摘要： 试验以SH₄₀、M₂₆两种苹果砧木为试材，研究了缺铁胁迫对根系组织中O₂^-.（超氧阴离子）含量及SOD（超氧化物歧化酶）、POD（过氧化物酶）活性的影响。结果表明：铁胁迫条件下SH₄₀根系内O₂^-.含量升高，MDA含量降低，O₂^-.和MDA含量均高于M₂₆根系内的。随着铁胁迫处理时间的延长，M₂₆根系内SOD活性先升高后降低，POD活性一直升高；而SH₄₀根系内SOD酶活性降低，POD活性先升高后降低。M₂₆根系内SOD、POD活性均高于SH₄₀。

关键词: 缺铁胁迫, 苹果, 砧木, 根系, 活性氧, 酶活性

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

中图分类号: 

• S661