Influence of chloride and bromate interaction on oxidative stress in carrot plants

► Bromide negatively affects carrot growth by increasing oxidative stress. ► Bromide concentrations of the shoots and storage roots were significantly increased by increasing levels of Br supply, although Cl supply noticeably decreased them. ► Higher than 20 mg kg−1 Br application significantly reduced total chlorophyll and carotenoids of carrot plants. ► Bromide treatments increased the accumulation of malondialdehyde and H2O2 and also activity of the antioxidant enzymes catalase (CAT) and ascorbate peroxidase (APX).