FIG. 3.

Survival of P. putida DOT-T1 in a fluvisol soil maintained at different humidities in the absence of toluene (A) or after a 1% (vol/wt) toluene shock (B). The humidity of the soil was adjusted to 5% (○), 15% (•), 30% (▵), or 45% (▴) of the field carrying capacity before bacteria were introduced. Then 10⁸ CFU per g of soil was added, and 1% (vol/wt) toluene was added to one set of pots (B). At different times the number of CFU per g of soil was determined.