SEARCH

SEARCH BY CITATION

  • Bench, S. R., Heller, P., Frank, I., Arciniega, M., Shilova, I. N. & Zehr, J. P. 2013. Whole genome comparison of six Crocosphaera watsonii strains with differing phenotypes. J. Phycol. 49:786801.
  • Bench, S. R., Ilikchyan, I. N., Tripp, H. J. & Zehr, J. P. 2011. Two strains of Crocosphaera watsonii with highly conserved genomes are distinguished by strain-specific features. Front. Microbiol. 2:261.
  • Bergman, B. & Carpenter, E. J. 1991. Nitrogenase confined to randomly distributed trichomes in the marine cyanobacterium Trichodesmium thiebautii. J. Phycol. 27:15865.
  • Bergman, B., Sandh, G., Lin, S., Larsson, J. & Carpenter, E. J. 2012. Trichodesmium – a widespread marine cyanobacterium with unusual nitrogen fixation properties. FEMS Microbiol. Rev. 37:286302.
  • Berman-Frank, I., Lundgren, P., Chen, Y. B., Küpper, H., Kolber, Z., Bergman, B. & Falkowski, P. 2001. Segregation of nitrogen fixation and oxygenic photosynthesis in the marine cyanobacterium trichodesmium. Science 294:15347.
  • Biegala, I. & Raimbault, P. 2008. High abundance of diazotrophic picocyanobacteria (<3 μm) in a Southwest Pacific coral lagoon. Aquat. Microbiol. Ecol. 51:4553.
  • Bonnet, S., Biegala, I. C., Dutrieux, P., Slemons, L. O. & Capone, D. G. 2009. Nitrogen fixation in the western equatorial Pacific: rates, diazotrophic cyanobacterial size class distribution, and biogeochemical significance. Global Biogeochem. Cy. 23:GB3012.
  • Bothe, H., Tripp, H. & Zehr, J. 2010. Unicellular cyanobacteria with a new mode of life: the lack of photosynthetic oxygen evolution allows nitrogen fixation to proceed. Arch. Microbiol. 192:78390.
  • Campbell, L., Liu, H., Nolla, H. A. & Vaulot, D. 1997. Annual variability of phytoplankton and bacteria in the subtropical North Pacific Ocean at Station ALOHA during the 1991–1994 ENSO event. Deep Sea Res. I 44:16792.
  • Capone, D. G., Burns, J. A., Montoya, J. P., Subramaniam, A., Mahaffey, C., Gunderson, T., Michaels, A. F. et al. 2005. Nitrogen fixation by Trichodesmium spp.: an important source of new nitrogen to the tropical and subtropical North Atlantic Ocean. Global Biogeochem. Cy. 19:GB2024.
  • Capone, D. G., Zehr, J. P., Paerl, H. W., Bergman, B. & Carpenter, E. J. 1997. Trichodesmium, a globally significant marine cyanobacterium. Science 276:12219.
  • Carpenter, E. J. 1972. Nitrogen fixation by a blue-green epiphyte on pelagic Sargassum. Science 178:12079.
  • Carpenter, E. J. 1983. Physiology and ecology of marine planktonic Oscillatoria (Trichodesmium). Mar. Biol. Lett. 4:6985.
  • Carpenter, E. J. & Capone, D. G. 2008. Nitrogen fixation in the marine environment. In: Capone, D. G., Bronk, D. A., Mulholland, M. R. & Carpenter, E. J. [Eds.] Nitrogen in the Marine Environment. Elsevier, San Diego, California, pp. 14197.
  • Carpenter, E. J., Chang, J., Cottrell, M., Schubauer, J., Paerl, H. W., Bebout, B. M. & Capone, D. G. 1990. Re-evaluation of nitrogenase oxygen-protective mechanisms in the planktonic marine cyanobacterium Trichodesmium. Mar. Ecol. Prog. Ser. 65:1518.
