TABLE 5.
Survival of C. michiganense G7.1 and T5.1 on peanut leaves irradiated with UV-C
| Strain | Time p.i. (h)a | UV-C dose (J m−2) | % Survivalb | In planta/in vitro survival ratioc |
|---|---|---|---|---|
| G7.1 | 0 | 75 | 31.0 | 0.5 |
| 150 | 12.3 | 0.4 | ||
| 225 | 5.2 | 0.6 | ||
| 300 | 4.0 | 1.4 | ||
| 375 | 2.6 | 5.0 | ||
| 24 | 75 | 52.9 | 0.9 | |
| 150 | 34.4 | 1.1 | ||
| 225 | 62.6 | 7.0 | ||
| 300 | 8.5 | 3.1 | ||
| 375 | 9.7 | 18.7 | ||
| 48 | 75 | 85.8 | 1.4 | |
| 150 | 33.7 | 1.1 | ||
| 225 | 24.2 | 2.7 | ||
| 300 | 15.2 | 5.5 | ||
| 375 | 8.2 | 15.8 | ||
| 72 | 75 | 61.4 | 1.0 | |
| 150 | 23.8 | 0.8 | ||
| 225 | 14.2 | 1.6 | ||
| 300 | 5.8 | 2.1 | ||
| 375 | 3.9 | 7.5 | ||
| 96 | 75 | 52.9 | 0.9 | |
| 150 | 30.4 | 1.0 | ||
| 225 | 9.2 | 1.0 | ||
| 300 | 10.1 | 3.6 | ||
| 375 | 7.7 | 14.8 | ||
| T5.1 | 0 | 50 | 49.1 | 0.9 |
| 100 | 20.5 | 2.0 | ||
| 150 | 11.5 | 15.7 | ||
| 200 | 8.5 | 202.4 | ||
| 250 | 2.7 | 540.0 | ||
| 24 | 50 | 41.1 | 0.8 | |
| 100 | 20.1 | 2.0 | ||
| 150 | 12.3 | 16.8 | ||
| 200 | 8.2 | 195.2 | ||
| 250 | 15.7 | 3,140.0 | ||
| 48 | 50 | 43.9 | 0.8 | |
| 100 | 31.1 | 3.0 | ||
| 150 | 11.2 | 15.3 | ||
| 200 | 8.4 | 200.0 | ||
| 250 | 11.1 | 2,220.0 | ||
| 72 | 50 | 100.0 | 1.9 | |
| 100 | 41.1 | 4.0 | ||
| 150 | 47.6 | 64.9 | ||
| 200 | 27.9 | 664.3 | ||
| 250 | 13.6 | 2,720.0 | ||
| 96 | 50 | 67.8 | 1.3 | |
| 100 | 21.6 | 2.1 | ||
| 150 | 19.0 | 25.9 | ||
| 200 | 8.9 | 211.9 | ||
| 250 | 1.5 | 300.0 |
a
p.i., postinoculation. After spray inoculation of bacteria, plants were incubated in a growth chamber under high-humidity conditions.
b
(Mean total population from UV-C-irradiated leaves/mean total population from nonirradiated leaves) × 100. Cell populations from leaves were removed by sonication and enumerated by dilution plating.
c
Ratio derived from the percent survival determined in planta divided by the corresponding percent survival determined in vitro at the same UV-C dose.