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Electron & Biomass Dynamics of Cyanothece Under Interacting Nitrogen & Carbon Limitations

SYSNO ASEP	0542698
Document Type	J - Journal Article
R&D Document Type	Journal Article
Subsidiary J	Článek ve WOS
Title	Electron & Biomass Dynamics of Cyanothece Under Interacting Nitrogen & Carbon Limitations
Author(s)	Rabouille, S. (FR) Campbell, Douglas Andrew (MBU-M) Masuda, Takako (MBU-M)_ORCID Zavřel, Tomáš (UEK-B)_{RID, SAI, ORCID} Bernát, Gábor (MBU-M)_ORCID Polerecky, L. (NL) Halsey, K. (US) Eichner, Meri (MBU-M)_{ORCID, RID} Kotabová, Eva (MBU-M)_{RID, ORCID} Stephan, S. (DE) Lukeš, Martin (MBU-M)_ORCID Claquin, P. (FR) Bonomi-Barufi, J. (BR) Lombardi, A. T. (BR) Červený, Jan (UEK-B)_{RID, ORCID, SAI} Suggett, D. (AU) Giordano, Mario (MBU-M)_ORCID Kromkamp, J. C. (NL) Prášil, Ondřej (MBU-M)_{RID, ORCID}
Article number	617802
Source Title	Frontiers in Microbiology. - : Frontiers Research Foundation - ISSN 1664-302X Roč. 12, APR 9 2021 (2021)
Number of pages	21 s.
Language	eng - English
Country	CH - Switzerland
Keywords	Cyanothece ; Crocosphaera subtropica ; photosynthesis ; light limitation ; carbon limitation ; nitrogen fixation
Subject RIV	EE - Microbiology, Virology
OECD category	Microbiology
Subject RIV - cooperation	Global Change Research Institute - Botanics
R&D Projects	EF16_027/0007990 GA MŠMT - Ministry of Education, Youth and Sports (MEYS)
	GA20-17627S GA ČR - Czech Science Foundation (CSF)
	EF16_026/0008413 GA MŠMT - Ministry of Education, Youth and Sports (MEYS)
	GA19-00973S GA ČR - Czech Science Foundation (CSF)
Method of publishing	Open access
Institutional support	MBU-M - RVO:61388971 ; UEK-B - RVO:86652079
UT WOS	000642535100001
EID SCOPUS	85104597360
DOI	10.3389/fmicb.2021.617802
Annotation	Marine diazotrophs are a diverse group with key roles in biogeochemical fluxes linked to primary productivity. The unicellular, diazotrophic cyanobacterium Cyanothece is widely found in coastal, subtropical oceans. We analyze the consequences of diazotrophy on growth efficiency, compared to NO3--supported growth in Cyanothece, to understand how cells cope with N-2-fixation when they also have to face carbon limitation, which may transiently affect populations in coastal environments or during blooms of phytoplankton communities. When grown in obligate diazotrophy, cells face the double burden of a more ATP-demanding N-acquisition mode and additional metabolic losses imposed by the transient storage of reducing potential as carbohydrate, compared to a hypothetical N-2 assimilation directly driven by photosynthetic electron transport. Further, this energetic burden imposed by N-2-fixation could not be alleviated, despite the high irradiance level within the cultures, because photosynthesis was limited by the availability of dissolved inorganic carbon (DIC), and possibly by a constrained capacity for carbon storage. DIC limitation exacerbates the costs on growth imposed by nitrogen fixation. Therefore, the competitive efficiency of diazotrophs could be hindered in areas with insufficient renewal of dissolved gases and/or with intense phytoplankton biomass that both decrease available light energy and draw the DIC level down.
Workplace	Institute of Microbiology
Contact	Eliška Spurná, eliska.spurna@biomed.cas.cz, Tel.: 241 062 231
Year of Publishing	2022
Electronic address	https://www.frontiersin.org/articles/10.3389/fmicb.2021.617802/full

Number of the records: 1