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Negative feedback regulation is responsible for the non-linear modulation of photosynthetic activity in plants and cyanobacteria exposed to a dynamic light environment

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    SYSNO ASEP0170746
    Document TypeJ - Journal Article
    R&D Document TypeJournal Article
    Subsidiary JOstatní články
    TitleNegative feedback regulation is responsible for the non-linear modulation of photosynthetic activity in plants and cyanobacteria exposed to a dynamic light environment
    Author(s) Nedbal, Ladislav (UEK-B)
    Březina, Vítězslav (UEK-B)
    Adamec, František (UEK-B)
    Štys, Dalibor (UEK-B)
    Oja, V. (XX)
    Laisk, A. (XX)
    Govindjee, A. (XX)
    Source TitleBiochimica Et Biophysica Acta-Bioenergetics. - : Elsevier - ISSN 0005-2728
    Roč. 1607, č. 1607 (2003), s. 5-17
    Number of pages13 s.
    Languageeng - English
    CountryNL - Netherlands
    KeywordsCalvin-Benson Cycle ; Forced oscilation ; Intermittent light
    Subject RIVEI - Biotechnology ; Bionics
    R&D ProjectsLN00A141 GA MŠMT - Ministry of Education, Youth and Sports (MEYS)
    CEZMSM 123100001
    AV0Z6087904 - UEK-B
    AnnotationPhotosynthetic organisms exposed to a dynamic light environment exhibit complex transients of photosynthetic activities that are strongly dependent on the temporal pattern of the incident irradiance. In a harmonically modulated light of intensity I approximate to const. + sin(omegat), chlorophyll fluorescence response consists of a steady-state component, a component modulated with the angular frequency of the irradiance omega and several upper harmonic components (2omega, 3omega and higher). Our earlier reverse engineering analysis suggests that the non-linear response can be caused by a negative feedback regulation of photosynthesis. Here, we present experimental evidence that the negative feedback regulation of the energetic coupling between phycobilisome and Photosystem II (PSII) in the cyanobacterium, Synechocystis sp. PCC6803 indeed results in the appearance of upper harmonic modes in the chlorophyll fluorescence emission.
    WorkplaceGlobal Change Research Institute
    ContactNikola Šviková, svikova.n@czechglobe.cz, Tel.: 511 192 268
    Year of Publishing2004

Number of the records: 1  

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