Figure 4

EPSPS activity in glyphosate-susceptible and -resistant plants of goosegrass (Eleusine indica) biotypes collected in citrus groves in Veracruz, Mexico. (a) Basal EPSPS activity in glyphosate -susceptible and -resistant goosegrass plants. Histograms represent the treatment means and vertical bars ± standard error (n = 3). (b) EPSPS enzyme activity expressed as a percentage of the untreated control in leaf extracts of plants from glyphosate-susceptible and resistant goosegrass biotypes. Vertical bars represent ± standard error (n = 3).