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Journal articles on the topic 'Host-Symbiont specificity'

Author: Grafiati
Published: 30 November 2024
Last updated: 19 July 2025

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1

MATTHEWS, ALIX E., THAN J. BOVES, ANDREW D. SWEET, et al. "Population genomics of avian feather mites with contrasting host specificities." Zoosymposia 22 (November 30, 2022): 47. http://dx.doi.org/10.11646/zoosymposia.22.1.17.

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Host specificity is a key element to our understanding of symbiont diversification and is driven by multiple macro- and microevolutionary processes. Broad scale (e.g., species-level) studies can uncover relevant processes such as cospeciation and host-switching that shape host-symbiont evolutionary histories.
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2

Rahat, M., and V. Reich. "Algal endosymbiosis in brown hydra: host/symbiont specificity." Journal of Cell Science 86, no. 1 (1986): 273–86. http://dx.doi.org/10.1242/jcs.86.1.273.

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Host/symbiont specificity has been investigated in non-symbiotic and aposymbiotic brown and green hydra infected with various free-living and symbiotic species and strains of Chlorella and Chlorococcum. Morphology and ultrastructure of the symbioses obtained have been compared. Aposymbiotic Swiss Hydra viridis and Japanese H. magnipapillata served as controls. In two strains of H. attenuata stable hereditary symbioses were obtained with Chlorococcum isolated from H. magnipapillata. In one strain of H. vulgaris, in H. oligactis and in aposymbiotic H. viridis chlorococci persisted for more than
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3

Mandel, Mark J. "Models and approaches to dissect host–symbiont specificity." Trends in Microbiology 18, no. 11 (2010): 504–11. http://dx.doi.org/10.1016/j.tim.2010.07.005.

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4

Itoh, Hideomi, Seonghan Jang, Kazutaka Takeshita, et al. "Host–symbiont specificity determined by microbe–microbe competition in an insect gut." Proceedings of the National Academy of Sciences 116, no. 45 (2019): 22673–82. http://dx.doi.org/10.1073/pnas.1912397116.

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Despite the omnipresence of specific host–symbiont associations with acquisition of the microbial symbiont from the environment, little is known about how the specificity of the interaction evolved and is maintained. The bean bug Riptortus pedestris acquires a specific bacterial symbiont of the genus Burkholderia from environmental soil and harbors it in midgut crypts. The genus Burkholderia consists of over 100 species, showing ecologically diverse lifestyles, and including serious human pathogens, plant pathogens, and nodule-forming plant mutualists, as well as insect mutualists. Through inf
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5

Osvatic, Jay T., Laetitia G. E. Wilkins, Lukas Leibrecht, et al. "Global biogeography of chemosynthetic symbionts reveals both localized and globally distributed symbiont groups." Proceedings of the National Academy of Sciences 118, no. 29 (2021): e2104378118. http://dx.doi.org/10.1073/pnas.2104378118.

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In the ocean, most hosts acquire their symbionts from the environment. Due to the immense spatial scales involved, our understanding of the biogeography of hosts and symbionts in marine systems is patchy, although this knowledge is essential for understanding fundamental aspects of symbiosis such as host–symbiont specificity and evolution. Lucinidae is the most species-rich and widely distributed family of marine bivalves hosting autotrophic bacterial endosymbionts. Previous molecular surveys identified location-specific symbiont types that “promiscuously” form associations with multiple diver
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Kwiatkowski, Marek, Jan Engelstädter, and Christoph Vorburger. "On Genetic Specificity in Symbiont-Mediated Host-Parasite Coevolution." PLoS Computational Biology 8, no. 8 (2012): e1002633. http://dx.doi.org/10.1371/journal.pcbi.1002633.

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7

Garcia-Cuetos, Lydia, Xavier Pochon, and Jan Pawlowski. "Molecular Evidence for Host–Symbiont Specificity in Soritid Foraminifera." Protist 156, no. 4 (2005): 399–412. http://dx.doi.org/10.1016/j.protis.2005.08.003.

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8

Hudatwi, Mu'alimah, Diah permata Wijayanti, Ambariyanto Ambariyanto, and Michio Hidaka. "Fitness of Cassiopea polyps Inoculated with Different Types of Symbionts." ILMU KELAUTAN: Indonesian Journal of Marine Sciences 27, no. 2 (2022): 151–58. http://dx.doi.org/10.14710/ik.ijms.27.2.151-158.

