Table 1.
Local acquired resistance induced by 10 μM or 50 μM BTH.
| untreated | H2O | 10 μM BTH | 50 μM BTH | |
| Exp.1 | 66 ± 24 % | 57 ± 25 % | 12 ± 9 % | 13 ± 11 % |
| Exp.2 | 68 ± 28 % | 71 ± 23 % | 34 ± 30 % | 5 ± 6 % |
| Mean value | 67 % | 64 % | 23 % | 9 % |
Four-week-old cucumber plants (with two true fully expanded leaves) were sprayed with H2O, 10 μM BTH, 50 μM BTH or left untreated. The second true leaf was infected with C. lagenarium 5 days later (ten infection sites per leaf). The percentages of spreading lesions (i.e. lesions showing a larger size than the initial inoculated area) observed 2 weeks after inoculation with C. lagenarium were calculated on the basis of 14 plants/treatment (experiment 1) and 16 plants/treatment (experiment 2) (means +/- standard deviations).