Abstract: In order to provide theoretical and scientific basis for repairing lead and zinc contaminated soil by using Alcea rosea (Linn.) Cavan.,the potted simulation experiment under lead and zinc stress was implemented. The purpose of our experiment was to explore the heavy metal enrichment characteristics and detoxification mechanism of A. rosea under lead and zinc pollution. The results showed that low-concentration lead and zinc pollution promoted the increase of plant height and leaf surface. With the increase of lead and zinc concentration,the growth of A. rosea was gradually inhibited and some of the leaves were yellow,dry,and dull. Under high concentration of heavy metal treatment,osmotic regulator was increased. Catalase (CAT) activity was reduced while peroxidase (POD) activity was increased,which could more effectively deal with the toxic effects of heavy metals. With the increase of pollution concentration,the lead absorbed by A. rosea tended to be concentrated in the roots,which weakened the transport to the upper part of the ground,while zinc was more concentrated in the leaves. At the same time,the combined pollution of lead and zinc was more toxic to plants and showed a synergistic effect. In summary,A. rosea had strong tolerance under lead and zinc pollution and the potential to repair lead and zinc contaminated soil.

Key words: Lead, Zinc, Compound pollution, Alcea rosea, Enrichment characteristics

摘要： 为选用蜀葵(Alcea rosea(Linn.)Cavan.)修复铅、锌污染土壤提供理论依据，本研究通过盆栽模拟试验，探究不同浓度铅、锌污染下蜀葵的重金属富集转运特性和耐性解毒机制。结果表明：低浓度的铅、锌污染促进蜀葵增高、叶片增大，随着污染浓度增加，蜀葵的生长受到抑制，部分叶片黄化；高浓度污染下，蜀葵渗透调节物质增多，过氧化物酶活性增加，过氧化氢酶活性减少，可更有效地应对重金属对其的毒害；随着污染浓度提高，蜀葵吸收的铅更倾向于富集在根部，而锌更多地富集在叶部。铅、锌复合污染对植株的毒性更大，表现出协同效应。因此，铅、锌污染条件下蜀葵表现出较强的耐性，具有修复铅、锌污染土壤的应用潜力。

关键词: 铅, 锌, 复合污染, 蜀葵, 富集特征