الملخص

Abstract The effect of different Concentration (1% -5%) of NaCl on growth of Rhizobium leguminosarum bv.viciae was studied by their addition to Manitol yeast extract agar medium and observing the bacterial growth and tolerance to exceeding salt concentration comparing to the control. The bacterium showed higher growth rate than control at 1% concentration, while the rates decreased at other concentration , with no growth at 5% concentration.