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

ABSTRACT: 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 N₂-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, compar

SUBMITTER: Rabouille S 

PROVIDER: S-EPMC8063122 | biostudies-literature | 2021

REPOSITORIES: biostudies-literature