Bidiectional reflectance changes induced by blue light in Arabidopsis - two polarizer setup

Time courses of the polarized red-light bidirectional reflectance induced by 1 h irradiation with high blue light (100 µmol·m-2·s-1) of the adaxial surface of rosette leaves of 5-week-old wild-type and phot1phot2 Arabidopsis plants. The blue actinic and red measuring beams impinged the adaxial leaf surface at the angle of 55°. For measurements of diffuse reflectance, the detector was positioned at 0° to the leaf’s normal. For measurements of combined specular and diffuse reflectance, the detector was positioned at -55°. Four possible combinations of the orientation (P/S) of the polarizers in front of the measuring light source and the detector were examined
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