg libraries dominated by the Gammaproteobacteria) and later stages (juvenile/adult libraries dominated by the Epsilonproteobacteria). We hypothesized that the epibiotic phylotype composition could vary according to the life stage of the shrimp. Our results confirmed the occurrence of a symbiosis with Gammaproteobacteria and Epsilonproteobacteria, but more complex than previously assumed. We revealed the presence of active type-I methanotrophic bacteria colonizing the cephalothorax of shrimps from the Rainbow site. They were also present on the eggs from the Logachev site. This could be the first 'epibiotic' association between methanotrophic bacteria and hydrothermal vent crustacean. We discuss possible transmission pathways for epibionts linked to the shrimp life cycle.

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Section: Epibiont Diversity and Acquisitionmentioning

confidence: 99%

Acquisition of epibiotic bacteria along the life cycle of the hydrothermal shrimp Rimicaris exoculata

et al. 2011

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“…1A). The importance of chitin in the chemical dialogue between squid and vibrio is reminiscent of the contribution of host glycans and structural polysaccharides to other host-microbe interactions (9). For example, (i) the catabolism of exoskeleton-derived chitin by Vibrio cholerae enhances transmission from an invertebrate vector to a susceptible host (25), (ii) pectin catabolism by the plant pathogen Xylella fastidiosa promotes transmission to leafhopper vectors (26), and (iii) foraging of mammalian mucin-derived glycans, such as fucose and sialic acid, forms a nutritional scaffold for the gut microbiota (27)(28)(29).…”

Section: Significancementioning

confidence: 99%

“…First, the provision of nutrients such as host-derived glycans contributes to the microbial community structure and is a source of microbederived metabolites such as short-chained fatty acids (SCFA) that promote the maturation of local and systemic immune functions (6)(7)(8)(9). Second, the nutritional and environmental changes that mark the developmental trajectory of an organism from its juvenile to adult form are accompanied by distinct shifts in both the composition and functions of the maturing host's microbiota (10,11).…”

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confidence: 99%

The chemistry of negotiation: Rhythmic, glycan-driven acidification in a symbiotic conversation

Schwartzman

Koch

Heath‐Heckman

et al. 2014

Proc. Natl. Acad. Sci. U.S.A.

113

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Glycans have emerged as critical determinants of immune maturation, microbial nutrition, and host health in diverse symbioses. In this study, we asked how cyclic delivery of a single host-derived glycan contributes to the dynamic stability of the mutualism between the squid Euprymna scolopes and its specific, bioluminescent symbiont, Vibrio fischeri. V. fischeri colonizes the crypts of a host organ that is used for behavioral light production. E. scolopes synthesizes the polymeric glycan chitin in macrophage-like immune cells called hemocytes. We show here that, just before dusk, hemocytes migrate from the vasculature into the symbiotic crypts, where they lyse and release particulate chitin, a behavior that is established only in the mature symbiosis. Diel transcriptional rhythms in both partners further indicate that the chitin is provided and metabolized only at night. A V. fischeri mutant defective in chitin catabolism was able to maintain a normal symbiont population level, but only until the symbiotic organ reached maturity (∼4 wk after colonization); this result provided a direct link between chitin utilization and symbiont persistence. Finally, catabolism of chitin by the symbionts was also specifically required for a periodic acidification of the adult crypts each night. This acidification, which increases the level of oxygen available to the symbionts, enhances their capacity to produce bioluminescence at night. We propose that other animal hosts may similarly regulate the activities of epithelium-associated microbial communities through the strategic provision of specific nutrients, whose catabolism modulates conditions like pH or anoxia in their symbionts' habitat.symbiosis | squid-vibrio | metabolism | chitin

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“…For instance, co-evolution or codivergence of bacteria and their hosts has been extensively studied in vertically transmitted associations, and can involve events like gene sharing and genome reduction within the microbial partner(s) (Kikuchi et al, 2009;Moran and Bennett, 2014). Similarly, horizontally transmitted symbioses of plants and invertebrates have offered the opportunity to examine the evolution of species specificity, revealing evidence for strategies such as congruent evolution and partner choice (Chaston and Goodrich-Blair, 2010;Sudakaran et al, 2015). In the symbiosis between the squid Euprymna scolopes and the luminous bacterium Vibrio fischeri, as in other environmentally acquired, non-obligatory symbionts, one can experimentally expose an aposymbiotic host to genetically distinct V. fischeri strains, either singly or in combination, and monitor the establishment and dynamics of the resulting symbiont population.…”

Section: Introductionmentioning

confidence: 99%

A genomic comparison of 13 symbiotic Vibrio fischeri isolates from the perspective of their host source and colonization behavior

et al. 2016

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Newly hatched Euprymna scolopes squid obtain their specific light-organ symbionts from an array of Vibrio (Allivibrio) fischeri strains present in their environment. Two genetically distinct populations of this squid species have been identified, one in Kaneohe Bay (KB), and another in Maunaloa Bay (MB), Oahu. We asked whether symbionts isolated from squid in each of these populations outcompete isolates from the other population in mixed-infection experiments. No relationship was found between a strain's host source (KB or MB) and its ability to competitively colonize KB or MB juveniles in a mixed inoculum. Instead, two colonization behaviors were identified among the 11 KB and MB strains tested: a 'dominant' outcome, in which one strain outcompetes the other for colonization, and a 'sharing' outcome, in which two strains co-colonize the squid. A genome-level comparison of these and other V. fischeri strains suggested that the core genomic structure of this species is both syntenous and highly conserved over time and geographical distance. We also identified~250 Kb of sequence, encoding 194 dispersed orfs, that was specific to those strains that expressed the dominant colonization behavior. Taken together, the results indicate a link between the genome content of V. fischeri strains and their colonization behavior when initiating a light-organ symbiosis.

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Common trends in mutualism revealed by model associations between invertebrates and bacteria: Table 1

Cited by 98 publications

References 201 publications

Acquisition of epibiotic bacteria along the life cycle of the hydrothermal shrimp Rimicaris exoculata

Acquisition of epibiotic bacteria along the life cycle of the hydrothermal shrimp Rimicaris exoculata

The chemistry of negotiation: Rhythmic, glycan-driven acidification in a symbiotic conversation

A genomic comparison of 13 symbiotic Vibrio fischeri isolates from the perspective of their host source and colonization behavior

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