Development of a low-cost culture medium for the rapid production of plant growth-promoting Rhodopseudomonas palustris strain PS3
Fig 2
Three-dimensional response surfaces and contour plots of the effects of three factors on R. palustris PS3 biomass production.
When two factors were plotted, the other two factors were set at the coded level, zero. Each condition was as follows: CSL, 40 mL/L; molasses, 35 g/L; temperature, 38.5°C and pH value, 6.9. (A): CSL and molasses were plotted at 38.5°C and pH 6.9; (B) CSL and temperature were plotted at 35 g/L molasses and pH 6.9; (C) molasses and temperature were plotted at 40 mL/L CSL and pH 6.9; (D) molasses and pH were plotted at 40 mL/L CSL and 38.5°C; (E): CSL and pH were plotted at 35 g/L molasses and 38.5°C; (F): temperature and pH were plotted at 40 mL/L and 35 g/L molasses. CSL: corn steep liquor.