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The specificity of the relationship between cnidarian hosts and symbiotic dinoflagellates (zooxanthellae) differs among host species. Some cnidarian hosts can establish symbiotic relationship with various types of zooxanthellae, while others exhibit high fidelity to specific symbiont type. It is not known how compatibility or specificity of the relationship is determined. We hypothesized that some cnidarian hosts select symbiont type that leads to highest fitness when the host is flexible with symbiont type and more than one types of symbionts are available. As a first step to study this possi
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9

Seah, Brandon K. B., Thomas Schwaha, Jean-Marie Volland, Bruno Huettel, Nicole Dubilier, and Harald R. Gruber-Vodicka. "Specificity in diversity: single origin of a widespread ciliate-bacteria symbiosis." Proceedings of the Royal Society B: Biological Sciences 284, no. 1858 (2017): 20170764. http://dx.doi.org/10.1098/rspb.2017.0764.

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Symbioses between eukaryotes and sulfur-oxidizing (thiotrophic) bacteria have convergently evolved multiple times. Although well described in at least eight classes of metazoan animals, almost nothing is known about the evolution of thiotrophic symbioses in microbial eukaryotes (protists). In this study, we characterized the symbioses between mouthless marine ciliates of the genus Kentrophoros , and their thiotrophic bacteria, using comparative sequence analysis and fluorescence in situ hybridization. Ciliate small-subunit rRNA sequences were obtained from 17 morphospecies collected in the Med
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10

Ashen, Jon B., and Lynda J. Goff. "Molecular and Ecological Evidence for Species Specificity and Coevolution in a Group of Marine Algal-Bacterial Symbioses." Applied and Environmental Microbiology 66, no. 7 (2000): 3024–30. http://dx.doi.org/10.1128/aem.66.7.3024-3030.2000.

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ABSTRACT The phylogenetic relationships of bacterial symbionts from three gall-bearing species in the marine red algal genusPrionitis (Rhodophyta) were inferred from 16S rDNA sequence analysis and compared to host phylogeny also inferred from sequence comparisons (nuclear ribosomal internal-transcribed-spacer region). Gall formation has been described previously on two species ofPrionitis, P. lanceolata (from central California) and P. decipiens (from Peru). This investigation reports gall formation on a third related host,Prionitis filiformis. Phylogenetic analyses based on sequence compariso
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11

Huguet, Valérie, Manolo Gouy, Philippe Normand, Jeff F. Zimpfer, and Maria P. Fernandez. "Molecular phylogeny of Myricaceae: a reexamination of host–symbiont specificity." Molecular Phylogenetics and Evolution 34, no. 3 (2005): 557–68. http://dx.doi.org/10.1016/j.ympev.2004.11.018.

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12

Matthews, Jennifer L., Camerron M. Crowder, Clinton A. Oakley, et al. "Optimal nutrient exchange and immune responses operate in partner specificity in the cnidarian-dinoflagellate symbiosis." Proceedings of the National Academy of Sciences 114, no. 50 (2017): 13194–99. http://dx.doi.org/10.1073/pnas.1710733114.

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The relationship between corals and dinoflagellates of the genusSymbiodiniumis fundamental to the functioning of coral ecosystems. It has been suggested that reef corals may adapt to climate change by changing their dominant symbiont type to a more thermally tolerant one, although the capacity for such a shift is potentially hindered by the compatibility of different host-symbiont pairings. Here we combined transcriptomic and metabolomic analyses to characterize the molecular, cellular, and physiological processes that underlie this compatibility, with a particular focus onSymbiodinium trenchi
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13

McCuaig, Bonita, France Liboiron, and Suzanne C. Dufour. "The bivalveThyasiracf.gouldihosts chemoautotrophic symbiont populations with strain level diversity." PeerJ 5 (July 26, 2017): e3597. http://dx.doi.org/10.7717/peerj.3597.

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Invertebrates from various marine habitats form nutritional symbioses with chemosynthetic bacteria. In chemosynthetic symbioses, both the mode of symbiont transmission and the site of bacterial housing can affect the composition of the symbiont population. Vertically transmitted symbionts, as well as those hosted intracellularly, are more likely to form clonal populations within their host. Conversely, symbiont populations that are environmentally acquired and extracellular may be more likely to be heterogeneous/mixed within host individuals, as observed in some mytilid bivalves. The symbionts
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14

McLean, Ailsa H. C., and H. Charles J. Godfray. "Evidence for specificity in symbiont-conferred protection against parasitoids." Proceedings of the Royal Society B: Biological Sciences 282, no. 1811 (2015): 20150977. http://dx.doi.org/10.1098/rspb.2015.0977.

