Figure 1
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Figure 3
Percentages of germination and microbial contamination in preliminary lettuce seed tests of fuming surface sterilization methods_ Tests were conducted with ‘Waldmann's Green’ lettuce seeds that had microbial contamination_ Germination was tested immediately and following 1 month of storage for promising treatments_
| Fuming Treatment | Germination | Contamination | Stored Germination |
|---|---|---|---|
| Bleach alone-12 h | 96% | 100% | - |
| Bleach+1 mL HCL-20 h | 0% | 0% | - |
| Bleach+0.5 mL HCL-1h | 100% | 0% | 92% |
| Bleach+1 mL HCL-1h | 100% | 0% | 4% |
| Untreated | 96% – 100 % | 100% | 95% |
Percentages of seeds germinating in the VEG-01 and VEG-03 tests_ Each value represents a percentage of the 12 seeds planted in 6 pillows_
| Test | Plant | Germination – Flight (%) | Germination-Ground (%) |
|---|---|---|---|
| VEG-01A | ‘Outredgeous’ lettuce | 75 | 100 |
| VEG-01B | ‘Outredgeous’ lettuce | 67* | 75 |
| VEG-01C | ‘Profusion’ zinnia | 100* | 92 |
| VEG-03A | ‘Outredgeous’ lettuce | 92 | 92 |
| VEG-03B | ‘Tokyo Bekana’ Chinese cabbage | 92 | 100 |
| VEG-03C | ‘Tokyo Bekana’ Chinese cabbage | 92 | 100 |
Percentages of germination (G) and contamination (C) observed for Veggie candidate flight seeds tested with different surface sterilization treatments_ Dashes indicate that these tests were not performed_ Values in bold indicate methods selected for flight seeds_
| Treatment | ‘Profusion’ Zinnia | ‘Durango’ French Marigold | ‘Outredgeous’ Lettuce | ‘Tokyo Bekana’ Chinese cabbage | ||||
|---|---|---|---|---|---|---|---|---|
| G | C | G | C | G | C | G | C | |
| Bleach + 0.5 mL | 80–100% | 0% | 70% | 40% | 100% | 0% | 100% | 0% |
| Bleach + 1 mL | 80% | 0% | 70% | 60% | - | - | 100% | 0% |
| Bleach + 0.5 mL | 30% | 0% | 10% | 0% | - | - | - | - |
| 70% EtOH – 5 min | 90–100% | 0% | 30% | 60% | 80–100% | 20–40% | 100% | 100% |
| 70% EtOH – 10 min | - | - | - | - | - | - | 92% | 20% |
| Untreated | 67–100% | 20–40% | 60–100% | 100% | 90–100% | 20–80% | 100% | 100% |