{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,10]],"date-time":"2026-10-10T04:19:20Z","timestamp":1791605960844,"version":"4.3.4"},"reference-count":85,"publisher":"American Society for Microbiology","issue":"8","license":[{"start":{"date-parts":[[2013,4,15]],"date-time":"2013-04-15T00:00:00Z","timestamp":1365984000000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/journals.asm.org\/non-commercial-tdm-license"}],"content-domain":{"domain":["journals.asm.org"],"crossmark-restriction":true},"short-container-title":["Appl Environ Microbiol"],"published-print":{"date-parts":[[2013,4,15]]},"abstract":"<jats:title>ABSTRACT<\/jats:title>\n          <jats:p>\n            Marine ecosystems are significant sources of the powerful greenhouse gas nitrous oxide (N\n            <jats:sub>2<\/jats:sub>\n            O). A by-product of nitrification and an intermediate in the denitrification pathway, N\n            <jats:sub>2<\/jats:sub>\n            O is formed primarily in oxygen-deficient waters and sediments. We describe the isolation of a group of alphaproteobacteria from the suboxic waters of the Arabian Sea that are phylogenetically affiliated with\n            <jats:named-content content-type=\"genus-species\">Labrenzia<\/jats:named-content>\n            spp. and other denitrifiers. Quantitative PCR assays revealed that these organisms were very broadly distributed in this semienclosed ocean basin. Their biogeographical range extended from the productive, upwelling region off the Omani shelf to the clear, oligotrophic waters that are found much further south and also included the mesotrophic waters overlying the oxygen minimum zone (OMZ) in the northeastern sector of the Arabian Sea. These organisms actively expressed NosZ (N\n            <jats:sub>2<\/jats:sub>\n            O reductase, the terminal step in the denitrification pathway) within the OMZ, an established region of pelagic denitrification. They were found in greatest numbers outside the OMZ, however, and\n            <jats:italic>nosZ<\/jats:italic>\n            mRNAs were also readily detected near the base of the upper mixed layer in nutrient-poor, oxic regions. Our findings provide firm molecular evidence of a potential sink for N\n            <jats:sub>2<\/jats:sub>\n            O within well-ventilated, oceanic surface waters in this biogeochemically important region. We show that the\n            <jats:named-content content-type=\"genus-species\">Labrenzia<\/jats:named-content>\n            -like denitrifiers and their close relatives are habitual colonizers of the pseudobenthic environment provided by\n            <jats:named-content content-type=\"genus-species\">Trichodesmium<\/jats:named-content>\n            spp. We develop the conjecture that the O\n            <jats:sub>2<\/jats:sub>\n            -depleted microzones that occur within the colonies of these filamentous, diazotrophic cyanobacteria might provide unexpected niches for the reduction of nitrogen oxides in tropical and subtropical surface waters.\n          <\/jats:p>","DOI":"10.1128\/aem.03705-12","type":"journal-article","created":{"date-parts":[[2013,2,9]],"date-time":"2013-02-09T03:55:30Z","timestamp":1360382130000},"page":"2670-2681","update-policy":"https:\/\/doi.org\/10.1128\/asmj-crossmark-policy-page","source":"Crossref","is-referenced-by-count":60,"title":["Denitrifying Alphaproteobacteria from the Arabian Sea That Express\n            <i>nosZ<\/i>\n            , the Gene Encoding Nitrous Oxide Reductase, in Oxic and Suboxic Waters"],"prefix":"10.1128","volume":"79","author":[{"given":"Michael","family":"Wyman","sequence":"first","affiliation":[{"name":"Biological and Environmental Sciences, School of Natural Sciences, University of Stirling, Stirling, United Kingdom"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Sylvia","family":"Hodgson","sequence":"additional","affiliation":[{"name":"Biological and Environmental Sciences, School of Natural Sciences, University of Stirling, Stirling, United Kingdom"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Clare","family":"Bird","sequence":"additional","affiliation":[{"name":"Biological and Environmental Sciences, School of Natural Sciences, University of Stirling, Stirling, United Kingdom"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"235","reference":[{"key":"e_1_3_2_2_2","doi-asserted-by":"publisher","DOI":"10.1126\/science.1184945"},{"key":"e_1_3_2_3_2","doi-asserted-by":"publisher","DOI":"10.1038\/nature06592"},{"key":"e_1_3_2_4_2","doi-asserted-by":"publisher","DOI":"10.1126\/science.1176985"},{"key":"e_1_3_2_5_2","doi-asserted-by":"publisher","DOI":"10.1038\/23921"},{"key":"e_1_3_2_6_2","doi-asserted-by":"publisher","DOI":"10.1073\/pnas.1011053108"},{"key":"e_1_3_2_7_2","doi-asserted-by":"publisher","DOI":"10.1126\/science.1186120"},{"key":"e_1_3_2_8_2","volume-title":"Ocean acidification due to increasing atmospheric carbon dioxide. 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