  • Carpenter, E. J. & Janson, S. 2000. Intracellular cyanobacterial symbionts in the marine diatom Climacodium frauenfeldianum (Bacillariophyceae). J. Phycol. 36:5404.
  • Carpenter, E. & McCarthy, J. 1975. Nitrogen fixation and uptake of combined nitrogenous nutrients by Oscillatoria (Trichodesmium) thiebautii in the western Sargasso Sea. Limnol. Oceanogr. 20:389401.
  • Church, M. J., Jenkins, B. D., Karl, D. M. & Zehr, J. P. 2005a. Vertical distributions of nitrogen-fixing phylotypes at Stn Aloha in the oligotrophic North Pacific Ocean. Aquat. Microb. Ecol. 38:314.
  • Church, M. J., Mahaffey, C., Letelier, R. M., Lukas, R., Zehr, J. P. & Karl, D. M. 2009. Physical forcing of nitrogen fixation and diazotroph community structure in the North Pacific subtropical gyre. Global Biogeochem. Cy. 23:GB2020.
  • Church, M. J., Short, C. M., Jenkins, B. D., Karl, D. M. & Zehr, J. P. 2005b. Temporal patterns of nitrogenase gene (nifH) expression in the oligotrophic North Pacific Ocean. Appl. Environ. Microbiol. 71:536270.
  • Coleman, M. L., Sullivan, M. B., Martiny, A. C., Steglich, C., Barry, K., DeLong, E. F. & Chisholm, S. W. 2006. Genomic islands and the ecology and evolution of Prochlorococcus. Science 311:176870.
  • Davis, C. S. & McGillicuddy, D. J. 2006. Transatlantic abundance of the N2-fixing colonial cyanobacterium Trichodesmium. Science 312:151720.
  • Dron, A., Rabouille, S., Claquin, P., Le Roy, B., Talec, A. & Sciandra, A. 2012. Light–dark (12:12) cycle of carbon and nitrogen metabolism in Crocosphaera watsonii WH8501: relation to the cell cycle. Environ. Microbiol. 14:96781.
  • Dugdale, R., Dugdale, V., Neess, J. & Soering, J. 1959. Nitrogen fixation in lakes. Science 130:85960.
  • Dugdale, R. C., Goering, J. J. & Ryther, J. H. 1964. High nitrogen fixation rates in the Sargasso Sea and the Arabian Sea. Limnol. Oceanogr. 9:50710.
  • Dugdale, R. C., Menzel, D. W. & Ryther, J. H. 1961. Nitrogen fixation in the Sargasso Sea. Deep-Sea Res. 7:297300.
  • Dyhrman, S. T. & Haley, S. T. 2006. Phosphorus scavenging in the unicellular marine diazotroph Crocosphaera watsonii. App. Environ. Microb. 72:14528.
  • Ehrenberg, E. 1830. Neue beobachtungen über blauartige erscheinungen in Aegypten und Siberien nebst einer Ubersicht und Kritik der früher bekannten. Ann. Phys. Chem. 18:477514.
  • El-Shehawy, R., Lugomela, C., Ernst, A. & Bergman, B. 2003. Diurnal expression of hetR and diazocyte development in the filamentous non-heterocystous cyanobacterium Trichodesmium erythraeum. Microbiology 149:113946.
  • Falcón, L. I., Cipriano, F., Chistoserdov, A. Y. & Carpenter, E. J. 2002. Diversity of diazotrophic unicellular cyanobacteria in the tropical North Atlantic ocean. App. Environ. Microb. 68:57604.
  • Fay, P., Stewart, W. D. P., Walsby, A. E. & Fogg, G. E. 1968. Is the heterocyst the site of nitrogen fixation in blue-green algae? Nature 220:8102.
  • Finzi-Hart, J. A., Pett-Ridge, J., Weber, P. K., Popa, R., Fallon, S. J., Gunderson, T., Hutcheon, I. D. et al. 2009. Fixation and fate of C and N in the cyanobacterium Trichodesmium using nanometer-scale secondary ion mass spectrometry. Proc. Natl Acad. Sci. USA 106:634550.
