Fig. 4From: A highly efficient auxin-producing bacterial strain and its effect on plant growthInducibility of IAA production through the addition of l-tryptophan. The growth of CG20001 (A) and absorbance of Salkowski reaction of the culture (B). Trp was added at the start of cultivation (blue line), or at the marked time point (red arrows) in the orange line. Trp was added at a final concentration of 0.025%Back to article page