IDEAS home Printed from https://ideas.repec.org/a/eee/ecomod/v291y2014icp121-133.html
   My bibliography  Save this article

Modelling the dynamics of carbon–nitrogen metabolism in the unicellular diazotrophic cyanobacterium Crocosphaera watsonii WH8501, under variable light regimes

Author

Listed:
  • Grimaud, Ghjuvan Micaelu
  • Rabouille, Sophie
  • Dron, Anthony
  • Sciandra, Antoine
  • Bernard, Olivier

Abstract

A dynamical model is proposed that describes the daily dynamics of diazotrophy in a unicellular cyanobacterium, Crocosphaera watsonii WH8501, in regard to light limitation and obligate diazotrophy. In this model, intracellular carbon and nitrogen are both divided into a functional pool and a storage pool. An internal pool that explicitly describes the nitrogenase enzyme is also added. The various intracellular carbon and nitrogen flows between these pools lead to a complex dynamics driven by the light regime. The model is successfully validated with continuous cultures experiments of C. watsonii under three light regimes, indicating that the proposed mechanisms accurately reproduce the growth dynamics of this organism under various light environments. Then, a series of model simulations is run for a range of light regimes with different photoperiods and daily light doses. Results reveal how nitrogen and carbon are coupled, through the diel cycle, along with nitrogenase dynamics whose activity is constrained by the light regime. In an ecological perspective, we picture the effect of such irradiance condition on growth and on the carbon to nitrogen stoichiometry on cells. This model could prove useful to understand the latitudinal distribution of this cyanobacterium in the global ocean.

Suggested Citation

  • Grimaud, Ghjuvan Micaelu & Rabouille, Sophie & Dron, Anthony & Sciandra, Antoine & Bernard, Olivier, 2014. "Modelling the dynamics of carbon–nitrogen metabolism in the unicellular diazotrophic cyanobacterium Crocosphaera watsonii WH8501, under variable light regimes," Ecological Modelling, Elsevier, vol. 291(C), pages 121-133.
    • Handle: RePEc:eee:ecomod:v:291:y:2014:i:c:p:121-133
    DOI: 10.1016/j.ecolmodel.2014.07.016
    as

    Download full text from publisher

    File URL: http://www.sciencedirect.com/science/article/pii/S0304380014003524
    Download Restriction: Full text for ScienceDirect subscribers only
    File URL: https://libkey.io/10.1016/j.ecolmodel.2014.07.016?utm_source=ideas
    LibKey link: if access is restricted and if your library uses this service, LibKey will redirect you to where you can use your library subscription to access this item
    ---><---

    As the access to this document is restricted, you may want to search for a different version of it.

    References listed on IDEAS

    as
    1. Jonathan P. Zehr & John B. Waterbury & Patricia J. Turner & Joseph P. Montoya & Enoma Omoregie & Grieg F. Steward & Andrew Hansen & David M. Karl, 2001. "Unicellular cyanobacteria fix N2 in the subtropical North Pacific Ocean," Nature, Nature, vol. 412(6847), pages 635-638, August.
    2. H. James Tripp & Shellie R. Bench & Kendra A. Turk & Rachel A. Foster & Brian A. Desany & Faheem Niazi & Jason P. Affourtit & Jonathan P. Zehr, 2010. "Metabolic streamlining in an open-ocean nitrogen-fixing cyanobacterium," Nature, Nature, vol. 464(7285), pages 90-94, March.
    Full references (including those not matched with items on IDEAS)

    Most related items

    These are the items that most often cite the same works as this one and are cited by the same works as this one.
    1. Gopi Siva Sai Tiruveedula & Pramod P Wangikar, 2017. "Gene essentiality, conservation index and co-evolution of genes in cyanobacteria," PLOS ONE, Public Library of Science, vol. 12(6), pages 1-18, June.

    Corrections

    All material on this site has been provided by the respective publishers and authors. You can help correct errors and omissions. When requesting a correction, please mention this item's handle: RePEc:eee:ecomod:v:291:y:2014:i:c:p:121-133. See general information about how to correct material in RePEc.

    If you have authored this item and are not yet registered with RePEc, we encourage you to do it here. This allows to link your profile to this item. It also allows you to accept potential citations to this item that we are uncertain about.

    If CitEc recognized a bibliographic reference but did not link an item in RePEc to it, you can help with this form .

    If you know of missing items citing this one, you can help us creating those links by adding the relevant references in the same way as above, for each refering item. If you are a registered author of this item, you may also want to check the "citations" tab in your RePEc Author Service profile, as there may be some citations waiting for confirmation.

    For technical questions regarding this item, or to correct its authors, title, abstract, bibliographic or download information, contact: Catherine Liu (email available below). General contact details of provider: http://www.journals.elsevier.com/ecological-modelling .

    Please note that corrections may take a couple of weeks to filter through the various RePEc services.

    IDEAS is a RePEc service. RePEc uses bibliographic data supplied by the respective publishers.