Fig. 2.
Population levels of P. fluorescens REN1 marked with gusA colonizing internal parts of roots (endophytic) of the rice seedlings (Cv, Gohar) grown in tube culture 3, 7, 14 and 20 days after inoculation in Hoagland liquid media under gnotobiotic conditions. Legend (treatments) shows: NH4, 5 mM (NH4)2SO4; Co, 2 μM CoCl2. (+) and (−) stand for presence and absence of treatments in sterile nutrient solution respectively. Initial bacterial concentration was 108 cell mL−1. Error bars indicate standard error of the mean. *; Significant at P <0.05