EFFECTS OF ATRAZINE CONCENTRATIONS ON THE HILL REACTION IN ISOLATED CHLOROPLASTS OF TRIAZINE-RESISTANT AND SUSCEPTIBLE OILSEED RAPE (Brassica napus AND B. campestris) GENOTYPES

Abstract

Effects of atrazine concentrations (10−7 to 10−4 M) on the Hill reaction were evaluated using isolated chloroplasts from parentals, F1 and BC3 of triazine-resistant biotype of bird’s-rape (Brassica campestris) × B. napus ’Tower’ and bird’s-rape × B. campestris ’Torch’. Atrazine did not affect the Hill reaction of bird’s-rape, hybrids or BC3 with cytoplasm from the triazine-resistant bird’s-rape, but interfered with the Hill reaction in triazine-susceptible Tower and Torch.