Effect of Norflurazon on Responses of Superoxide Dismutase and Catalase in a standard Maize Inbred Line and Superoxide Dismutase Mutant

摘要

We compared the responese of superoxide dismutase (SOD) and catalase (CAT) to a herbicide norflurazon (NF)-induced oxidative stress in leaves and mesocotyls of a standard maize (Zea mays) inbred line (W64A) to those of a a SOD mutant (A130-1) having a mutation in leaves and mesocotyls of the two maize lines. In leaf and mesocotyl tissues, the Sod3 transcript increased only at a 33 muM NF in W64A, whereas Sod3 increased at 33muM and 100 muM in A130-1. The Sod4A transcript increased only in A130-1. Cat2 increased in the leaves of NF-treated W64A but decreased significantly in the leaves of A130-1. In mesocotyls, the Cat2 transcript increased only in A130-1 upon NF treatment. The maize variant with a mutation in Sod1 demonstrated differences in the induction of Sod and Cat transcripts from the standard inbred line W64A in response to NF-induced oxisative stress.