Biochemical Studies on the Response of Organo-phosphorus Insecticide and Release of Extra Cellular Products by Cyanobacteria

A comparative study on the cyanobacterial isolates, Anabaena ambigua Rao (A100) and Oscillatoria foreaui Fremy (A1340) were carried out to investigate the response of an organophosphorus insecticide Divap 100 at different concentrations of 1, 5 and 10ppm on the growth and release of extracellular products such as protein, nitrogen, ammonia, carbohydrates, amino acids and phenols. The experiment was conducted up to 28 days and observed at intervals of 4 days, which showed to be deleteriously affecting the release of these extracellular products in both the organisms. However, in A. ambigua, the release of extracellular products was affected at higher concentrations of 5 and 10ppm of Divap 100. It also revealed that these products were released in higher amounts only at late exponential phases even in untreated control conditions in both the isolates.