Bioaccumulation of Vanadium by Vanadium-Resistant Bacteria Isolated from the Intestine of Ascidia sydneiensis samea

Romaidi, Romaidi and Ueki, Tatsuya (2016) Bioaccumulation of Vanadium by Vanadium-Resistant Bacteria Isolated from the Intestine of Ascidia sydneiensis samea. Marine Biotechnology, 18 (3). pp. 359-371. ISSN 1436-2228

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Isolation of naturally occurring bacterial strains from metal-rich environments has gained popularity due to the growing need for bioremediation technologies. In this study, we found that the vanadium concentration in the intestine of the vanadium-rich ascidian Ascidia sydneiensis samea could reach 0.67 mM, and thus, we isolated vanadium-resistant bacteria from the intestinal contents and determined the ability of each bacterial strain to accumulate vanadium and other heavy metals. Nine strains of vanadium-resistant bacteria were successfully isolated, of which two strains, V-RA-4 and S-RA-6, accumulated vanadium at a higher rate than did the other strains. The maximum vanadium absorption by these bacteria was achieved at pH 3, and intracellular accumulation was the predominant mechanism. Each strain strongly accumulated copper and cobalt ions, but accumulation of nickel and molybdate ions was relatively low. These bacterial strains can be applied to protocols for bioremediation of vanadium and heavy metal toxicity.

Item Type: Journal Article
Keywords: Ascidian; Bioaccumulation; Heavy metals; Intestine; Vanadium-resistant bacteria; Bacteria; Bioaccumulation; Biochemistry; Bioremediation; Biotechnology; Heavy metals, Ascidian; Bioremediation technologies; Heavy metal toxicity; Intestine; Intracellular accumulation; Naturally occurring; Resistant bacteria; Vanadium concentration; Vanadium, adsorption, bacterium; bioaccumulation; bioremediation; concentration (composition); invertebrate; pH; toxicity; vanadium, Ascidia; Ascidia sydneiensis samea; Bacteria (microorganisms), cobalt; copper; RNA 16S; vanadium, adaptation; animal; bacterium; bioremediation; classification; DNA sequence; genetics; intestine; intestine flora; ion transport; isolation and purification; kinetics; metabolism; microbiology; pH; phylogeny; Urochordata, Adaptation, Physiological; Animals; Bacteria; Biodegradation, Environmental; Cobalt; Copper; Gastrointestinal Microbiome; Hydrogen-Ion Concentration; Intestines; Ion Transport; Kinetics; Phylogeny; RNA, Ribosomal, 16S; Sequence Analysis, DNA; Urochordata; Vanadium
Divisions: Faculty of Mathematics and Sciences > Department of Biology
Depositing User: Indar Ristamonika Erdiana
Date Deposited: 25 May 2018 15:05


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