Table 7. ACCase activity (in the absence of diclofop) and diclofop I 50 values determined for plants containing different resistance mutations/mutant alleles.
| Mutation/mutant allele | I50 values | I50 R/S ratio | ACCase activity (nmol HCO−3 mg−1 per protein min−1) | Activity R/S ratio |
|---|---|---|---|---|
| Experiment I | ||||
| 1781-Leu | 16.05 a | 2.0 | 1.58 a | 0.97 |
| 2078-Gly | 15.98 a | 2.0 | 0.50 b | 0.31 |
| 2088-Arg | 13.54 a | 1.7 | 0.39 b | 0.24 |
| Susceptible | 7.96 b | 1.63 a | ||
| Experiment II | ||||
| 1781+2078+2088 | 15.92 c | 2.6 | 2.23 b | 0.72 |
| 2078+2088 | 18.08 b | 3.0 | 1.39 c | 0.45 |
| 1781+2088 | 21.68 a | 3.6 | 1.34 c | 0.43 |
| Susceptible | 6.06 d | 3.10 a | ||
Abbreviations: ACCase, acetyl-coenzyme A carboxylase; R/S ratios, resistant/susceptible ratios.
Experiment I was conducted using plant materials at the 3- to 4-leaf stage and experiment II at the 4- to 5-leaf stage. Means with different letters in a column within an experiment are significantly different (α=0.05).