Počet záznamů: 1

Blue radiation stimulates photosynthetic induction in Fagus sylvatica L

  1. 1.
    0338733 - UEK-B 2010 RIV CZ eng J - Článek v odborném periodiku
    Košvancová, Martina - Urban, Otmar - Navrátil, M. - Špunda, V. - Robson, T.M. - Marek, Michal V.
    Blue radiation stimulates photosynthetic induction in Fagus sylvatica L.
    Photosynthetica. Roč. 47, č. 3 (2009), s. 388-398 ISSN 0300-3604
    Grant CEP: GA AV ČR IAA600870701; GA MŠk OC08022; GA ČR GA522/07/0759
    Výzkumný záměr: CEZ:AV0Z60870520
    Klíčová slova: blue/red ratio * electron transport * non-photochemical quenching * radiation duality * Rubisco activation * Transient limitations of photosynthesis.
    Kód oboru RIV: ED - Fyziologie
    Impakt faktor: 1.072, rok: 2009

    This study was designed to test the hypothesis that the spectral composition of incident radiation can affect photosynthetic induction, since B photons (B; λmax = 455 nm) stimulate stomatal opening and are more effectively absorbed by leaves than R photons (R; λmax = 625 nm). Different stages of photosynthetic induction, primarily determined by the photo-modulation of Rubisco activity and stomata opening, were investigated in dark-adapted leaves of Fagus sylvatica transferred to saturating irradiance [800μmol(photon) m–2 s–1] at B/R ratios of 1/3, 1/1, or 3/1. Photosynthesis was induced faster by irradiance with a high B/R ratio (3/1). However, there were no differences in induction between leaves receiving equal (1/1) and low (1/3) B/R ratios. Electron transport was highly sensitive to radiation quality, exhibiting faster induction kinetics with increasing B/R ratio. In contrast, the kinetics of stomatal opening was independent of the spectral composition of incoming radiation.
    Trvalý link: http://hdl.handle.net/11104/0182430