Cd、水分单一及复合胁迫对异叶天南星叶片抗氧化酶的活性影响

为探讨Cd、水分单一及复合胁迫条件下对异叶天南星叶片伤害及其抗氧化酶活性的响应，研究并比较了不同浓度Cd (200、400、800 mmol/L)和水分胁迫（PEG6000模拟，浓度分别为10%、20%、40%）条件下异叶天南星叶片的丙二醛(MDA)和超氧化物歧化酶(SOD)、过氧化氢酶(CAT)、过氧化物酶(POD)等抗氧化酶活性的影响。结果表明：在单一、复合胁迫条件下，相对于对照来说，MDA含量呈上升趋势，SOD、POD、CAT整体呈现先升高后降低趋势。同时，对于比较同水平浓度下单一因子胁迫而言，复合胁迫MDA含量体现出协同效应，SOD、POD、CAT则体现协同或拮抗效应。

Effects of Cadmium, Water Single and Combined Stress on Antioxidant Enzyme Activity of Arisaema heterophyllum BI leaves

To investigate the role of Cd, water single and combined stress conditions of Arisaema heterophyllum leaves damage and antioxidant enzyme activity, under the different concentration of Cd (200mmol/L, 400mmol/L, 800mmol/L) and water stress (PEG6000 simulation, the concentrations of 10%, 20%, 40%) conditions, this paper studied and compared the malonaldehyde (MDA) and superoxide dismutase (SOD), catalase (CAT), peroxidase (POD) effects of antioxidant enzyme activity in Arisaema heterophyllum leaves. Results showed that in a single or combined stress condition, compared with the control, the content of MDA increased, SOD, POD, CAT showed a trend of first increased then decreased. At the same time, with the level of concentration to played an order of a factor of stress, MDA content in the composite stress showed synergistic effect, SOD, POD, CAT showed synergistic or antagonistic effect.