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Many insects harbour facultative symbiotic bacteria, some of which have been shown to provide resistance against natural enemies. One of the best-known protective symbionts is Hamiltonella defensa , which in pea aphid ( Acyrthosiphon pisum ) confers resistance against attack by parasitoid wasps in the genus Aphidius (Braconidae). We asked (i) whether this symbiont also confers protection against a phylogenetically distant group of parasitoids (Aphelinidae) and (ii) whether there are consistent differences in the effects of bacteria found in pea aphid biotypes adapted to different host plants.
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15

Dunlap, Paul V., Jennifer C. Ast, Seishi Kimura, Atsushi Fukui, Tetsuo Yoshino, and Hiromitsu Endo. "Phylogenetic analysis of host?symbiont specificity and codivergence in bioluminescent symbioses." Cladistics 23, no. 5 (2007): 507–32. http://dx.doi.org/10.1111/j.1096-0031.2007.00157.x.

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16

Jones, B. W., and M. K. Nishiguchi. "Differentially expressed genes reveal adaptations between free-living and symbiotic niches of Vibrio fischeri in a fully established mutualism." Canadian Journal of Microbiology 52, no. 12 (2006): 1218–27. http://dx.doi.org/10.1139/w06-088.

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A major force driving in the innovation of mutualistic symbioses is the number of adaptations that both organisms must acquire to provide overall increased fitness for a successful partnership. Many of these symbioses are relatively dependent on the ability of the symbiont to locate a host (specificity), as well as provide some novel capability upon colonization. The mutualism between sepiolid squids and members of the Vibrionaceae is a unique system in which development of the symbiotic partnership has been studied in detail, but much remains unknown about the genetics of symbiont colonizatio
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17

Herrera, Marcela, Shannon G. Klein, Sara Campana, et al. "Temperature transcends partner specificity in the symbiosis establishment of a cnidarian." ISME Journal 15, no. 1 (2020): 141–53. http://dx.doi.org/10.1038/s41396-020-00768-y.

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AbstractCoral reef research has predominantly focused on the effect of temperature on the breakdown of coral-dinoflagellate symbioses. However, less is known about how increasing temperature affects the establishment of new coral-dinoflagellate associations. Inter-partner specificity and environment-dependent colonization are two constraints proposed to limit the acquisition of more heat tolerant symbionts. Here, we investigated the symbiotic dynamics of various photosymbionts in different host genotypes under “optimal” and elevated temperature conditions. To do this, we inoculated symbiont-fr
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18

Suzuki, Yohey, Shigeaki Kojima, Takenori Sasaki, et al. "Host-Symbiont Relationships in Hydrothermal Vent Gastropods of the Genus Alviniconcha from the Southwest Pacific." Applied and Environmental Microbiology 72, no. 2 (2006): 1388–93. http://dx.doi.org/10.1128/aem.72.2.1388-1393.2006.

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ABSTRACT Hydrothermal vent gastropods of the genus Alviniconcha are unique among metazoans in their ability to derive their nutrition from chemoautotrophic γ- and ε-proteobacterial endosymbionts. Although host-symbiont relationships in Alviniconcha gastropods from the Central Indian Ridge in the Indian Ocean and the Mariana Trough in the Western Pacific have been studied extensively, host-symbiont relationships in Alviniconcha gastropods from the Southwest Pacific remain largely unknown. Phylogenetic analysis using mitochondrial cytochrome c oxidase subunit I gene sequences of host gastropods
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19

Nobre, Tânia. "Olive fruit fly and its obligate symbiont Candidatus Erwinia dacicola: Two new symbiont haplotypes in the Mediterranean basin." PLOS ONE 16, no. 9 (2021): e0256284. http://dx.doi.org/10.1371/journal.pone.0256284.

