Photoreception and Photomovements in Blepharisma japonicum
From the beginning of the century, the red heterotrichous ciliate Blepharisma has been an interesting subject of studies in the field of photobiology because of its endogenous pigment blepharismin. In fact, if Blepharisma is exposed to relatively strong light, in the presence of oxygen, blepharismin acts as a strong photosensitizer and readily causes its death. This almost unique behavior of an organism producing a pigment that photosensitizes not only its predators but the organism itself, is a puzzle for proto-zooloeists studying evolutionary processes.
KeywordsAction Spectrum Fluence Rate Anabaena Variabilis Negative Phototaxis Singlet Molecular Oxygen
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