Počet záznamů: 1

Near-distance imaging spectroscopy investigating chlorophyll fluorescence and photosynthetic activity of grassland in the daily course

  1. 1.
    0340933 - UEK-B 2010 RIV US eng J - Článek v odborném periodiku
    Ač, Alexander - Marek, Michal V. - Malenovský, Z. - Hanuš, Jan - Urban, Otmar - Tomášková, Ivana
    Near-distance imaging spectroscopy investigating chlorophyll fluorescence and photosynthetic activity of grassland in the daily course.
    Functional Plant Biology. -, - (2009), od 1006 do 1015 ISSN 1445-4408
    Grant CEP: GA MŠk 2B06068
    Výzkumný záměr: CEZ:AV0Z60870520
    Klíčová slova: imaging spectroscopy * chlorophyll fluorescence * grassland
    Kód oboru RIV: ED - Fyziologie
    Impakt faktor: 1.678, rok: 2009

    Detection of grassland canopy chlorophyll fluorescence (Chl-F) conducted with an imaging spectroradiometer provided evidence of potential remote sensing estimation of steady-state Chl-F(Chl-Fs). Simultaneously, measurements of Chl-F and total chlorophyll content (Chla + b) were made on a single leaf at ground level were collected. A specifically designed ‘shade removal’ experiment revealed the influence of dynamic physiological plant processes on hyperspectral reflectance of three wavelengths: 532, 686 and 740 nm. Based on this information, the vegetation indexes R686/R630, R740/R800 and PRI calculated as (R532–R570)/(R532+R570) were tested for statistical significance with directly measured Chl-F parameters (maximum fluorescence yield, Fv/Fm; steady-state chlorophyll fluorescence, Chl-Fs and actual quantum yield, KII). The grassland species under investigation were: Festuca rubra agg. (L.), Hieracium sp., Plantago sp., Nardus stricta (L.) and Jacea pseudophrygia (C.A. Meyer).
    Trvalý link: http://hdl.handle.net/11104/0184073