FIG. 3.
Population change during incubation in growth medium lacking nutrient carbon. ⧫, wild-type strain Rm1021; ■, PHB synthesis mutant strain Rm11105; ▴, PHB degradation-deficient strain Rm11134. The CFU present in each of the cultures immediately after subculture to carbon nutrient-free growth medium (ca. 5 × 106 per ml) was given a relative value of 1, and values are presented as the means of three samples ± standard deviation. The standard deviation values immediately after inoculation (time = 0 days) were 0.21, 0.53, and 0.43 for Rm1021, Rm11105, and Rm11134, respectively.