金镶玉竹对重金属铅镉的耐抗性

文章以盆栽金镶玉竹(Phyllostachys aureosulcata 'Spectabilis’)为试验材料，研究不同浓度铅、镉处理在金镶玉竹不同器官中的吸收、累积和迁移分配规律，以及铅、镉对金镶玉竹细胞膜透性、脂过氧化与抗氧化保护酶活性的影响。结果表明，在铅、镉胁迫下，根部是吸收积累重金属的最主要部位，重金属在不同器官之间的迁移分配表现出一定的差异；随着重金属处理浓度的增加，细胞质膜透性和膜脂过氧化程度增大，相对电导率和丙二醛(MDA)含量明显增加；胁迫初期抗氧化酶活性不断增加，随着胁迫时间的延长，酶活性不断下降。

Resistance of Phyllostachys aureosulcata ‘Spectabilis’ to Pb and Cd

With the potted Phyllostachys aureosulcata 'Spectabilis’ as the test material, the paper studies the rules of absorption, accumulation, migration and distribution of Pb and Cd in their different organs and the effects of Pb and Cd on the permeability, lipid peroxidation and antioxidant protective enzyme system of Ph. aureosulcata 'Spectabilis’. The results indicate that under Pb and Cd stress, the root is the most important part for heavy metal absorption and accumulation, and there are certain differences in migration and distribution of the heavy metals among different organs. The higher the treatment concentration of heavy metals, the stronger the plasma membrane permeability and membrane lipid peroxidation, and the higher the relative conductivity and MDA content. The activity of protective enzyme increases in the early stress stage, and then decreases with the extended stress time.