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Crocosphaera watsoni.
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SYSNO ASEP 0569135 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Crocosphaera watsoni. Author(s) Masuda, T. (CZ)
Inomura, K. (US)
Mareš, Jan (BC-A) RID, ORCID
Prášil, O. (CZ)Number of authors 4 Source Title Trends in Microbiology. - : Elsevier - ISSN 0966-842X
Roč. 30, č. 8 (2022), s. 805-806Number of pages 2 s. Language eng - English Country GB - United Kingdom Keywords Crocosphaera watsonii ; photosynthesis ; cyanobacterium t Subject RIV EE - Microbiology, Virology OECD category Microbiology Method of publishing Open access Institutional support BC-A - RVO:60077344 UT WOS 000830268500009 EID SCOPUS 85126849952 DOI 10.1016/j.tim.2022.02.006 Annotation Crocosphaera watsonii is a marine unicellular cyanobacterium that fixes carbon during the day and nitrogen during the night. They are abundant in tropical and subtropical oceans, providing both bioavailable carbon and nitrogen to the ecosystem, altering local and possibly global biogeochemical cycling. The temporal segregation of nitrogen fixation from oxygenic photosynthesis helps to protect nitrogenase, the oxygen-sensitive enzyme responsible for nitrogen fixation. The diel rhythm of carbon and nitrogen fixations fluctuates the cellular carbon to nitrogen ratio. Although C. watsonii can reduce nitrogen gas into organic compounds, they also compete with other cells for extracellular combined nitrogen, such as ammonium, nitrate, and urea. C. watsonii exists as single individual cells or as multiple cells bound by extracellular polymeric substances (EPS). Even under nitrogen-fixing conditions, only a fraction of the cellular population in colonies fixes nitrogen. This intercellular functional heterogeneity is predicted to lower overall energy consumption during nitrogen fixation. Their metabolic activities are highly sensitive to temperature, constraining their niche to warm waters. Workplace Biology Centre (since 2006) Contact Dana Hypšová, eje@eje.cz, Tel.: 387 775 214 Year of Publishing 2023 Electronic address https://doi.org/10.1016/j.tim.2022.02.006
Number of the records: 1