Effect of combined pollution of chromium and benzo (a) pyrene on seed growth of Lolium perenne

► Antagonistic relationship between Cr and B (a) P on shoot and root length of L. perenne. ► Synergistic relationship between Cr and B (a) P on shoot and root length of L. perenne. ► Antagonistic relationship between Cr and B (a) P on germination rate of L. perenne.