The COD activity in leaf was inhibited by Cu,Cd,Hg, but the COD isozymes expression in ear was stimulated.

• Cu、Cd、Hg明显抑制小麦叶片细胞色素氧化酶(COD)活性，而对小麦灌浆期穗COD同功酶活性有明显的诱导作用。