丁香蓼对Cu富集效应的研究

Research on the Copper Enrichment Effect of Ludwigia Prostrata Roxb

通过盆栽实验研究不同浓度的Cu胁迫对丁香蓼响应和富集效应的影响,结果表明,随着Cu的浓度增加,丁香蓼的株高和生物量降低,长势减弱,但在低浓度(ω(Cu)为125 mg/kg)时降低不明显,与对照组差异性不显著,高浓度与对照组差异性显著。根茎叶中Cu含量随着添加的Cu浓度增加而增加,Cu的含量和富集系数都表现为根>叶>茎,对Cu的积累量表现为根、茎>叶,丁香蓼不是Cu的超富集植物,但对Cu具有较好富集作用和忍耐能力。

Pot experiment is conducted to study effect and accumulation of copper on Ludwigia prostrata Roxb, Results showed that Growth, height and biomass of Ludwigia prostrata Roxb fall as the increasing of copper concentration. But when Cu was at low concentration of 125 mg/kg, reduction is not apparent and the difference is more inconspicuous than CK,while it is not at high concentration. Copper contents of root,stems and leaf are increasing with the increase of copper concentration added into soil. The content and enriched coefficient of copper are root〉 leaf 〉Stems. Copper accumulation in the root or stems is more than in leaf. so Ludwigia prostrata Roxb is not hyperaccumulator,but has good enrichment and patience ability.