Abstract
Iodide-oxidizing bacteria (IOB), which oxidize iodide (I−) to molecular iodine (I2), were isolated from iodide-rich (63 μM to 1.2 mM) natural gas brine waters collected from several locations. Agar media containing iodide and starch were prepared, and brine waters were spread directly on the media. The IOB, which appeared as purple colonies, were obtained from 28 of the 44 brine waters. The population sizes of IOB in the brines were 102 to 105 colony-forming units (CFU) mL−1. However, IOB were not detected in natural seawaters and terrestrial soils (fewer than 10 CFU mL−1 and 102 CFU g wet weight of soils−1, respectively). Interestingly, after the enrichment with 1 mM iodide, IOB were found in 6 of the 8 seawaters with population sizes of 103 to 105 CFU mL−1. 16S rDNA sequencing and phylogenetic analyses showed that the IOB strains are divided into two groups within the α-subclass of the Proteobacteria. One of the groups was phylogenetically most closely related to Roseovarius tolerans with sequence similarities between 94% and 98%. The other group was most closely related to Rhodothalassium salexigens, although the sequence similarities were relatively low (89% to 91%). The iodide-oxidizing reaction by IOB was mediated by an extracellular enzyme protein that requires oxygen. Radiotracer experiments showed that IOB produce not only I2 but also volatile organic iodine, which were identified as diiodomethane (CH2I2) and chloroiodomethane (CH2ClI). These results indicate that at least two types of IOB are distributed in the environment, and that they are preferentially isolated in environments in which iodide levels are very high. It is possible that IOB oxidize iodide in the natural environment, and they could significantly contribute to the biogeochemical cycling of iodine.
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References
Allgaier M, Uphoff H, Felske A, Wagner-Dobler I (2003) Aerobic anoxygenic photosynthesis in Roseobacter clade bacteria from diverse marine habitats. Appl Environ Microbiol 69: 5051–5059
Almeida M, Filipe S, Humanes M, Maia MF, Melo R, Severino N, da, Silva JA, Frausto da, Silva JJ, Wever R (2001) Vanadium haloperoxidases from brown algae of the Laminariaceae family. Phytochemistry 57: 633–642
Amachi S, Kamagata Y, Kanagawa T, Muramatsu Y (2001) Bacteria mediate methylation of iodine in marine and terrestrial environments. Appl Environ Microbiol 67: 2718–2722
Amachi S, Kasahara M, Fujii T, Shinoyama H, Hanada S, Kamagata Y, Bam-nai T, Muramatsu Y (2004) Radiotracer experiments on biological volatilization of organic iodine from coastal seawaters. Geomicrobiology J 21: 481–488
Amachi S, Kasahara M, Hanada S, Kamagata Y, Shinoyama H, Fujii T, Muramatsu Y (2003) Microbial participation in iodine volatilization from soils. Environ Sci Technol 37: 3885–3890
Amachi S, Muramatsu Y, Kamagata Y (2000) Radioanalytical determination of biogenic volatile iodine emitted from aqueous environmental samples. J Radioanal Nucl Chem 246: 337–341
Behrens, H (1982) New insights into the chemical behavior of radioiodine in aquatic environments. In: Environmental Migration of Long-Lived Radionuclides, Proceedings of an International Symposium, International Atomic Energy Agency, Vienna. pp 27–40
Bors J, Martens R (1992) The contribution of microbial biomass to the adsorption of radioiodide in soils. J Environ Radioact 15: 35–49
Buraglio N, Aldahan A, Possnert G, Vintersved I (2001) 129I from the nuclear reprocessing facilities traced in precipitation and runoff in northern Europe. Environ Sci Technol 35: 1579–1586
