【摘要】 实验以高等水生沉水植物菹草为材料,研究在不同浓度Cd2+毒害条件下外施乙酰水杨酸(ASA)对菹草叶中叶绿素含量、可容性蛋白含量、O2+产生速率、保护酶--超氧化物歧化酶(SOD)、过氧化物酶(POD)、过氧化氢酶(CAT)活性的影响.结果表明,施用ASA可以显著提高叶绿素和可溶性蛋白的含量,增强保护酶的活性,降低O2+产生速率,从而减轻了重金属Cd2+胁迫对植物体造成的伤害.更多还原

【Abstract】 Changes of chlorophyll content, soluble protein content , 02+ generating rate and activity of protective enzymes (SOD, POD, CAT) in leaves of Potamogeton crispus Linn. under different concentration gradient of Cd2 + stress or exogenous acetosalicylic acid treatment were studied and analyzed. The results showed that exogenous acetosalicylic acid could increase chlorophyll and soluble protein content clearly, and markly enhance activity of protective enzymes. At the same time O2+ generating rate was lower than those of treament under single Cd2+ stress . So it was concluded that acetosalicylic acid could alleviate the toxic effects caused by Cd2 + stress.更多还原