The evolution of photosynthesis and chloroplasts

Lars Olof Björn, Govindjee Govindjee

    Forskningsoutput: TidskriftsbidragÖversiktsartikelPeer review

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    Sammanfattning

    This review focuses on what has been learned about the
    evolution of photosynthesis in the past five years, and
    omits evolution of CO2 assimilation. Oxygenic photosynthesis
    (using both photosystems I and II) has evolved
    from anoxygenic photosynthesis. The latter occurs in
    different variants, using either a type 1 photosystem
    resembling photosystem I, or a type 2 photosystem resembling
    photosystem II. Opinions differ as to how
    two types of photosystem came to be combined in the
    same organism, whether by gene transfer between bacteria,
    by fusion of bacteria, or as a result of gene duplication
    and evolution within one kind of bacterium.
    There are also different opinions about when oxygenic
    photosynthesis arose, in conjunction with the Great
    Oxygenation Event, 2.3 billion years before the present,
    or more than a billion years before that.
    Cyanobacteria were the first organisms to carry out
    oxygenic photosynthesis. Some of them gave rise to
    chloroplasts, while others continued to evolve as independent
    organisms, and the review outlines both lines
    of evolution. At the end we consider the evolution of
    photosynthesis in relation to the evolution of our planet.
    Originalspråkengelska
    Sidor (från-till)1466-1474
    TidskriftCurrent Science
    Volym96
    Nummer11
    StatusPublished - 2009

    Bibliografisk information

    Coauthor Govindjee has no given name (applies also to another submitted article). I have added family name Govindjee as given name because the system did not accept a blank. Govindjee had trouble with the American computer system, too, when he immigrated to USA, but went to court and was allowed to have one name only.

    Ämnesklassifikation (UKÄ)

    • Biologiska vetenskaper

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