  • Foster, R. A., Carpenter, E. J. & Bergman, B. 2006. Unicellular cyanobionts in open ocean dinoflagellates, radiolarians, and tintinnids: ultrastructural characterization and immuno-localization of phycoerythrin and nitrogenase. J. Phycol. 42:45363.
  • Foster, R. A., Goebel, N. L. & Zehr, J. P. 2010. Isolation of Calothrix rhizosoleniae (Cyanobacteria) Strain SC01 from Chaetoceros (Bacillariophyta) spp. diatoms of the subtropical North Pacific Ocean. J. Phycol. 46:102837.
  • Foster, R. A., Kuypers, M. M. M., Vagner, T., Paerl, R. W., Musat, N. & Zehr, J. P. 2011. Nitrogen fixation and transfer in open ocean diatom-cyanobacterial symbioses. ISME J. 5:148493.
  • Foster, R. A., Subramaniam, A., Mahaffey, C., Carpenter, E. J., Capone, D. G. & Zehr, J. P. 2007. Influence of the Amazon River plume on distributions of free-living and symbiotic cyanobacteria in the Western Tropical North Atlantic Ocean. Limnol. Oceanogr. 52:51732.
  • Foster, R. A., Sztejrenszus, S. & Kuypers, M. M. M. 2013. Measuring carbon and N2 fixation in field populations of colonial and free-living unicellular cyanobacteria using nanometer-scale secondary ion mass spectrometry. J. Phycol. 49:50216.
  • Fredriksson, C. & Bergman, B. 1997. Ultrastructural characterisation of cells specialised for nitrogen fixation in a non-heterocystous cyanobacterium, trichodesmium spp. Protoplasma 197:7685.
  • Goebel, N. L., Edwards, C. A., Carter, B. J., Achilles, K. M. & Zehr, J. P. 2008. Growth and carbon content of three different-sized diazotrophic cyanobacteria observed in the subtroptical North Pacific. J. Phycol. 44:121220.
  • Goering, J. J., Dugdale, R. C. & Menzel, D. W. 1966. Estimates of in situ rates of nitrogen uptake by Trichodesmium sp. in the tropical Atlantic ocean. Limnol. Oceanogr. 11:61420.
  • Hamisi, M., Lyimo, T., Muruke, M. & Bergman, B. 2009. Nitrogen fixation by epiphytic and epibenthic diazotrophs associated with seagrass meadows along the Tanzanian coast, Western Indian Ocean. Aq. Microb. Ecol. 57:3342.
  • Hewson, I., Poretsky, R. S., Beinart, R. A., White, A. E., Shi, T., Bench, S. R., Moisander, P. H. et al. 2009a. In situ transcriptomic analysis of the globally important keystone N2-fixing taxon Crocosphaera watsonii. ISME J. 3:61831.
  • Hewson, I., Poretsky, R. S., Dyhrman, S. T., Zielinski, B., White, A. E., Tripp, H. J., Montoya, J. P. et al. 2009b. Microbial community gene expression within colonies of the diazotroph, trichodesmium, from the Southwest Pacific Ocean. ISME J. 3:1286300.
  • Hilton, J. A., Foster, R. A., Tripp, H. J., Carter, B. J., Zehr, J. P. & Villareal, T. A. 2013. Genomic deletions disrupt nitrogen metabolism pathways of a cyanobacterial diatom symbiont. Nat. Commun. 4:1767.
  • Hmelo, L., Mooy, B. V. & Mincer, T. 2012. Characterization of bacterial epibionts on the cyanobacterium trichodesmium. Aquat. Micro. Ecol. 67:114.
  • Janson, S., Wouters, J., Bergman, B. & Carpenter, E. J. 1999. Host specificity in the richelia–diatom symbiosis revealed by hetR gene sequence analysis. Environ. Microb. 1:4318.
