Incubation duration   Controls salicylic acid concentration (mg/L) 50 200 400 800 1000 1h M ± SD 259 ± 1 262 ± 8 271 ± 1 267 ± 7 262 ± 1 276 ± 8 p - 0.4 0.009 0.1 0.3 0.03 3h M ± SD 259 ± 1 266 ± 6 269 ± 4 262 ± 1 261 ± 1 269 ± 7 p - 0.08 0.02 0.07 0.06 0.02 24h M ± SD 260 ± 1 369 ± 2 370 ± 1 372 ± 1 375 ± 2 376 ± 6 p - < 10-3 < 10-3 < 10-3 < 10-3 < 10-3 1 week M ± SD 259 ± 1 400 ± 1 402 ± 1 407 ± 1 414 ± 1 418 ± 3 p - < 10-3 < 10-3 < 10-3 < 10-3 < 10-3

Table 1: PON1 activity (IU/L) according to salicylic acid concentration and time of incubation at 25°C.