Herbicides toxicity effects on the PSII electron transport efficiency (1-VJ) of IL and selected D1 random mutants, and corresponding R/S values.

The I50 is the molar herbicide concentration, which induces 50% inhibition of the parameter 1-VJ. The R/S were calculated as ratios of mutant I50 and I50 of the reference strain; the asterisks indicate values that do not differ significantly from the IL strain at p≤0.05 (Mann-Whitney U Test). We considered that R/S1.1 – increased herbicide resistance and 0.9≤R/S≤1.1 – no significant alterations in the mutants herbicide sensitivity relative to the reference strain.