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The olive fruit fly, specialized to become monophagous during several life stages, remains the most important olive tree pest with high direct production losses, but also affecting the quality, composition, and inherent properties of the olives. Thought to have originated in Africa is nowadays present wherever olive groves are grown. The olive fruit fly evolved to harbor a vertically transmitted and obligate bacterial symbiont -Candidatus Erwinia dacicola- leading thus to a tight evolutionary history between olive tree, fruit fly and obligate, vertical transmitted symbiotic bacterium. Consider
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20

Gutiérrez-García, Karina, Kevin Aumiller, Ren Dodge, et al. "A conserved bacterial genetic basis for commensal-host specificity." Science 386, no. 6726 (2024): 1117–22. https://doi.org/10.1126/science.adp7748.

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Animals selectively acquire specific symbiotic gut bacteria from their environments that aid host fitness. To colonize, a symbiont must locate its niche and sustain growth within the gut. Adhesins are bacterial cell surface proteins that facilitate attachment to host tissues and are often virulence factors for opportunistic pathogens. However, the attachments are often transient and nonspecific, and additional mechanisms are required to sustain infection. In this work, we use live imaging of individual symbiotic bacterial cells colonizing the gut of living Drosophila melanogaster to show that
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21

Tseng, Shu-Ping, Po-Wei Hsu, Chih-Chi Lee, et al. "Evidence for Common Horizontal Transmission of Wolbachia among Ants and Ant Crickets: Kleptoparasitism Added to the List." Microorganisms 8, no. 6 (2020): 805. http://dx.doi.org/10.3390/microorganisms8060805.

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While Wolbachia, an intracellular bacterial symbiont, is primarily transmitted maternally in arthropods, horizontal transmission between species has been commonly documented. We examined kleptoparasitism as a potential mechanism for Wolbachia horizontal transmission, using ant crickets and their host ants as the model system. We compared prevalence and diversity of Wolbachia across multiple ant cricket species with different degrees of host specificity/integration level. Our analyses revealed at least three cases of inter-ordinal Wolbachia transfer among ant and ant crickets, and also showed t
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22

Zamborsky, D. J., and M. K. Nishiguchi. "Phylogeographical Patterns among Mediterranean Sepiolid Squids and TheirVibrioSymbionts: Environment Drives Specificity among Sympatric Species." Applied and Environmental Microbiology 77, no. 2 (2010): 642–49. http://dx.doi.org/10.1128/aem.02105-10.

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ABSTRACTBobtail squid from the generaSepiolaandRondeletiola(Cephalopoda: Sepiolidae) form mutualistic associations with luminous Gram-negative bacteria (Gammaproteobacteria:Vibrionaceae) from the generaVibrioandPhotobacterium. Symbiotic bacteria proliferate inside a bilobed light organ until they are actively expelled by the host into the surrounding environment on a diel basis. This event results in a dynamic symbiont population with the potential to establish the symbiosis with newly hatched sterile (axenic) juvenile sepiolids. In this study, we examined the genetic diversity found in popula
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23

Weigel, Brooke L., and Patrick M. Erwin. "Intraspecific Variation in Microbial Symbiont Communities of the Sun Sponge, Hymeniacidon heliophila, from Intertidal and Subtidal Habitats." Applied and Environmental Microbiology 82, no. 2 (2015): 650–58. http://dx.doi.org/10.1128/aem.02980-15.

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ABSTRACTSponges host diverse and complex communities of microbial symbionts that display a high degree of host specificity. The microbiomes of conspecific sponges are relatively constant, even across distant locations, yet few studies have directly examined the influence of abiotic factors on intraspecific variation in sponge microbial community structure. The contrast between intertidal and subtidal environments is an ideal system to assess the effect of environmental variation on sponge-microbe symbioses, producing two drastically different environments on a small spatial scale. Here, we cha
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24

Powell, Elijah, Nalin Ratnayeke, and Nancy A. Moran. "Strain diversity and host specificity in a specialized gut symbiont of honeybees and bumblebees." Molecular Ecology 25, no. 18 (2016): 4461–71. http://dx.doi.org/10.1111/mec.13787.

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25

Sepp, Siim‐Kaarel, John Davison, Teele Jairus, et al. "Non‐random association patterns in a plant–mycorrhizal fungal network reveal host–symbiont specificity." Molecular Ecology 28, no. 2 (2018): 365–78. http://dx.doi.org/10.1111/mec.14924.

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26

Flemming, Felicitas E., Alexey Potekhin, Thomas Pröschold, and Martina Schrallhammer. "Algal Diversity in Paramecium bursaria: Species Identification, Detection of Choricystis parasitica, and Assessment of the Interaction Specificity." Diversity 12, no. 8 (2020): 287. http://dx.doi.org/10.3390/d12080287.

