TABLE 6.
Population sizes of solitary bacteria and bacteria aggregated in biofilms on leaves of field-grown broad-leaf endive and parsley
| Plant | 105 Total CFU/ga on:
|
B/(B + S)b | 105 Fluorescent CFU/ga on:
|
B/(B + S)b | ||
|---|---|---|---|---|---|---|
| Solitary | Biofilm | Solitary | Biofilm | |||
| Endive | 82.3 (3.6) | 51.3 (7.7) | 0.38 | 2.7 (0.2) | 1.3 (0.3) | 0.32 |
| 65.8 (3.2) | 30.8 (2.6) | 0.32 | 0.8 (0.1) | 0.2 (0.1) | 0.20 | |
| 201.0 (0.8) | 31.0 (3.8) | 0.13 | 4.1 (0.8) | 0.5 (0.3) | 0.11 | |
| Parsley | 62.2 (5.3) | 3.2 (0.4) | 0.05 | 18.1 (0.2) | 0.1 (0.04) | 0.005 |
| 113.0 (8.5) | 20.5 (3.8) | 0.15 | 6.4 (1.3) | 0.9 (0.2) | 0.12 | |
| 75.6 (10.4) | 15.4 (0.5) | 0.17 | 5.5 (0.4) | 1.1 (0.2) | 0.17 | |
a
Values represent the mean population size determined from three aliquots of washings of each leaf (endive) or each bunch of leaves (parsley). Values in parentheses are the standard error of the mean.
b
B/(B + S) represents the frequency of biofilm (B) bacteria in the total population (biofilm + solitary [S]).