MECHANISM OF BIODEGRADATION OF ORGANOPHOSPHATE PESTICIDES IN AQUATIC ECOSYSTEM 3. EFFECT OF PARATHION AND ITS DEGRADATION PRODUCTS ON PHOTOSYNTHESIS OF SCENEDESMUS OBLIQUUS AND P-NITROPHENOL DEGRADATION IN ALGAE-BACTERIA SYSTEM

The effect of parathion and its degradation products on photosynthesis of Scenedesmus obliquus was investigated. The toxicity of p-nitrophenol is much stronger than the sodium salts of nitrophenol, diethylthiophosphate and parathion. Studies of simulated algae-bacteria system of Pseudomonas sp. CTP-02 and Scenedesmus obliquus, using p-nitrophenol as substrate, indicate that oxygen needed for aerobic bacteria can be provided by photosynthesis of algae.