  • Karl, D. M., Church, M. J., Dore, J. E., Letelier, R. M. & Mahaffey, C. 2012. Predictable and efficient carbon sequestration in the North Pacific Ocean supported by symbiotic nitrogen fixation. Proc. Natl Acad. Sci. USA 109:18429.
  • Karl, D., Letelier, R., Tupas, L., Dore, J., Christian, J. & Hebel, D. 1997. The role of nitrogen fixation in biogeochemical cycling in the subtropical North Pacific Ocean. Nature 388:5338.
  • Kemp, A. E. S. & Villareal, T. A. 2013. High diatom production and export in stratified waters - a potential negative feedback to global warming. Prog. Oceanogr. [Epub ahead of print]
  • Krupke, A., Musat, N., LaRoche, J., Mohr, W., Fuchs, B. M., Amann, R. I., Kuypers, M. M. M. et al. 2013. In situ identification and N2 and C fixation rates of uncultivated cyanobacteria populations. Syst. Appl. Microbiol. 36:25971.
  • Küpper, H., Ferimazova, N., Šetlík, I. & Berman-Frank, I. 2004. Traffic lights in Trichodesmium. Regulation of photosynthesis for nitrogen fixation studied by chlorophyll fluorescence kinetic microscopy. Plant Physiol. 135:212033.
  • Küpper, H., Setlik, I., Trtilek, M. & Nedbal, L. 2000. A microscope for two-dimensional measurements of in vivo chlorophyll fluorescence kinetics using pulsed measuring radiation, continuous actinic radiation, and saturating flashes. Photosynthetica 38:55370.
  • Langlois, R. J., Hümmer, D. & LaRoche, J. 2008. Abundances and distributions of the dominant nifH phylotypes in the Northern Atlantic Ocean. App. Environ. Microbiol. 74:192231.
  • Langlois, R. J., LaRoche, J. & Raab, P. A. 2005. Diazotrophic diversity and distribution in the tropical and subtropical Atlantic Ocean. App. Environ. Microbiol. 71:79109.
  • Larsson, J., Nylander, J. & Bergman, B. 2011. Genome fluctuations in cyanobacteria reflect evolutionary, developmental and adaptive traits. BMC Evol. Biol. 11:187.
  • Lemmerman, E. 1905. Sandwich-Islen. Ergebnisse einer Reise nach dem Pacific. H. Schauinsland 1896 ⁄ 97. Bot. Jahrb. Syst. Pflanzengesch. Planzengeogr. 34:60763.
  • Letelier, R. M. & Karl, D. M. 1998. Trichodesmium spp. physiology and nutrient fluxes in the North Pacific subtropical gyre. Aquat. Micro. Ecol. 15:26576.
  • Lin, S., Henze, S., Lundgren, P., Bergman, B. & Carpenter, E. J. 1998. Whole-cell immunolocalization of nitrogenase in marine diazotrophic cyanobacteria, Trichodesmium spp. Appl. Environ. Microbiol. 64:30528.
  • Lipschultz, F. & Owens, N. P. 1996. An assessment of nitrogen fixation as a source of nitrogen to the North Atlantic Ocean. Biogeochemistry 35:26174.
  • Mague, T. H., Weare, N. M. & Holm-Hansen, O. 1974. Nitrogen fixation in the North Pacific Ocean. Mar. Biol. 24:10919.
  • Man-Aharonovich, D., Kress, N., Zeev, E. B., Berman-Frank, I. & Béjà, O. 2007. Molecular ecology of nifH genes and transcripts in the eastern Mediterranean Sea. Environ. Microb. 9:235463.
  • Mazard, S. L., Fuller, N. J., Orcutt, K. M., Bridle, O. & Scanlan, D. J. 2004. PCR Analysis of the distribution of unicellular cyanobacterial diazotrophs in the Arabian Sea. App. Environ. Microbiol. 70:735564.
  • Mes, T. H. M. & Doeleman, M. 2006. Positive Selection on transposase genes of insertion sequences in the Crocosphaera watsonii genome. J. Bact. 188:717685.
