FIG. 4.

Effects of phosphate addition (rescue effects) on cell growth (a), TcPHO mRNA expression (b), and alkaline phosphatase activity (c) in T. chui. Phosphate was added on day 3 after inoculation, and various measurements were obtained on day 4. The additional phosphate was provided as either inorganic phosphate (Pi) (open bars) or organic phosphate (PNPP) (cross-hatched bars). The culture which received no phosphorus on day 3 served as the control (ctrl) (solid bars). The error bars indicate the standard errors of the means (n = 3).