Taxonomic Composition and Biological Activity of Microorganisms Associated with a Marine Ascidian Halocynthia aurantium

Taxonomic Composition and Biological Activity of Microorganisms Associated with a Marine Ascidian... The taxonomy and biological activity of 176 heterotrophic microorganisms associated with the ascidian Halocynthia aurantiumfrom the coastal waters of Peter the Great Bay (Sea of Japan) were studied. In the microbial community, bacteria of the genera Pseudoalteromonas(38% of all strains studied) and Bacillus(25%) prevailed and showed high biological activity. Bacteria of Pseudoalteromonaswere capable of extracellular hydrolases production and exhibited high antibiotic and antimicrobial properties. Five Pseudoalteromonasstrains were capable of restriction enzyme production. A significant proportion of the pseudoalteromonads inhibited growth ofProteus vulgarisand Candida albicans(81 and 84%, respectively). Spore-forming bacteria of Bacilluswere capable of chitin hydrolysis and extracellular inducible RNAses production (23%). They were active against Staphylococcus aureusand Bacillus subtilis(39 and 23%, respectively). Bacillus pumilusstrain KMM 1364 showed hemolytic activity and antagonistic properties against S. aureusand was found to produce surface active glycolipids and surfactinlike cyclic depsipeptides. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Russian Journal of Marine Biology Springer Journals

Taxonomic Composition and Biological Activity of Microorganisms Associated with a Marine Ascidian Halocynthia aurantium

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Publisher
Kluwer Academic Publishers-Plenum Publishers
Copyright
Copyright © 2001 by MAIK “Nauka/Interperiodica”
Subject
Life Sciences; Freshwater & Marine Ecology
ISSN
1063-0740
eISSN
1608-3377
D.O.I.
10.1023/A:1012548513766
Publisher site
See Article on Publisher Site

Abstract

The taxonomy and biological activity of 176 heterotrophic microorganisms associated with the ascidian Halocynthia aurantiumfrom the coastal waters of Peter the Great Bay (Sea of Japan) were studied. In the microbial community, bacteria of the genera Pseudoalteromonas(38% of all strains studied) and Bacillus(25%) prevailed and showed high biological activity. Bacteria of Pseudoalteromonaswere capable of extracellular hydrolases production and exhibited high antibiotic and antimicrobial properties. Five Pseudoalteromonasstrains were capable of restriction enzyme production. A significant proportion of the pseudoalteromonads inhibited growth ofProteus vulgarisand Candida albicans(81 and 84%, respectively). Spore-forming bacteria of Bacilluswere capable of chitin hydrolysis and extracellular inducible RNAses production (23%). They were active against Staphylococcus aureusand Bacillus subtilis(39 and 23%, respectively). Bacillus pumilusstrain KMM 1364 showed hemolytic activity and antagonistic properties against S. aureusand was found to produce surface active glycolipids and surfactinlike cyclic depsipeptides.

Journal

Russian Journal of Marine BiologySpringer Journals

Published: Oct 16, 2004

References

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