  • Moal, M. L. & Biegala, I. 2009. Diazotrophic unicellular cyanobacteria in the northwestern Mediterranean Sea: a seasonal cycle. Limnol. Oceanogr. 54:84555.
  • Moisander, P. H., Beinart, R. A., Hewson, I., White, A. E., Johnson, K. S., Carlson, C. A., Montoya, J. P. et al. 2010. Unicellular cyanobacterial distributions broaden the oceanic N2 fixation domain. Science 327:15124.
  • Montoya, J. P., Holl, C. M., Zehr, J. P., Hansen, A., Villareal, T. A. & Capone, D. G. 2004. High rates of N2 fixation by unicellular diazotrophs in the oligotrophic Pacific Ocean. Nature 430:102732.
  • Nausch, M. 1996. Microbial activities on Trichodesmium colonies. Mar. Ecol. Prog. Ser. 141:17381.
  • Needoba, J. A., Foster, R. A., Sakamoto, C., Zehr, J. P. & Johnson, K. S. 2007. Nitrogen fixation by unicellular diazotrophic cyanobacteria in the temperate oligotrophic North Pacific Ocean. Limnol. Oceanogr. 52:131727.
  • Neveux, J., Lantoine, F., Vaulot, D., Marie, D. & Blanchot, J. 1999. Phycoerythrins in the southern tropical and equatorial Pacific Ocean - Evidence for new cyanobacterial types. J. Geophys. Res. 104:331121.
  • Norris, R. E. 1961. Observations on phytoplankton organisms collected on the NZOI Pacific cruise, September 1958. N.Z. J. Sci. 4:16288.
  • Ohki, K. 2008. Intercellular localization of nitrogenase in a non-heterocystous cyanobacterium (cyanophyte), Trichodesmium sp. NIBB1067. J. Oceanogr. 64:2116.
  • Ohki, K. & Fujita, Y. 1988. Aerobic nitrogenase activity measured as acetylene reduction in the marine non-heterocystous cyanobacterium Trichodesmium spp. grown under artificial conditions. Mar. Biol. 98:1114.
  • Ohki, K. & Taniuchi, Y. 2009. Detection of nitrogenase in individual cells of a natural population of trichodesmium using immunocytochemical methods for fluorescent cells. J. Oceanogr. 65:42732.
  • Omoregie, E. O., Crumbliss, L. L., Bebout, B. M. & Zehr, J. P. 2004. Determination of nitrogen-fixing phylotypes in Lyngbya sp. and Microcoleus chthonoplastes cyanobacterial mats from Guerrero Negro, Baja California. Mexico. App. Environ. Microbiol. 70:211928.
  • Paerl, H. W. 1994. Spatial segregation of CO2 fixation in Trichodesmium spp.: linkage to N2 fixation potential. J. Phycol. 30:7909.
  • Paerl, H. W. & Bebout, B. M. 1988. Direct measurement of O2-depleted microzones in marine Oscillatoria: relation to N2 fixation. Science 241:4425.
  • Paerl, H. W., Bebout, B. M. & Prufert, L. E. 1989a. Bacterial associations with marine Oscillatoria sp. (Trichodesmium sp.) populations: ecophysiological implications. J. Phycol. 25:77384.
  • Paerl, H. W., Priscu, J. C. & Brawner, D. L. 1989b. Immunochemical localization of nitrogenase in marine Trichodesmium aggregates: relationship to N2 fixation potential. App. Environ. Microbiol. 55:296575.
  • Ramamurthy, V. D. 1968. Studies on phytoplankton in Porto Novo Waters with special reference to Trichodesmium erythraeum. PhD, Annamalai University.
  • Ramamurthy, V. D. & Krishnamurthy, S. 1967. Effects of N:P ratios on the uptake of nitrate and phosphate by laboratory cultures of Trichodesmium erythraeum (Ehr.). P. Indian Acad. Sci. B 65:438.
