Ecotoxicity of a Pesticide Dichlorvos on a Biofertilizer Anabaena oryzae

By : Saumya Snehee, D.D. Pandey

Page No: 51-56

Abstract
Anabaena oryzae, an autotrophic nitrogen fixing cyanobacterium, exhibited strong potentiality to serve as bio-N-fertilizer in place of synthetic fertilizer, urea. But the cyanobacterium was very sensitive to an organophosphate pesticide dichlorvos, frequently employed in the paddy fields of Nalanda for pest control. Dichlorvos inhibited growth of the cyanobacterium above concentration of 5ppm, while the 75 and 100ppm doses were completely lethal for the microorganism. The lethal doses caused massive lysis of the cyanobacterial cells. However, the metabolic activities like photosynthesis, respiration or nitrogen fixation was not influenced by dichlorvos.

Authors : 
Saumya Snehee and D.D. Pandey
Department of Biotechnology, Nalanda College, Biharsharif

DOI: https://doi.org/10.32381/JPSR.2020.36.1-2.6