【摘要】 磷酸缓冲液对保护酶系的影响因处理方式和小麦 (Triticum aestivum L.)品种而异。一般是 SOD和 POD活性显著增强 ,前者随 SO2 熏气剂量的增加而降低 ,但较对照为高 ,并有新同工酶谱产生 ;后者随 SO2 熏气剂量的增加而增高 ,并与磷酸缓冲液呈交互促进效应 ,同工酶谱显著增强。作为清除自由基保护酶系的变化 ,可能是磷酸缓冲液减轻小麦苗 SO2 伤害的原因之一。更多还原

【Abstract】 The effect of phosphate buffer on protective enzyme system was different as the way of treatment and wheat （Triticum aestivum L.） species.Normally superoxide dismutase （SOD） and peroxidase （POD） activity increased markedly. The former decreased with the increase of SO 2 fumigation dosage but it was higher than control and producted new isoenzyme pedigree. The latter increased according to SO 2 fumigation and showed relative gain effect with phosphate buffer the isoenzyme pedigree increased markedly.The change of protective enzyme system of scavenging free radicals was possible one cause that phosphate buffer eased SO₂ insult of wheat seedlings.更多还原