Experimental associations of cyanobacteria and actinomycetes

Omarova, E. O.; Zenova, G. M.; Orleanskii, V. K.; Лобакова, Е. С.

doi:10.3103/s0096392507010014

Cited by 3 publications

(4 citation statements)

References 3 publications

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“…Morphological and ultrastructural peculiarities allowed identifying the planctomycetes, prosthecobacteria belonging to the genus Caulobacter and actinomycetes among non-phototrophic epibiotic bacteria. The actinomycetes were identified as the representatives of the genus Streptomyces by means of isolation in the enrichment culture and phagotyping (Omarova et al , 2008). Certain epibiotic forms of cyanobacteria and other prokaryotes display defective rigidity of the cell wall, and partial or complete reduction of the cell wall (forms with defective cell wall—FDCW) (Gorelova et al , 2009b).…”

Section: Resultsmentioning

confidence: 99%

“…Morphological and ultrastructural characters allowed identifying planctomycetes, prosthecobacteria, actinomycetes and cyanobacteria as prokaryotes associated with hydroid. After sterilization we managed to isolate unicellular microalgae and different bacteria (including those capable of nitrogen fixation) from the tissues of the hydroid colony (Omarova et al , 2008; Gorelova et al , 2009a, b).…”

Section: Discussionmentioning

confidence: 99%

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Associations between the White Sea colonial hydroidDynamena pumilaand microorganisms

et al. 2012

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Marine sessile invertebrates with outer skeleton constitute additional substrate for a diverse group of epibiotic organisms. Colonial hydroids are no exception. Large numbers of motile and sessile organisms use hydroid colonies covered with chitinous perisarc for permanent or temporal attachment. Such epibiotic associations between colonial hydroids and microorganisms are poorly studied and mostly known for subtropical regions. There are no data about the development of such epibiotic association and type of its specificity yet. The present paper for the first time describes the epibiotic association of the colonial thecate hydroidDynamena pumilafrom the high latitude sea. We reconstruct the spatial and temporal development of such epibiotic community and analyse the organization of the multicomponent biofilm covering the hydroid colony. Comparison of the epibiotic community in different seasons indicates for holding out of the basal features and components of the community during the whole year. Ultrastructural investigations revealed that components of the biofilm affect the outer skeleton of the hydroid colony that results in penetration of the microorganisms into the skeleton and even soft tissues. Our data allow supposing that association of hydroidD. pumilawith a microorganism community has features of a symbiotic system.

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Section: Resultsmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Associations between the White Sea colonial hydroidDynamena pumilaand microorganisms

et al. 2012

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“…Also, other studies have shown the stimulation of Oscillatoria terebriformis growth in the associated culture with the streptomyces strain. In addition, increased nitrogen fixation by Anabaena variabilis and higher photosynthetic activity of O. terebriformis in streptomyces-associated culture was recorded [ 62 ]. Michel et al [ 63 ] showed that some algae and actinobacteria are closely related in their evolution.…”

Section: Discussionmentioning

confidence: 99%

Cultivable Actinobacteria First Found in Baikal Endemic Algae Is a New Source of Natural Products with Antibiotic Activity

Axenov-Gribanov

Kostka

Vasilieva

et al. 2020

International Journal of Microbiology

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Inadequate use of antibiotics has led to spread of microorganisms resistant to effective antimicrobial compounds for humans and animals. This study was aimed to isolate cultivable strains of actinobacteria associated with Baikal endemic alga Draparnaldioides baicalensis and estimate their antibiotic properties. During this study, we isolated both widespread and dominant strains related to the genus Streptomyces and representatives of the genera Saccharopolyspora, Nonomuraea, Rhodococcus, and Micromonospora. For the first time, actinobacteria belonging to the genera Nonomuraea and Saccharopolyspora were isolated from Baikal ecosystem. Also, it was the first time when actinobacteria of the genus Nonomuraea were isolated from freshwater algae. Some rare strains demonstrated activity inhibiting growth of bacteria and yeasts. Also, it has been shown that the strains associated with Baikal alga D. baicalensis are active against both Gram-positive and Gram-negative bacteria. According to this study and previously published materials, diversity of cultivable actinobacteria and rare strains isolated from D. baicalensis is comparable to that of cultivable actinobacteria previously isolated from plant sources of Lake Baikal. Also, it exceeds the cultivable actinobacteria diversity previously described for macroinvertebrates, water, or sediments of Lake Baikal. The large number of rare and active strains associated with the endemic alga D. baicalensis could be the promising sources for biopharmaceutical and biotechnological developments and discovery of new natural compounds.

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“…The association of bacteria with a cyanobacterial host is quite diverse and encompasses all phyla including Firmicutes, Actinobacteria, and γ-proteobacteria [14]. These assemblages constitute highly specific symbiotic relationships.…”

Section: Introductionmentioning

confidence: 99%

Micrococcin P1 and P2 from Epibiotic Bacteria Associated with Isolates of Moorea producens from Kenya

2022

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Epibiotic bacteria associated with the filamentous marine cyanobacterium Moorea producens were explored as a novel source of antibiotics and to establish whether they can produce cyclodepsipeptides on their own. Here, we report the isolation of micrococcin P1 (1) (C48H49N13O9S6; obs. m/z 1144.21930/572.60381) and micrococcin P2 (2) (C48H47N13O9S6; obs. m/z 1142.20446/571.60370) from a strain of Bacillus marisflavi isolated from M. producens’ filaments. Interestingly, most bacteria isolated from M. producens’ filaments were found to be human pathogens. Stalked diatoms on the filaments suggested a possible terrestrial origin of some epibionts. CuSO4.5H2O assisted differential genomic DNA isolation and phylogenetic analysis showed that a Kenyan strain of M. producens differed from L. majuscula strain CCAP 1446/4 and L. majuscula clones. Organic extracts of the epibiotic bacteria Pseudoalteromonas carrageenovora and Ochrobactrum anthropi did not produce cyclodepsipeptides. Further characterization of 24 Firmicutes strains from M. producens identified extracts of B. marisflavi as most active. Our results showed that the genetic basis for synthesizing micrococcin P1 (1), discovered in Bacillus cereus ATCC 14579, is species/strain-dependent and this reinforces the need for molecular identification of M. producens species worldwide and their epibionts. These findings indicate that M. producens-associated bacteria are an overlooked source of antimicrobial compounds.

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Experimental associations of cyanobacteria and actinomycetes

Cited by 3 publications

References 3 publications

Associations between the White Sea colonial hydroidDynamena pumilaand microorganisms

Associations between the White Sea colonial hydroidDynamena pumilaand microorganisms

Cultivable Actinobacteria First Found in Baikal Endemic Algae Is a New Source of Natural Products with Antibiotic Activity

Micrococcin P1 and P2 from Epibiotic Bacteria Associated with Isolates of Moorea producens from Kenya

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