Cohen BL (1985) The origin of I in soil and the 129I problem. Health Phys 49: 279–285
Councell TB, Landa ER, Lovley DR (1997) Microbial reduction of iodate. Water, Air Soil Pollution 100: 99–106
Doudoroff M, Palleroni NJ (1974) Genus, I: Pseudomonas Migura 1894. In: Buchanan RE, Gibbons NE, Cowan ST, Holt JG, Liston J, Murray GE, Niven CF, Ravin AW, Stanier RY (Eds). Bergey’s Manual of Determinative Bacteriology, 8th ed, Williams & Wilkins, Baltimore, pp 217–243
Drews G, (1981) Rhodospirillum salexigens, spec. nov., an obligatory halophilic phototrophic bacterium. Arch Microbiol 130: 325–327
Farhangrazi ZS, Sinclair R, Yamazaki I, Powers LS (1992) Haloperoxidase activity of Phanerochaete chrysosporium lignin peroxidases H2 and H8. Biochemistry 31: 10763–10768
Farrenkopf AM, Dollhopf ME, Chadhain SN, Luther GW, III Nealson KH (1997) Reduction of iodate in seawater by bacterium, Shewanella putrefaciens strain MR-4. Marine Chem 57: 347–354
Fehn U, Snyder GT (2003) Origin of Iodine and 129I in Volcanic and Geothermal Fluids from the North Island of New Zealand: Impact for Subduction Zone Processes. Society of Economic Geologists Special Publication 10: 159–170
Franks SG, Dias RF, Freeman KH, Boles JR, Holba A, Fincannon AL, Jordan ED (2001) Carbon isotopic composition of organic acids in oil field waters, San Joaquin Basin, California, USA. Geochim Cosmochim Acta 65: 1301–1310
Fuge R, Johnson CC (1986) The geochemistry of iodine. Environ Geochem Health 8: 31–54
Furtmuller PG, Jantschko W, Regelsberger G, Jakopitsch C, Arnhold J, Obinger C (2002) Reaction of lactoperoxidase compound I with halides and thiocyanate. Biochemistry 41: 11895–11900
Fuse H, Inoue H, Murakami K, Takimura O, Yamaoka Y (2003) Production of free and organic iodine by Roseovarius spp. FEMS Microbiol Lett 229: 189–194
Gonzalez JM, Covert JS, Whitman WB, Henriksen JR, Mayer F, Scharf B, Schmitt R, Buchan A, Fuhrman JA, Kiene RP, Moran MA 2003. Silicibacter pomeroyi sp. nov. and Roseovarius nubinhibens sp. nov., dimethylsulfoniopropionate-demethylating bacteria from marine environments. Int J Syst Evol Microbiol 53: 1261–1269
Gozlan RS (1968) Isolation of iodine-producing bacteria from aquaria. Antonie Van Leeuwenhoek 34: 226
Gozlan RS, Margalith P (1973) Iodide oxidation by a marine bacterium. J Appl Bacteriol 36: 407–417
Gozlan RS, Margalith P (1974) Iodide oxidation by Pseudomonas iodooxidans. J Appl Bacteriol 37: 493–499
Hiraishi A (1992) Direct automated sequencing of 16S rDNA amplified by polymerase chain reaction from bacterial cultures without DNA purification. Lett Appl Microbiol 15: 210–213
Hold GL, Smith EA, Rapp MS, Maas EW, Moore ERB, Stroempl C, Stephen JR, Prosser JI, Birkbeck TH, Gallacher S (2001) Characterisation of bacterial communities associated with toxic and non-toxic dinoflagellates: Alexandrium spp. and Scrippsiella trochoidea. FEMS Microbiol Ecol 37: 161–173
Imhoff JF, Petri R, Suling J (1998) Reclassification of species of the spiral-shaped phototrophic purple non-sulfur bacteria of the alpha-Proteobacteria: description of the new genera Phaeospirillum gen. nov., Rhodovibrio gen. nov., Rhodothalassium gen. nov. and Roseospira gen. nov. as well as transfer of Rhodospirillum fulvum to Phaeospirillum fulvum comb. nov., of Rhodospirillum molischianum to Phaeospirillum molischianum comb. nov., of Rhodospirillum salinarum to Rhodovibrio salexigens. Int J Syst Bacteriol 48: 793–798
