Light quality, oxygenic photosynthesis and more.

Dušan Lazár, Alexandrina Stirbet, Lars Olof Björn, Govindjee Govindjee

    Forskningsoutput: TidskriftsbidragÖversiktsartikelPeer review

    112 Nedladdningar (Pure)


    Oxygenic photosynthesis takes place in thylakoid membranes (TM) of cyanobacteria, algae, and higher plants. It
    begins with light absorption by pigments in large (modular) assemblies of pigment-binding proteins, which then
    transfer excitation energy to the photosynthetic reaction centers of photosystem (PS) I and PSII. In green algae
    and plants, these light-harvesting protein complexes contain chlorophylls (Chls) and carotenoids (Cars). However,
    cyanobacteria, red algae, and glaucophytes contain, in addition, phycobiliproteins in phycobilisomes that are attached
    to the stromal surface of TM, and transfer excitation energy to the reaction centers via the Chl a molecules in the inner
    antenna of PSI and PSII. The color and the intensity of the light to which these photosynthetic organisms are exposed
    in their environment have a great influence on the composition and the structure of the light-harvesting complexes
    (the antenna) as well as the rest of the photosynthetic apparatus, thus affecting the photosynthetic process and even the
    entire organism. We present here a perspective on ‘Light Quality and Oxygenic Photosynthesis’, in memory of George
    Christos Papageorgiou (9 May 1933–21 November 2020; see notes a and b). Our review includes (1) the influence of
    the solar spectrum on the antenna composition, and the special significance of Chl a; (2) the effects of light quality on
    photosynthesis, measured using Chl a fluorescence; and (3) the importance of light quality, intensity, and its duration
    for the optimal growth of photosynthetic organisms.
    Sidor (från-till)23 – 56
    StatusPublished - 2022 jan. 1

    Ämnesklassifikation (UKÄ)

    • Botanik


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