Relationship between the indigo yield and the abundance of nagAc gene in T1 (A), T2 (B) and T3 (C) stages.
The line represents the linear-fit model to the data. Triple asterisks indicate P < 0.001. The relative abundance of the nagAc gene, given in log10 unit, was determined by qPCR quantification using the nagAc gene from Comamonas sp. MQ as the standard.