Acacia auriculiformis Cunn. Ex Benth As Phytoextraction Agent: A Growth Response, Physiological Tolerance and Lead Removal Capability Evaluation

[摘要] This study was conducted to determine A. auriculiformis capability to tolerate elevated Pb concentration. The uptake, distribution, and the capability of A. auriculiformis plant to remove lead (Pb) Pb from the soil was assessed, as well as the growth performance, and some physiological parameters of the plant. The results revealed that Pb toxicity has no effect on A. auriculiformis plant growth up to 1 g/kg of soil, with the maximum amount of Pb absorbed in soil treated with 1 g/kg of Pb. The bioconcentration factor (BCF), and translocation factor (TF) values were 0.78 and 3.55 respectively, indicating that A. auriculiformis is an ideal phytoremediator for soils containing 1 g/kg Pb. In conclusion, A. auriculiformis exposed to high Pb concentration (1 g/kg of soil) showed good growth and development, thereby a high tolerance capacity, so it is a suitable candidate for Pb phytoremediation over the short or medium term.

[学科分类] 生物科学（综合）

[关键词] Proline;Catalase;transpiration rate;net photosynthesis;bioconcentration factor;translocation factor