Arsenate and arsenite exposure modulate antioxidants and amino acids in contrasting arsenic accumulating rice (Oryza sativa L.) genotypes

► Contrasting As accumulating rice genotypes were selected from 303 rice cultivars. ► About 13 fold difference was observed between HARG and LARG for As accumulation. ► The induction of antioxidant was more in HARG than LARG along with MDA content. ► Total amino acids positively correlated in LARG and negatively correlated in HARG. ► Stress responsive amino acids showed higher accumulation in HARG than LARG.