Table 3.
Phytotoxin sensitivity of wildtype Arabidopsis and a mutant that exhibits enhanced sensitivity to sulfamethoxazole (ESS 3–10)
| Genotype | Compound | EC50(μM)a | LD50(μM)b |
|---|---|---|---|
| Wildtype |
Sulfamethoxazole |
3 |
5 |
| ESS 3-10 |
Sulfamethoxazole |
0.003 |
0.03 |
| Wildtype |
Sulfanilamide |
150 |
>250 |
| ESS 3-10 |
Sulfanilamide |
5 |
30 |
| Wildtype |
Salicylic acid |
75 |
150 |
| ESS 3-10 |
Salicylic acid |
75 |
150 |
| Wildtype |
Bialaphos |
0.1 |
0.75 |
| ESS 3-10 |
Bialaphos |
0.1 |
0.75 |
| Wildtype |
Methotrexate |
0.03 |
0.1 |
| ESS 3-10 | Methotrexate | 0.03 | 0.1 |
aEC50 indicates the concentration at which 50% of seedlings are bleached.
bLD50 indicates the concentration that is lethal to 50% of seedlings.
Data represent observations from at least three independent experiments.