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The ‘green’ ciliate Paramecium bursaria lives in mutualistic symbiosis with green algae belonging to the species Chlorella variabilis or Micractinium conductrix. We analysed the diversity of algal endosymbionts and their P. bursaria hosts in nine strains from geographically diverse origins. Therefore, their phylogenies using different molecular markers were inferred. The green paramecia belong to different syngens of P. bursaria. The intracellular algae were assigned to Chl. variabilis, M. conductrix or, surprisingly, Choricystis parasitica. This usually free-living alga co-occurs with M. cond
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27

Wooding, Amy L., Michael J. Wingfield, Brett P. Hurley, Jeffrey R. Garnas, Peter de Groot, and Bernard Slippers. "Lack of fidelity revealed in an insect–fungal mutualism after invasion." Biology Letters 9, no. 4 (2013): 20130342. http://dx.doi.org/10.1098/rsbl.2013.0342.

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Symbiont fidelity is an important mechanism in the evolution and stability of mutualisms. Strict fidelity has been assumed for the obligate mutualism between Sirex woodwasps and their mutualistic Amylostereum fungi. This assumption has been challenged in North America where the European woodwasp, Sirex noctilio , and its fungal mutualist, Amylostereum areolatum , have recently been introduced. We investigate the specificity of the mutualism between Sirex and Amylostereum species in Canada, where S. noctilio co-infests Pinus with native Sirex nigricornis and its mutualist, Amylostereum chaillet
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28

Münchhoff, Julia, Euichi Hirose, Tadashi Maruyama, Michio Sunairi, Brendan P. Burns, and Brett A. Neilan. "Host specificity and phylogeography of the prochlorophyte Prochloron sp., an obligate symbiont in didemnid ascidians." Environmental Microbiology 9, no. 4 (2007): 890–99. http://dx.doi.org/10.1111/j.1462-2920.2006.01209.x.

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29

Matthews, Jennifer L., Clinton A. Oakley, Adrian Lutz, et al. "Partner switching and metabolic flux in a model cnidarian–dinoflagellate symbiosis." Proceedings of the Royal Society B: Biological Sciences 285, no. 1892 (2018): 20182336. http://dx.doi.org/10.1098/rspb.2018.2336.

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Metabolite exchange is fundamental to the viability of the cnidarian–Symbiodiniaceae symbiosis and survival of coral reefs. Coral holobiont tolerance to environmental change might be achieved through changes in Symbiodiniaceae species composition, but differences in the metabolites supplied by different Symbiodiniaceae species could influence holobiont fitness. Using 13 C stable-isotope labelling coupled to gas chromatography–mass spectrometry, we characterized newly fixed carbon fate in the model cnidarian Exaiptasia pallida (Aiptasia) when experimentally colonized with either native Breviolu
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30

Zhou, Nihong, Shangning Yang, Ruike Wei, Fuliang Hu, Dandan Liu, and Huoqing Zheng. "Host Specificity of Snodgrassella in Eastern and Western Honeybees and Its Effects on Naturally Occurring Deformed Wing Virus Titers." Insects 16, no. 5 (2025): 478. https://doi.org/10.3390/insects16050478.

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Honeybee gut microbiota undergoes long-term adaptive evolution with the host, resulting in host-specific genomic and functional characteristics. However, the specific role of host-specialized strains in shaping host physiological functions remains understudied. This study investigates the host specificity of the core gut symbiont Snodgrassella in A. cerana and A. mellifera, exploring its effects on immune response and natural virus suppression through genomic analysis and colonization experiments. Genomic analysis revealed that strain from A. mellifera, exhibited a larger genome and greater ge
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31

Keshavmurthy, Shashank, Hwee Sze Tee, Kuo-Wei Kao, Jih-Terng Wang, and Chaolun Allen Chen. "Specificity trumps flexibility—location-based stable associations between Symbiodiniaceae genera and Platygyra verweyi (Scleractinia; Merulinidae)." PeerJ 8 (May 5, 2020): e8791. http://dx.doi.org/10.7717/peerj.8791.

