Fig. 2. Growth and poly-P accumulation in BG-11 medium after the addition of excess phosphate (1.12 M).

A. Fresh cell weight (g/l); B. poly-P (mM poly-P/g DCW) and remaining phosphate concentrations (mM) in media of wildtype and ΔphoU strains. ΔphoU: Syn6803 phoU knockout strain; poly-P, polyphosphate. Data are presented as the means of values obtained from experiments conducted in triplicate; standard deviation values are presented (vertical error bars). The fresh cell weight and poly-P concentration differed significantly: p < 0.05 by Student’s t-test.