Jakopitsch C, Regelsberger G, Furtmuller PG, Ruker F, Peschek GA, Obinger C (2001) Catalase-peroxidase from Synechocystis is capable of chlorination and bromination reactions. Biochem Biophys Res Commun 287: 682–687
Labrenz M, Collins MD, Lawson PA, Tindall BJ, Schumann P, Hirsch P (1999) Roseovarius tolerans gen. nov., sp. nov., a budding bacterium with variable bacteriochlorophyll a production from hypersaline Ekho Lake. Int J Syst Bacteriol 49: 137–147
McDonnell G, Russell AD (1999) Antiseptics and disinfectants: activity, action, and resistance. Clin Microbiol Rev 12: 147–179
Moran JE, Oktay S, Santschi PH, Schink DR (1999) Atmospheric dispersal of 129iodine from nuclear fuel reprocessing facilities. Environ Sci Technol 33: 2536–2542
Muramatsu Y, Fehn U, Yoshida S (2001) Recycling of iodine in fore-arc areas: evidence from the iodine brines in Chiba, Japan. Earth Planet Sci Lett 192: 583–593
Muramatsu Y, Yoshida S (1999) Effects of microorganisms on the fate of iodine in the soil environment. Geomicrobiol J 16: 85–93
Saito N, Nei M (1987) The neighbor-joining method: a new method for reconstructing phylogenetic trees. Mol Biol Evol 4: 406–425
Tsunogai S, Sase T (1969) Formation of iodide-iodine in the ocean. Deep-Sea Res 16: 489–496
Vandecasteele CM Van, Hees M, Hardeman F, Voigt G, Howard BJ (2000) The true absorption of 131I, and its transfer to milk in cows given different stable iodine diets. J Envrion Radioactiv 47: 301–317
Weisburg WG, Barns SM, Pelletier DA, Lane DJ (1991) 16S ribosomal DNA amplification for phylogenetic study. J Bacteriol 173: 697–703
Wong GTF (1980) The stability of dissolved inorganic species of iodine in seawater. Mar Chem 9: 13–24
Wong GTF (1982) The stability of molecular iodine in seawater. Mar Chem 11: 91–95
Wong GTF (1991) The marine geochemistry of iodine. Rev Aquat Sci 4: 45–73
Wong GTF, Brewer PG (1977) The marine chemistry of iodine in anoxic basins. Geochim Cosmochim Acta 41: 151–159
Wong GTF, Zhang L-S (2003) Seasonal variations in the speciation of dissolved iodine in the Chesapeake Bay. Estuarine Coastal Shelf Sci 56: 1093–1106
Yoshida S, Muramatsu Y, Uchida S (1992) Studies on the sorption of I− (iodide) and IO −3 (iodate) onto andosols. Water, Air, and Soil Pollution 63: 321–329
Acknowledgments
We thank K. Redeker (Queen’s University of Belfast) for the critical reading of the manuscript; S. Yoshida (National Institute of Radiological Sciences, Japan) and G. Snyder (Rice University) for their valuable comments and kind suggestions throughout this study; K. Kimura (Chiba University), N. Machida (Chiba University), Y. Mishima (Chiba University), and S. Yamazaki (Tokyo Nuclear Service Co.) for their technical support. We are also grateful to the following iodine-producing companies for providing brine samples: Kanto Natural Gas Development Co., Nippoh Chemical Co., Godo-Shigen-Sangyo Co., Ise Chemical Co., Konoura Gas and Water Office, and Teikoku Oil Co. This work was made possible by research grants from the Forum on Iodine Utilization and the Hamaguchi Foundation for the Advancement of Biochemistry to S. A.
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Amachi, S., Muramatsu, Y., Akiyama, Y. et al. Isolation of Iodide-Oxidizing Bacteria from Iodide-Rich Natural Gas Brines and Seawaters. Microb Ecol 49, 547–557 (2005). https://doi.org/10.1007/s00248-004-0056-0
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DOI: https://doi.org/10.1007/s00248-004-0056-0
Keywords
- Iodine
- Iodate
- CH2I2
- Marine Broth
- Chiba Prefecture