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This study monitored symbiont communities bi-monthly in native coral cores used in a reciprocal transplantation of the coral Platygyra verweyi over two years (2014–2016) and samples of mother colonies from three locations with variable thermal regimes; our results show that associating with multiple Symbiodiniaceae genera (Cladocopium spp. and Durusdinium spp.) is not a prerequisite for symbiont shuffling. Platygyra verweyi associates with certain Symbiodiniaceae genera based on location. Results of quantitative real-time PCR indicated small-scale temporal changes in Symbiodiniaceae genera com
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Anollés, Gustavo Caetano, and Gabriel Favelukes. "Host-Symbiont Specificity Expressed during Early Adsorption of Rhizobium meliloti to the Root Surface of Alfalfa †." Applied and Environmental Microbiology 52, no. 2 (1986): 377–82. http://dx.doi.org/10.1128/aem.52.2.377-382.1986.

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Osman, Eslam O., and Alexis M. Weinnig. "Microbiomes and Obligate Symbiosis of Deep-Sea Animals." Annual Review of Animal Biosciences 10, no. 1 (2022): 151–76. http://dx.doi.org/10.1146/annurev-animal-081621-112021.

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Microbial communities associated with deep-sea animals are critical to the establishment of novel biological communities in unusual environments. Over the past few decades, rapid exploration of the deep sea has enabled the discovery of novel microbial communities, some of which form symbiotic relationships with animal hosts. Symbiosis in the deep sea changes host physiology, behavior, ecology, and evolution over time and space. Symbiont diversity within a host is often aligned with diverse metabolic pathways that broaden the environmental niche for the animal host. In this review, we focus on
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Tsang, Ling Ming, Ka Hou Chu, Yoko Nozawa, and Benny Kwok Kan Chan. "Morphological and host specificity evolution in coral symbiont barnacles (Balanomorpha: Pyrgomatidae) inferred from a multi-locus phylogeny." Molecular Phylogenetics and Evolution 77 (August 2014): 11–22. http://dx.doi.org/10.1016/j.ympev.2014.03.002.

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35

van de Peppel, Lennart J. J., and Duur K. Aanen. "High diversity and low host-specificity of Termitomyces symbionts cultivated by Microtermes spp. indicate frequent symbiont exchange." Fungal Ecology 45 (June 2020): 100917. http://dx.doi.org/10.1016/j.funeco.2020.100917.

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Cooke, Ira, Hua Ying, Sylvain Forêt, et al. "Genomic signatures in the coral holobiont reveal host adaptations driven by Holocene climate change and reef specific symbionts." Science Advances 6, no. 48 (2020): eabc6318. http://dx.doi.org/10.1126/sciadv.abc6318.

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Genetic signatures caused by demographic and adaptive processes during past climatic shifts can inform predictions of species’ responses to anthropogenic climate change. To identify these signatures in Acropora tenuis, a reef-building coral threatened by global warming, we first assembled the genome from long reads and then used shallow whole-genome resequencing of 150 colonies from the central inshore Great Barrier Reef to inform population genomic analyses. We identify population structure in the host that reflects a Pleistocene split, whereas photosymbiont differences between reefs most lik
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Onchuru, Thomas Ogao, Edward Edmond Makhulu, Purity Cassandra Ronnie, et al. "The Plasmodium transmission-blocking symbiont, Microsporidia MB, is vertically transmitted through Anopheles arabiensis germline stem cells." PLOS Pathogens 20, no. 11 (2024): e1012340. http://dx.doi.org/10.1371/journal.ppat.1012340.

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Microsporidia MB is a promising candidate for developing a symbiont-based strategy for malaria control because it disrupts the capacity of An. arabiensis to transmit the Plasmodium parasite. The symbiont is predominantly localized in the reproductive organs and is transmitted vertically from mother to offspring and horizontally (sexually) during mating. Due to the contribution of both transmission routes, Microsporidia MB has the potential to spread through target vector populations and become established at high prevalence. Stable and efficient vertical transmission of Microsporidia MB is imp
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38

Godbout, C., and J. A. Fortin. "Synthesized ectomycorrhizae of aspen: fungal genus level of structural characterization." Canadian Journal of Botany 63, no. 2 (1985): 252–62. http://dx.doi.org/10.1139/b85-029.

