Use of batch assays to assess the toxicity of atrazine to some selected cyanobacteria. II. Effect of atrazine on heterocyst frequency, nitrogen and phosphorus metabolism of four heterocystous cyanobacteria

摘要: Atrazine added in different doses to the culture media, augmented with glucose, of Aulosira fertilissima, Tolypothrix tenuis, Anabaena oryzae and Nostoc muscorum enhanced heterocyst frequency efficiency nitrogen fixation. Variations amounts fixed between four test organisms may be attributed differences levels high energy substance ATP, also various effects on permeability barrier cells. Although atrazine is a metabolic inhibitor, it particularly phosphorus metabolism, leading more amino-N protein-N accumulation, yielding active synthesis organic phosphorus, total soluble insoluble contents.