Abstract
Chlorophyll fluorescence (CF) is the absorption of blue or red photons (= excitation) by chlorophyll molecules and the emission of far red photons (the energy difference is lost as heat). In contrast to chloroform solutions of chlorophyll or to fluorescent dyes, the emission from active photosynthetic systems does not remain constant, but changes in a complicated way after a constant excitation light is switched on. These changes (= variable fluorescence) are due to the onset of photosynthetic reactions that consume absorbed quanta. Accordingly, several derived fluorescence parameters (see below) provide diagnostic information about the state of the photosynthetic apparatus.
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Jensen, M. (2002). Measurement of Chlorophyll Fluorescence in Lichens. In: Kranner, I.C., Beckett, R.P., Varma, A.K. (eds) Protocols in Lichenology. Springer Lab Manuals. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-56359-1_9
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DOI: https://doi.org/10.1007/978-3-642-56359-1_9
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