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低浓度（２ｍｍｏｌ／Ｌ）亚硫酸处理可使麦苗的ＳＯＤ活性增强，ＭＤＡ积累减少，质膜透性减小．高浓度（≥２０ｍｍｏｌ／Ｌ）的亚硫酸对麦苗造成伤害，使其ＳＯＤ活性下降，ＭＤＡ含量及质膜透性加大．ＳＯＤ活性，ＭＤＡ含量、质膜透性三者具有较强的相关性．磷酸缓冲液具有诱导ＳＯＤ活性，减少膜脂过氧化，稳定和保护小麦苗膜结构，减轻亚硫酸伤害的防护作用．
Sulfuric acid treatment at low concentration (2 mmol / L) could increase SOD activity, reduce MDA accumulation and decrease plasma membrane permeability. Sulfuric acid with high concentration (≥20mmol / L) caused injury to wheat germ and decreased its SOD activity and MDA content and plasma membrane permeability. SOD activity, MDA content, plasma membrane permeability of the three have a strong correlation. Phosphoric acid buffer has the protective effect of inducing SOD activity, reducing membrane lipid peroxidation, stabilizing and protecting the structure of wheat seedling membrane, and reducing sulfite damage.