This paper studied the resistance of four colored-leaf species in Prunus to sulfur dioxide to provide scientific references for selecting proper species as ornamental trees in landscape.The changes in activities of superoxide dismutase(SOD)and peroxidase(POD),membrane permeability,pH of extracted leaf fluid,and contents of malondialdehyde(MAD),proline and soluble proteins,absorbed sulfur were measured with two-year-old potted seedlings of Prunus cerasifera var.atropurpurea,Prunus×cistenena `Pissardii',Prunu...