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

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    0340933 - ÚVGZ 2010 RIV US eng J - Journal Article
    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. E-ISSN 1445-4416
    R&D Projects: GA MŠMT 2B06068
    Institutional research plan: CEZ:AV0Z60870520
    Keywords : imaging spectroscopy * chlorophyll fluorescence * grassland
    Subject RIV: ED - Physiology
    Impact factor: 1.678, year: 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).
    Permanent Link: http://hdl.handle.net/11104/0184073

     
     
Number of the records: 1  

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