Acclimatization of freshwater bacillus diatomas Navicula sp. for living in salty waters

Abstract

Bacillus diatoms. Navicula sp. were isolated from fresh water (Tigris River) and were acclimated progressively to grow in salty environment with alkaline media pH = 9. Bacillus diatoms Showed very good ability to acclimate for living in gradient salty water starting from 0.5 - 5 ppt. of samples of underground water containing Total Nitrogen 2.25, 1.07, 0.952, 9.005, 0.53 ppm, respectively, and Total Phosphorus 1.58, 1.61, 1.75, 0.565, and 0.785 ppm. consumed of TN: TP in ratio16:1 as in the following results 0.01, 0.02, 0.05, 1.005,0.01 ppm. for TN and 1.439, 1.327, 1.68, 0.065, 0.755 ppm. for TP. by using Least significant difference-LSD test, results showed significant differences for decreasing cells when the value of P <0.05 for increasing of adapted cells in ground water with gradually salty concentrations also for reducing TN before and after experiment, also a significant difference for reducing P in sample (4) of ground water in concentration 0.565 ppm before experiment which reduced to 0.065 ppm after experiment.