Počet záznamů: 1

Combined Effects of CO2 and Light on the N-2-Fixing Cyanobacterium Trichodesmium IMS101: A Mechanistic View

  1. 1.
    0352855 - MBU-M 2011 RIV US eng J - Článek v odborném periodiku
    Levitan, O. - Kranz, S. A. - Spungin, D. - Prášil, Ondřej - Rost, B. - Berman-Frank, I.
    Combined Effects of CO2 and Light on the N-2-Fixing Cyanobacterium Trichodesmium IMS101: A Mechanistic View.
    Plant Physiology. Roč. 154, č. 1 (2010), s. 346-356 ISSN 0032-0889
    Grant CEP: GA ČR GA206/08/1683
    Výzkumný záměr: CEZ:AV0Z50200510
    Klíčová slova: cyanobacterium Trichodesmium * ocean * photosystem I
    Kód oboru RIV: EE - Mikrobiologie, virologie
    Impakt faktor: 6.451, rok: 2010

    We examined the combined influence of pCO2 and light on Trichodesmium IMS101. We investigated changes in the photosynthetic fluorescence parameters of photosystem II, in ratios of the photosynthetic units (photosystem I:photosystem II), and in the pool sizes of key proteins involved in the fixation of carbon and nitrogen as well as their subsequent assimilation. We show that the combined elevation in pCO2 and light controlled the operation of the CO2-concentrating mechanism and enhanced protein activity without increasing their pool size. Moreover, elevated pCO2 and high light decreased the amounts of several key proteins (NifH, PsbA, and PsaC), while amounts of AtpB and RbcL did not significantly change. Reduced investment in protein biosynthesis, without notably changing photosynthetic fluxes, could free up energy that can be reallocated to increase N2 fixation and growth at elevated pCO2 and light
    Trvalý link: http://hdl.handle.net/11104/0192260