TABLE 1.

Induction of natural populations of bacteria by addition of mitomycin C and PO43−a

Date (mo/day/yr)VDC ml−1% Change
TreatmentbControlc
6/26/001.07 × 107 ± 1.68 × 1061.06 × 107 ± 4.04 × 1050.94 ± 16.4
7/5/001.06 × 107 ± 7.60 × 1051.07 × 107 ± 6.03 × 105−0.93 ± 10.0
7/17/006.24 × 106 ± 1.48 × 1066.46 × 106 ± 1.06 × 105−3.4 ± 23.6
8/8/002.70 × 106 ± 1.02 × 1059.81 × 106 ± 2.25 × 106−72.5 ± 30.0
8/21/00d1.36 × 107 ± 1.78 × 1068.80 × 106 ± 1.81 × 10654.5 ± 18.2
9/11/001.05 × 107 ± 3.33 × 1068.46 × 106 ± 8.49 × 10524.1 ± 27.2
9/25/001.81 × 107 ± 4.59 × 1062.57 × 106 ± 4.08 × 105604.3 ± 288.9
10/9/001.34 × 107 ± 1.17 × 1076.64 × 106 ± 1.45 × 106101.8 ± 125.4
10/23/009.50 × 106 ± 6.37 × 1057.19 × 106 ± 8.23 × 10532.1 ± 11.7
  • a Results are presented as means ± SD.

  • b Treatment with mitomycin C plus PO43−.

  • c Mitomycin C alone.

  • d Boldface type indicates a date on which significant induction was observed.