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The ability of Populus tremuloides Michx. to form ectomycorrhizae with identified species of fungi was investigated using a pouch technique. Twenty-nine out of 54 fungus species formed ectomycorrhizae on aspen seedlings. Aspen seems to display little specificity for ectomycorrhizal fungi. Only epidermal Hartig nets were observed in the synthesized ectomycorrhizae and periepidermal ones were frequently encountered. Structural and morphological characteristics of ectomycorrhizae are presented by genus of mycorrhizal fungi. This grouping of characters by genus seems possible independently of the
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Kim Tiam, Sandra, Hasna Boubakri, Lorine Bethencourt, Danis Abrouk, Pascale Fournier, and Aude Herrera-Belaroussi. "Genomic Insights of Alnus-Infective Frankia Strains Reveal Unique Genetic Features and New Evidence on Their Host-Restricted Lifestyle." Genes 14, no. 2 (2023): 530. http://dx.doi.org/10.3390/genes14020530.

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The present study aimed to use comparative genomics to explore the relationships between Frankia and actinorhizal plants using a data set made of 33 Frankia genomes. The determinants of host specificity were first explored for “Alnus-infective strains” (i.e., Frankia strains belonging to Cluster Ia). Several genes were specifically found in these strains, including an agmatine deiminase which could possibly be involved in various functions as access to nitrogen sources, nodule organogenesis or plant defense. Within “Alnus-infective strains”, Sp+ Frankia genomes were compared to Sp− genomes in
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Beliavskaia, Alexandra Y., Alexander V. Predeus, Sofya K. Garushyants, et al. "New Intranuclear Symbiotic Bacteria from Macronucleus of Paramecium putrinum—“Candidatus Gortzia Yakutica”." Diversity 12, no. 5 (2020): 198. http://dx.doi.org/10.3390/d12050198.

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Holospora-like bacteria (HLB) are obligate intracellular Alphaproteobacteria, inhabiting nuclei of Paramecium and other ciliates such as “Candidatus Hafkinia” is in Frontonia. The HLB clade is comprised of four genera, Holospora, Preeria, “Candidatus Gortzia”, and “Candidatus Hafkinia”. These bacteria have a peculiar life cycle with two morphological forms and some degree of specificity to the host species and the type of nucleus they inhabit. Here we describe a novel species of HLB—“Candidatus Gortzia yakutica” sp. nov.—a symbiont from the macronucleus of Paramecium putrinum, the first descri
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Fujishima, M., and M. Fujita. "Infection and maintenance of Holospora obtusa, a macronucleus-specific bacterium of the ciliate Paramecium caudatum." Journal of Cell Science 76, no. 1 (1985): 179–87. http://dx.doi.org/10.1242/jcs.76.1.179.

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The gram-negative bacterium Holospora obtusa is a macronucleus-specific symbiont of the ciliate Paramecium caudatum, which invades the host cell via a food vacuole, infects its macronucleus and grows exclusively in the nucleus. From infection experiments, we showed that a property of the macronucleus that is necessary for it to be recognized and infected by H. obtusa is commonly provided by P. caudatum, P. multimicronucleatum and 14 species of the P. aurelia complex, but not by P. jenningsi, P. bursaria, P. trichium, P. duboscqui, Didinium nasutum, Blepharisma japonicum, Pseudourostyla levis,
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Hamilton, Phineas T., Fangni Peng, Martin J. Boulanger, and Steve J. Perlman. "A ribosome-inactivating protein in a Drosophila defensive symbiont." Proceedings of the National Academy of Sciences 113, no. 2 (2015): 350–55. http://dx.doi.org/10.1073/pnas.1518648113.

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Vertically transmitted symbionts that protect their hosts against parasites and pathogens are well known from insects, yet the underlying mechanisms of symbiont-mediated defense are largely unclear. A striking example of an ecologically important defensive symbiosis involves the woodland fly Drosophila neotestacea, which is protected by the bacterial endosymbiont Spiroplasma when parasitized by the nematode Howardula aoronymphium. The benefit of this defense strategy has led to the rapid spread of Spiroplasma throughout the range of D. neotestacea, although the molecular basis for this protect
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Popovici, Jean, Gilles Comte, �milie Bagnarol, et al. "Differential Effects of Rare Specific Flavonoids on Compatible and Incompatible Strains in the Myrica gale-Frankia Actinorhizal Symbiosis." Applied and Environmental Microbiology 76, no. 8 (2010): 2451–60. http://dx.doi.org/10.1128/aem.02667-09.