  • Rees, A. P., Gilbert, J. A. & Kelly-Gerreyn, B. A. 2009. Nitrogen fixation in the western English Channel (NE Atlantic Ocean). Mar. Ecol. Prog. Ser. 374:712.
  • Rocap, G., Distel, D. L., Waterbury, J. B. & Chisholm, S. W. 2002. Resolution of Prochlorococcus and Synechococcus ecotypes by using 16S-23S Ribosomal DNA internal transcribed spacer sequences. App. Environ. Microbiol. 68:118091.
  • Rubin, M., Berman-Frank, I. & Shaked, Y. 2011. Dust- and mineral-iron utilization by the marine dinitrogen-fixer Trichodesmium. Nat. Geosci. 4:52934.
  • Saino, T. & Hattori, A. 1978. Diel variation in nitrogen fixation by a marine blue-green alga, Trichodesmium thiebautii. Deep-Sea Res. 25:125963.
  • Sandh, G., Xu, L. & Bergman, B. 2012. Diazocyte development in the marine diazotrophic cyanobacterium Trichodesmium. Microbiology 158:34552.
  • Sheridan, C. C., Steinberg, D. K. & Kling, G. W. 2002. The microbial and metazoan community associated with colonies of Trichodesmium spp.: a quantitative survey. J. Plankton Res. 24:91322.
  • Shi, T., Ilikchyan, I., Rabouille, S. & Zehr, J. P. 2010. Genome-wide analysis of diel gene expression in the unicellular N2-fixing cyanobacterium Crocosphaera watsonii WH 8501. ISME J. 4:62132.
  • Short, S. M. & Zehr, J. P. 2007. Nitrogenase gene expression in the Chesapeake Bay Estuary. Enviro. Microb. 9:15916.
  • Sohm, J. A., Edwards, B. R., Wilson, B. G. & Webb, E. A. 2011. Constitutive extracellular polysaccharide (EPS) production by specific isolates of Crocosphaera watsonii. Front. Microb. 2:Article No. 229.
  • Sournia, A. 1968. La cyanophycee Oscillatoria (Trichodesmium) dans la planton marine: taxanomic, et observations sand le canae de Mozambique. Nova Hedwigia 15:112.
  • Sournia, A. 1970. Les cyanophycees dans le plancton marin. Ann. Biol. 9:6376.
  • Stewart, W. D. 1973. Nitrogen fixation by photosynthetic organisms. Annu. Rev. Microbiol. 27:283316.
  • Taniuchi, Y., Chen, Y. L. L., Chen, H. Y., Tsai, M. L. & Ohki, K. 2012. Isolation and characterization of the unicellular diazotrophic cyanobacterium Group C TW3 from the tropical western Pacific Ocean. Environ. Microb. 14:64154.
  • Taylor, B., Lee, C. & Bunt, J. 1973. Nitrogen-fixation associated with the marine blue-green alga, Trichodesmium, as measured by the acetylene-reduction technique. Archiv für Mikrobiologie 88:20512.
  • Thompson, A. W., Foster, R. A., Krupke, A., Carter, B. J., Musat, N., Vaulot, D., Kuypers, M. M. M. et al. 2012. Unicellular cyanobacterium symbiotic with a single-celled eukaryotic alga. Science 337:154650.
  • Thorneley, R. N. & Ashby, G. A. 1989. Oxidation of nitrogenase iron protein by dioxygen without inactivation could contribute to high respiration rates of Azotobacter species and facilitate nitrogen fixation in other aerobic environments. Biochem. J. 261:1817.
  • Tomas, C. 1997. Identifying Marine Phytoplankton. Academic Press, San Diego, CA.
  • Tripp, H. J., Bench, S. R., Turk, K. A., Foster, R. A., Desany, B. A., Niazi, F., Affourtit, J. P. et al. 2010. Metabolic streamlining in an open-ocean nitrogen-fixing cyanobacterium. Nature 464:904.
