We have researched the happen and influence of maize rough dwarf disease, the molecule biology identification of vims and identified many maize cultivars resistance to MRDV. Basing on the disease resistance identification of two years, we studied three cultivars which have different resistance to MRDV about the change of Peroxidase (POD), Polyphenol oxidase (PPO) Esterase ( EST), Superoxide dismutase (SOD) Phenylalanine ammonialyase (PAL) and Soluble protein (SPR) at three-leaf stagc and five-le...