Abstract: The experiment was carried out using M₂₆ and SH₄₀ to study the effect of iron-stress on the contents of O₂^- and MDA and the activity of SOD and POD in root of two rootstocks by the method of hydroponics.The result showed that contents of O₂^- in SH₄₀ roots increased but contents of MDA decreased under iron stresss.The contents of O₂^- and MDA in the SH₄₀ roots were higher than that in the M₂₆ roots.The SOD activity increased firstly and decreased later and the POD activity increased in M₂₆ roots with iron-stress time extended,but SOD activity dropped and POD activity increased firstly and decreased later in SH₄₀ roots.The activity of SOD and POD in M₂₆ roots were higher than that in SH₄₀ roots.

Key words: Iron-stress, Apple, Rootstock, Roost, Active oxygen, Enzyme activity

CLC Number: 

• S661