摘要
本文采用植物根系生物量、根系内活性氧清除酶活性变化和植物表观中毒症状作指标 ,研究了 Cd毒害对草坪植物的毒性作用、根系应激反应。结果表明 ,当土壤溶液中 Cd浓度达 1.5× 10 - 3mol· dm- 3时 ,植物体内活性氧代谢、生长状况将出现异常 ,甚至出现明显的表观中毒症状。 Cd对植物体内清除酶活性的毒性强度为 CAT>SOD>POD。匍匐翦股颖 (Agrostis stolonifera)根系对 Cd毒害的抵抗作用强于多年生黑麦草 (L olium perernne)。
Physiological and biochemical effects of cadmium stress on two species of lawns plant root system were tested.The results showed when cadmium concentration in the nutrient solution was above 1.5×10 -3 mol·dm -3 ,the enzyme activity of SOD,CAT,POD was inhibited.And the plants root quantities decreased.The Cadmium was more pernicious to the enzyme actirity of SOD than that of POD,and was the rnost pernicions to that of CAT.The fastness of creeping bent root was greater than that of perennial ryegrass to cadmium toxicity.
出处
《重庆环境科学》
北大核心
2003年第11期51-52,67,共3页
Chongqing Environmental Science
基金
贵州大学自然科学基金课题 (贵大基 [1 999] 0 1 4号 )
关键词
镉
植物根系
清除酶
匍匐翦股颖
多年生黑麦草
cadmium
the plant root system
anti-oxidize protecting enzyme
perennial ryegrass
creeping bent