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ABSTRACT Plant secondary metabolites, and specifically phenolics, play important roles when plants interact with their environment and can act as weapons or positive signals during biotic interactions. One such interaction, the establishment of mutualistic nitrogen-fixing symbioses, typically involves phenolic-based recognition mechanisms between host plants and bacterial symbionts during the early stages of interaction. While these mechanisms are well studied in the rhizobia-legume symbiosis, little is known about the role of plant phenolics in the symbiosis between actinorhizal plants and Fr
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Weis, Virginia, Wendy Reynolds, Melissa deBoer, and Dave Krupp. "Host-symbiont specificity during onset of symbiosis between the dinoflagellates Symbiodinium spp. and planula larvae of the scleractinian coral Fungia scutaria." Coral Reefs 20, no. 3 (2001): 301–8. http://dx.doi.org/10.1007/s003380100179.

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Pipes, Brian L., and Michele K. Nishiguchi. "Nocturnal Acidification: A Coordinating Cue in the Euprymna scolopes–Vibrio fischeri Symbiosis." International Journal of Molecular Sciences 23, no. 7 (2022): 3743. http://dx.doi.org/10.3390/ijms23073743.

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The Vibrio fischeri–Euprymna scolopes symbiosis has become a powerful model for the study of specificity, initiation, and maintenance between beneficial bacteria and their eukaryotic partner. In this invertebrate model system, the bacterial symbionts are acquired every generation from the surrounding seawater by newly hatched squid. These symbionts colonize a specialized internal structure called the light organ, which they inhabit for the remainder of the host’s lifetime. The V. fischeri population grows and ebbs following a diel cycle, with high cell densities at night producing bioluminesce
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Bailly, Xavier, Isabelle Olivieri, Brigitte Brunel, Jean-Claude Cleyet-Marel, and Gilles Béna. "Horizontal Gene Transfer and Homologous Recombination Drive the Evolution of the Nitrogen-Fixing Symbionts of Medicago Species." Journal of Bacteriology 189, no. 14 (2007): 5223–36. http://dx.doi.org/10.1128/jb.00105-07.

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ABSTRACT Using nitrogen-fixing Sinorhizobium species that interact with Medicago plants as a model system, we aimed at clarifying how sex has shaped the diversity of bacteria associated with the genus Medicago on the interspecific and intraspecific scales. To gain insights into the diversification of these symbionts, we inferred a topology that includes the different specificity groups which interact with Medicago species, based on sequences of the nodulation gene cluster. Furthermore, 126 bacterial isolates were obtained from two soil samples, using Medicago truncatula and Medicago laciniata
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Swain, Timothy D., Mark W. Westneat, Vadim Backman, and Luisa A. Marcelino. "Phylogenetic analysis of symbiont transmission mechanisms reveal evolutionary patterns in thermotolerance and host specificity that enhance bleaching resistance among vertically transmitted Symbiodinium." European Journal of Phycology 53, no. 4 (2018): 443–59. http://dx.doi.org/10.1080/09670262.2018.1466200.

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Schechter, Shannon P., and Thomas D. Bruns. "A Common Garden Test of Host-Symbiont Specificity Supports a Dominant Role for Soil Type in Determining AMF Assemblage Structure in Collinsia sparsiflora." PLoS ONE 8, no. 2 (2013): e55507. http://dx.doi.org/10.1371/journal.pone.0055507.

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Schmitt, Susanne, Hilde Angermeier, Roswitha Schiller, Niels Lindquist, and Ute Hentschel. "Molecular Microbial Diversity Survey of Sponge Reproductive Stages and Mechanistic Insights into Vertical Transmission of Microbial Symbionts." Applied and Environmental Microbiology 74, no. 24 (2008): 7694–708. http://dx.doi.org/10.1128/aem.00878-08.

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ABSTRACT Many marine sponges, hereafter termed high-microbial-abundance (HMA) sponges, harbor large and complex microbial consortia, including bacteria and archaea, within their mesohyl matrices. To investigate vertical microbial transmission as a strategy to maintain these complex associations, an extensive phylogenetic analysis was carried out with the 16S rRNA gene sequences of reproductive (n = 136) and adult (n = 88) material from five different Caribbean species, as well as all published 16S rRNA gene sequences from sponge offspring (n = 116). The overall microbial diversity, including m
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LaJeunesse, Todd C., Daniel T. Pettay, Eugenia M. Sampayo, et al. "Long-standing environmental conditions, geographic isolation and host-symbiont specificity influence the relative ecological dominance and genetic diversification of coral endosymbionts in the genusSymbiodinium." Journal of Biogeography 37, no. 5 (2010): 785–800. http://dx.doi.org/10.1111/j.1365-2699.2010.02273.x.

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