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Genomic and metatranscriptomic analyses of carbon remineralization in an Antarctic polynya

Cited 9 time in wos
Cited 10 time in scopus

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dc.contributor.authorKim, So-Jeong-
dc.contributor.authorKim, Jong-Geol-
dc.contributor.authorLee, Sang Hoon-
dc.contributor.authorPark, Soo-Je-
dc.contributor.authorGwak, Joo-Han-
dc.contributor.authorJung, Man-Young-
dc.contributor.authorChung, Won-Hyung-
dc.contributor.authorYang, Eun Jin-
dc.contributor.authorPark, Jisoo-
dc.contributor.authorJung, Jinyoung-
dc.contributor.authorHahn, Yoonsoo-
dc.contributor.authorCho, Jang-Cheon-
dc.contributor.authorMadsen, Eugene L.-
dc.contributor.authorRodriguez-Valera, Francisco-
dc.contributor.authorHyun, Jung-Ho-
dc.contributor.authorRhee, Sung-Keun-
dc.date.accessioned2020-10-21T00:50:21Z-
dc.date.available2020-10-21T00:50:21Z-
dc.date.issued2019-02-
dc.identifier.urihttps://repository.kopri.re.kr/handle/201206/10950-
dc.description.abstractPolynyas in the Southern Ocean are regions of intense primary production, mainly by Phaeocystis antarctica. Carbon fixed by phytoplankton in the water column is transferred to higher trophic levels, and finally, to the deep ocean. However, in the Amundsen Sea, most of this organic carbon does not reach the sediment but is degraded in the water column due to high bacterial heterotrophic activity. We reconstructed 12 key bacterial genomes from different phases of bloom and analyzed the expression of genes involved in organic carbon remineralization. A high correlation of gene expression between the peak and decline phases was observed in an individual genome bin-based pairwise comparison of gene expression. Polaribacter belonging to Bacteroidetes was found to be dominant in the peak phase, and its transcriptional activity was high (48.9% of the total mRNA reads). Two dominant Polaribacter bins had the potential to utilize major polymers in P. antarctica, chrysolaminarin and xylan, with a distinct set of glycosyl hydrolases. In the decline phase, Gammaproteobacteria (Ant4D3, SUP05, and SAR92), with the potential to utilize low molecular weight-dissolved organic matter (LMW-DOM) including compatible solutes, was increased. The versatility of Gammaproteobacteria may contribute to their abundance in organic carbon-rich polynya waters, while the SAR11 clade was found to be predominant in the sea ice-covered oligotrophic ocean. SAR92 clade showed transcriptional activity for utilization of both polysaccharides and LMW-DOM; this may account for their abundance both in the peak and decline phases. Ant4D3 clade was dominant in all phases of the polynya bloom, implicating the crucial roles of this clade in LMWDOM remineralization in the Antarctic polynyas. Genomic reconstruction and in situ gene expression analyses revealed the unique metabolic potential of dominant bacteria of the Antarctic polynya at a finer taxonomic level. The information can be used to predict temporal community succession linked to the availability of substrates derived from the P. antarctica bloom. Global warming has resulted in compositional changes in phytoplankton from P. antarctica to diatoms, and thus, repeated parallel studies in various polynyas are required to predict global warming-related changes in carbon remineralization.en_US
dc.languageEnglishen_US
dc.language.isoenen_US
dc.subjectMicrobiologyen_US
dc.subject.classificationAraonen_US
dc.titleGenomic and metatranscriptomic analyses of carbon remineralization in an Antarctic polynyaen_US
dc.title.alternative남극 폴리냐에서의 탄소 재광물화에 대한 게놈과 메타전사체 해석en_US
dc.typeArticleen_US
dc.identifier.bibliographicCitationKim, So-Jeong, et al. 2019. "Genomic and metatranscriptomic analyses of carbon remineralization in an Antarctic polynya". <em>MICROBIOME</em>, 7(29): 1-15.-
dc.citation.titleMICROBIOMEen_US
dc.citation.volume7en_US
dc.citation.number29en_US
dc.identifier.doi10.1186/s40168-019-0643-4-
dc.citation.startPage1en_US
dc.citation.endPage15en_US
dc.description.articleClassificationSCIE-
dc.description.jcrRateJCR 2017:7.937en_US
dc.subject.keywordCarbon remineralizationen_US
dc.subject.keywordGenomicsen_US
dc.subject.keywordMetatranscriptomicsen_US
dc.subject.keywordPolynyaen_US
dc.identifier.localId2019-0234-
dc.identifier.scopusid2-s2.0-85061964917-
dc.identifier.wosid000459563300001-
Appears in Collections  
2019-2019, Ocean-to-Ice Interactions in Amundsen Sea: Ice shelf melting and its impact on ocean processes (19-19) / Kim, Tae-Wan (PE19060)
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