Laser-induced fluorescence emission signatures and spectral fluorescence ratios of terrestrial vegetation

The UV-laser induced fluorescence emission spectra (LIF signatures) of leaves with different chlorophyll and carotenoid content were recorded and the three fluorescence ratios blue/red (F450/F690), blue/green (F450/F530) and red/red (F690/F735) determined. The chlorophyll fluorescence ratio F690/F73...

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Bibliographic Details
Main Authors: Lichtenthaler, H.K., Stober, F., Lang, M.
Format: Conference Proceeding
Language:English
Subjects:
Fluorescence
Laser excitation
Laser radar
Lighting
Physiology
Pigmentation
Remote sensing
Stress
Sun
Vegetation
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Summary:The UV-laser induced fluorescence emission spectra (LIF signatures) of leaves with different chlorophyll and carotenoid content were recorded and the three fluorescence ratios blue/red (F450/F690), blue/green (F450/F530) and red/red (F690/F735) determined. The chlorophyll fluorescence ratio F690/F735 exhibited a curvilinear inverse relationship to the chlorophyll content. The fluorescence ratio F450/F530 reflects not only chlorophyll but also carotenoid content (linear relationship with the pigment ratio chlorophylls/carotenoids). The ratio blue/red (F450/F690) is very sensitive to environmental changes (e.g. to the high light intensity during growth of plants). From excitation spectra it is deduced that the UV-laser of a future lidar fluorosensor should excite in the wavelength range of 370 to 395 nm in order to equally excite the blue, green and red plant fluorescence.< >
DOI:10.1109/IGARSS.1993.322672