Planctomycetes and macroalgae, a striking association

Frontiers in Microbiology, Journal Year: 2014, Volume and Issue: 5

Published: June 3, 2014

Planctomycetes are part of the complex microbial biofilm community a wide range macroalgae. Recently, some studies began to unveil great diversity present in this microenvironment and interactions between two organisms. Culture dependent independent methods revealed existence number species but, so far, only less than ten have been isolated. comprise genera Rhodopirellula, Blastopirellula Planctomyces, Phycisphaera uncultured class OM190 other taxa found association. Several factors favour colonization macroalgal surfaces by planctomycetes. Many possess holdfasts for attachment. The macroalgae secrete various sulphated polysaccharides that substrate abundant sulfatases produced Specificity planctomycetes seem exist which may be related chemical nature each macroalga. Furthermore, peptidoglycan-free cell wall allows them resist action several antimicrobial compounds or bacteria effective against biofouling microorganisms. Despite increase our knowledge on successful planctomycetes-macroalgae association, effort fully understand interaction is needed.

Language: Английский

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Host-microbe interactions in octocoral holobionts - recent advances and perspectives

Microbiome, Journal Year: 2018, Volume and Issue: 6(1)

Published: April 2, 2018

Octocorals are one of the most ubiquitous benthic organisms in marine ecosystems from shallow tropics to Antarctic deep sea, providing habitat for numerous as well ecosystem services humans. In contrast holobionts reef-building scleractinian corals, octocorals have received relatively little attention, despite devastating effects disease outbreaks on many populations. Recent advances shown that possess remarkably stable bacterial communities geographical and temporal scales under environmental stress. This may be result their high capacity regulate microbiome through production antimicrobial quorum-sensing interfering compounds. Despite decades research relating octocoral-microbe interactions, a synthesis this expanding field has not been conducted date. We therefore provide an urgently needed review our current knowledge about octocoral holobionts. Specifically, we briefly introduce ecological role concept holobiont before detailed overviews (I) symbiosis between algal symbiont Symbiodinium; (II) main fungal, viral, taxa associated with octocorals; (III) dominance microbial assemblages by few species, stability these associations, evolutionary history host organism; (IV) diseases; (V) how use immune system fight pathogens; (VI) regulation its microbes; (VII) discovery natural products regulatory activities. Finally, present perspectives should move forward, recognition suitable model study coral-microbe symbioses.

Language: Английский

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Bacterial community diversity of the deep-sea octocoralParamuricea placomus

PeerJ, Journal Year: 2016, Volume and Issue: 4, P. e2529 - e2529

Published: Sept. 29, 2016

Compared to tropical corals, much less is known about deep-sea coral biology and ecology. Although the microbial communities of some corals have been described, this first study characterize bacterial community associated with octocoral, Paramuricea placomus . Samples from five colonies P. were collected Baltimore Canyon (379–382 m depth) in Atlantic Ocean off east coast United States America. DNA was extracted samples 16S rRNA gene amplicons pyrosequenced using V4-V5 primers. Three sequenced deeply (>4,000 sequences each) further analyzed. The dominant phylum Proteobacteria, but other major phyla included Firmicutes Planctomycetes. A conserved taxa held common across three identified, comprising 68–90% total depending on individual. does not appear include genus Endozoicomonas , which has found previously be associate several temperate gorgonians. Inferred functionality suggests possibility nitrogen cycling by core community.

Language: Английский

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Pyrosequencing Reveals Diverse Microbial Community Associated with the Zoanthid Palythoa australiae from the South China Sea

Microbial Ecology, Journal Year: 2014, Volume and Issue: 67(4), P. 942 - 950

Published: Feb. 27, 2014

Language: Английский

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Host-specific symbioses and the microbial prey of a pelagic tunicate (Pyrosoma atlanticum)

ISME Communications, Journal Year: 2021, Volume and Issue: 1(1)

Published: April 14, 2021

Pyrosomes are widely distributed pelagic tunicates that have the potential to reshape marine food webs when they bloom. However, their grazing preferences and interactions with background microbial community poorly understood. This is first study of microorganisms associated pyrosomes undertaken improve understanding pyrosome biology, impact blooms on systems, symbioses animals. The diversity, relative abundance, taxonomy pyrosome-associated were compared seawater during a Pyrosoma atlanticum bloom in Northern California Current System using high-throughput sequencing 16S rRNA gene, microscopy, flow cytometry. We found harbor microbiome distinct from surrounding seawater, which was dominated by few novel taxa. In addition dominant taxa, numerous more rare pyrosome-specific taxa recovered. Multiple bioluminescent present pyrosomes, may be source iconic luminescence. also discovered free-living association suggesting feeding impacts all size classes but preferentially removes larger eukaryotic demonstrates symbionts prey central biology. higher trophic level webs, work suggests alter at through seeding communities symbionts. Future efforts predict blooms, account for ecosystem impacts, should consider communities.

Language: Английский

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Nitric oxide and heat shock protein 90 co-regulate temperature-induced bleaching in the soft coral Eunicea fusca

Coral Reefs, Journal Year: 2014, Volume and Issue: 33(2), P. 513 - 522

Published: March 17, 2014

Language: Английский

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Lesion recovery and the bacterial microbiome in two Caribbean gorgonian corals

Marine Biology, Journal Year: 2016, Volume and Issue: 163(12)

Published: Oct. 24, 2016

Language: Английский

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