Int J Phytoremediation. 2014;16(6):582-92. doi: 10.1080/15226514.2013.798624.
To assess the potential of Pb+2 accumulation in different parts of Acacia victoria, one year old A. victoria seedlings were exposed to Pb2+(NO3)2 in 5 different concentrations: 0, 50, 250, 500 and 1000 (mg Pb2+ L(-1)) for 45 days. Subsequently, Pb2+ uptake was quantified in roots, shoots and leaves of the seedlings by Atomic Absorption Spectroscopy (AAS). In addition, some physiological parameters such as biomass production, shoots and roots length, plant appearance, tissue concentrations and chlorophyll content were examined. Tissue concentrations increased as Pb2+ concentration increased for A. victoria. The visible toxicity symptoms (chlorosis and necrosis) appeared only to the highest concentration (1000 mg Pb2+ L(-1)), resulting in photosynthesis decrease, plant height, root length and dry biomass reduction. Almost 70% (up to 3580 mg Kg(-1) of dry tissue) from the Pb2+ was accumulated in the entire plant tissues was retained in the roots in the seedlings exposed to 1000 mg Pb2+ L(-1). The seedlings accumulated between 403 to 913 mg Kg(-1) of Pb2+ in shoots and 286 to 650 mg Kg(-1) of Pb2+ in leaves at different treatments. Bioconcentration and translocation factors were determined 5.14 and 0.255, respectively. The results show that A. victoria is suitable for lead-phytostabilization in Pb(2+) -contaminated soil.
为了评估 Pb+2 在维多利亚相思树不同部位积累的潜力，将 1 年生的维多利亚相思树幼苗暴露于 5 种不同浓度的 Pb2+(NO3)2 中：0、50、250、500 和 1000（mg Pb2+ L(-1)) 45 天。随后，通过原子吸收光谱法（AAS）定量测定幼苗根部、茎部和叶片中的 Pb2+吸收量。此外，还检查了一些生理参数，如生物量生产、茎和根长度、植物外观、组织浓度和叶绿素含量。随着 Pb2+浓度的增加，组织浓度增加。只有在最高浓度（1000 mg Pb2+ L(-1))时，才会出现明显的毒性症状（黄化和坏死），导致光合作用下降、株高、根长和干生物量减少。暴露于 1000 mg Pb2+ L(-1)的幼苗中，近 70%（高达 3580 mg Kg(-1)干组织）的 Pb2+保留在根部。幼苗在不同处理中积累的 Pb2+量在茎部为 403 至 913 mg Kg(-1)，在叶片中为 286 至 650 mg Kg(-1)。生物浓缩和转运系数分别为 5.14 和 0.255。结果表明，维多利亚相思树适合用于 Pb(2+)污染土壤的铅植物稳定化。
