CAJ | 학술논문

为了探讨杂交狼尾草（ Pennisetum americanum ×P.purpureum）的耐重金属性，用杂交狼尾草为试验材料，就不同程度重金属污染胁迫对其叶片中叶绿体色素、可溶性蛋白质、丙二醛（ MDA）质量浓度，超氧化物歧化酶（ SOD）、过氧化氢酶（ CAT）、过氧化物酶（ POD）活性以及叶膜电解质相对渗透率的影响进行了研究．结果表明，随着重金属胁迫的加重，杂交狼尾草叶片中的叶绿体色素、可溶性蛋白质质量浓度呈下降趋势， MDA质量浓度和叶膜电解质相对渗透率呈上升趋势， SOD、 CAT和POD活性呈先上升后下降趋势．轻度重金属污染胁迫对杂交狼尾草生理生化指标影响不显著，中、重度重金属污染胁迫下其仍然可以生长，表明杂交狼尾草对重金属污染有一定的耐受性，其可被用作重金属复合污染地区土壤的修复植物．
위료탐토잡교랑미초（ Pennisetum americanum ×P.purpureum）적내중금속성，용잡교랑미초위시험재료，취불동정도중금속오염협박대기협편중협록체색소、가용성단백질、병이철（ MDA）질량농도，초양화물기화매（ SOD）、과양화경매（ CAT）、과양화물매（ POD）활성이급협막전해질상대삼투솔적영향진행료연구．결과표명，수착중금속협박적가중，잡교랑미초협편중적협록체색소、가용성단백질질량농도정하강추세， MDA질량농도화협막전해질상대삼투솔정상승추세， SOD、 CAT화POD활성정선상승후하강추세．경도중금속오염협박대잡교랑미초생리생화지표영향불현저，중、중도중금속오염협박하기잉연가이생장，표명잡교랑미초대중금속오염유일정적내수성，기가피용작중금속복합오염지구토양적수복식물．
In order to investigate the resistance of Hybrid Pennisetum to heavy metals , the mass concen-trations of chloroplast pigments , soluble protein and malondialdehyde ( MDA) , the activities of superox-ide dismutase (SOD), peroxidase (POD) and catalase (CAT), and the electrolyte relative permeabili-ty of leaf membrane were studied by using Hybrid Pennisetum as the experimental materials treated by different degree of heavy metal stress .The results showed that the mass concentrations of chloroplast pig-ments and soluble protein were decreased , the MDA mass concentration and the electrolyte relative per-meability of leaf membrane were increased , and that the activities of SOD , POD and CAT were increased first and decreased later with the aggravation of heavy metal stress .The physiological and biochemical in-dexes of Hybrid Pennisetum were not affected significantly under light heavy metal stress .It still could be grown under moderate and severe heavy metal stress , showing a certain degree of tolerance .Hybrid penn-isetum can be used as remediation plant in heavy metal compound pollution area .