Reabsorption of Chlorophyll Fluorescence and Its Effects on the Spectral Distribution and the Picosecond Decay of Higher Plant Leaves

Frank Terjung Fachbereich Physik, Carl von Ossietzky-Universität Oldenburg, D-26111 Oldenburg, Germany Z. Naturforsch. 53c, 924-926 (1998); received May 18/June 9, 1998 Fluorescence Lifetimes, Photosystem II, Reabsorption of Fluorescence Effects of reabsorption of chlorophyll fluorescence were investigated in measurements on chloroplasts and higher plant leaves. The excitation was performed at 650 nm in a typical excitation/detection arrangement; with increasing chlorophyll concentrations, the mea­ sured spectral distribution of the chlorophyll fluores­ cence was significantly distorted, but no effects on the picosecond decay were observed, when this was detected at 685 nm.