HOTOACOUSTIC SPECTROSCOPY AND ITS APPLICATION IN PLANT-SCIENCE

The principles of photoacoustic spectroscopy are outlined. This new and still developing technique enables one to detect non‐radiative de‐excitation processes. It is possible to distinguish between signals emenating from different depths of the sample. In plant science photoacoustic spectroscopy has mainly been applied in photosynthesis research. Here it allows the detection of gross oxygen evolution and gives information about the energy balance of the primary photosynthetic reaction. 1990 Deutsche Botanische Gesellschaft/German Botanical Society