  • Van Mooy, B. A. S., Hmelo, L. R., Sofen, L. E., Campagna, S. R., May, A. L., Dyhrman, S. T., Heithoff, A. et al. 2012. Quorum sensing control of phosphorus acquisition in Trichodesmium consortia. ISME J. 6:4229.
  • Villareal, T. A. & Carpenter, E. J. 1990. Diel buoyancy regulation in the marine diazotrophic cyanobacterium. Limnol. Oceanogr. 35:18327.
  • Villareal, T. A. & Carpenter, E. J. 2003. Buoyancy regulation and the potential for vertical migration in the oceanic cyanobacterium Trichodesmium. Microb. Ecol. 45:110.
  • Waterbury, J. & Rippka, R. 1989. Section 19. Oxygenic photosynthetic bacteria. In Staley, J. T. Bergey's Manual of Systematic Bacteriology, vol. 3. Williams and Wilkins, Baltimore, pp. 1742.
  • Waterbury, J., Watson, S. & Valois, F. 1988. Temporal separation of photosynthesis and dinitrogen fixation in the marine unicellular cyanobacterium Erythrosphaera marin. EOS 69:1089
  • Webb, E. A., Ehrenreich, I. M., Brown, S. L., Valois, F. W. & Waterbury, J. B. 2009. Phenotypic and genotypic characterization of multiple strains of the diazotrophic cyanobacterium, Crocosphaera watsonii, isolated from the open ocean. Environ. Microbiol. 11:33848.
  • White, A. E., Spitz, Y. H. & Letelier, R. M. 2006. Modeling carbohydrate ballasting by Trichodesmium spp. Mar. Ecol. Prog. Ser. 323:3545.
  • Wille, N. 1904. Die Schizophyceen der Plankton Expedition. Ergeb. Humbolt-Stift 4:188.
  • Zehr, J. P. 2011. Nitrogen fixation by marine cyanobacteria. Trends Microbiol. 19:16273.
  • Zehr, J. P., Bench, S. R., Carter, B. J., Hewson, I., Niazi, F., Shi, T., Tripp, H. J. et al. 2008. Globally distributed uncultivated oceanic N2-Fixing cyanobacteria lack oxygenic photosystem II. Science 322:11102.
  • Zehr, J. P., Bench, S. R., Mondragon, E. A., McCarren, J. & DeLong, E. F. 2007a. Low genomic diversity in tropical oceanic N2-fixing cyanobacteria. Proc. Natl Acad. Sci. USA 104:1780712.
  • Zehr, J. P., Braun, S., Chen, Y. & Mellon, M. 1996. Nitrogen fixation in the marine environment: relating genetic potential to nitrogenase activity. J. Exp. Mar. Biol. Ecol. 203:6173.
  • Zehr, J. P. & Capone, D. G. 1996. Problems and promises of assaying the genetic potential for nitrogen fixation in the marine environment. Microb. Ecol. 32:26381.
  • Zehr, J. P. & McReynolds, L. A. 1989. Use of degenerate oligonucleotides for amplification of the nifH gene from the marine cyanobacterium Trichodesmium thiebautii. App. Environ. Microbiol. 55:25226.
  • Zehr, J. P., Mellon, M. T. & Zani, S. 1998. New nitrogen-fixing microorganisms detected in oligotrophic oceans by amplification of nitrogenase (nifH) genes. App. Environ. Microbiol. 64:344450.
  • Zehr, J. P., Montoya, J. P., Jenkins, B. D., Hewson, I., Mondragon, E., Short, C. M., Church, M. J. et al. 2007b. Experiments linking nitrogenase gene expression to nitrogen fixation in the North Pacific subtropical gyre. Limnol. Oceanogr. 52:16983.
  • Zehr, J. P., Waterbury, J. B., Turner, P. J., Montoya, J. P., Omoregie, E., Steward, G. F., Hansen, A. et al. 2001. Unicellular cyanobacteria fix N2 in the subtropical North Pacific Ocean. Nature 412:6358.