Heterogeneous nitrogen fixation rates confer energetic advantage and expanded ecological niche of unicellular diazotroph populations

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61388971%3A_____%2F20%3A00524918" target="_blank" >RIV/61388971:_____/20:00524918 - isvavai.cz</a>

Alternative codes found

RIV/86652079:_____/20:00524517

Result on the web

<a href="https://www.nature.com/articles/s42003-020-0894-4" target="_blank" >https://www.nature.com/articles/s42003-020-0894-4</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1038/s42003-020-0894-4" target="_blank" >10.1038/s42003-020-0894-4</a>

Result language

angličtina

Original language name

Heterogeneous nitrogen fixation rates confer energetic advantage and expanded ecological niche of unicellular diazotroph populations

Original language description

Nitrogen fixing plankton provide nitrogen to fuel marine ecosystems and biogeochemical cycles but the factors that constrain their growth and habitat remain poorly understood. Here we investigate the importance of metabolic specialization in unicellular diazotroph populations, using laboratory experiments and model simulations. In clonal cultures of Crocosphaera watsonii and Cyanothece sp. spiked with N-15(2), cellular N-15 enrichment developed a bimodal distribution within colonies, indicating that N-2 fixation was confined to a subpopulation. In a model of population metabolism, heterogeneous nitrogen (N-2) fixation rates substantially reduce the respiration rate required to protect nitrogenase from O-2. The energy savings from metabolic specialization is highest at slow growth rates, allowing populations to survive in deeper waters where light is low but nutrients are high. Our results suggest that heterogeneous N-2 fixation in colonies of unicellular diazotrophs confers an energetic advantage that expands the ecological niche and may have facilitated the evolution of multicellular diazotrophs.nnTakako Masuda et al. show that individual cells in clonal populations of Crocosphaera watsonii and Cyanothece sp exhibit varied nitrogen fixation rates. This heterogeneity within the population decreases the energetic cost of respiration and expands the viable habitats for these unicellular diazotrophs.

Czech name

—

Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

10602 - Biology (theoretical, mathematical, thermal, cryobiology, biological rhythm), Evolutionary biology

Project

Result was created during the realization of more than one project. More information in the Projects tab.

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2020

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Communications Biology

ISSN

2399-3642

e-ISSN

—

Volume of the periodical

3

Issue of the periodical within the volume

1

Country of publishing house

GB - UNITED KINGDOM

Number of pages

12

Pages from-to

172

UT code for WoS article

000527935300001

EID of the result in the Scopus database

2-s2.0-85083460648