Szent István University-Agricultural Research and Development Institute, Bikazug, Szarvas H-5540, Hungary.
Plant Physiol Biochem. 2013 Jul;68:96-103. doi: 10.1016/j.plaphy.2013.04.006. Epub 2013 Apr 23.
Phytoremediation is a plant based, cost effective technology to detoxify or stabilise contaminated soils. Fast growing, high biomass, perennial plants may be used not only in phytoremediation but also in energy production. Szarvasi-1 energy grass (Elymus elongatus subsp. ponticus cv. Szarvasi-1), a good candidate for this combined application, was grown in nutrient solution in order to assess its Cd, Cu, Ni, Pb and Zn accumulation and tolerance. Its shoot metal accumulation showed the order Pb < Ni < Cu ∼ Cd < Zn. In parallel with this, Pb and Ni had no or very little influence on the growth, dry matter content, chlorophyll concentration and transpiration of the plants. Cu and Cd treatment resulted in significant decreases in all these parameters that can be attributed to Fe plaque formation in the roots suggested by markedly increased Fe and Cu accumulation. This came together with decreased shoot and root Mn concentrations in both treatments while shoot Cu and Zn concentrations decreased under Cd and Cu exposure, respectively. Zn treatment had no effect or even slightly stimulated the plants. This may be due to a slight stimulation of Fe translocation and a very efficient detoxification mechanism. Based on the average 300 mg kg⁻¹ (dry mass) Zn concentration which is 0.03% of the shoot dry mass the variety is suggested to be classified as Zn accumulator.
植物修复是一种基于植物的、具有成本效益的技术，可用于解毒或稳定污染土壤。生长迅速、生物量大、多年生的植物不仅可用于植物修复，还可用于能源生产。作为这种联合应用的良好候选者，Szarvasi-1 能源草（Elymus elongatus subsp. ponticus cv. Szarvasi-1）在营养液中进行了种植，以评估其对 Cd、Cu、Ni、Pb 和 Zn 的积累和耐受性。其地上部分的金属积累表明，Pb < Ni < Cu ∼ Cd < Zn。与此同时，Pb 和 Ni 对植物的生长、干物质含量、叶绿素浓度和蒸腾作用没有影响或影响很小。Cu 和 Cd 处理导致所有这些参数显著下降，这归因于根部 Fe 斑块的形成，这是由根中显著增加的 Fe 和 Cu 积累所表明的。这伴随着在两种处理下地上部和根部 Mn 浓度的降低，而在 Cd 和 Cu 暴露下，地上部 Cu 和 Zn 浓度分别降低。Zn 处理没有影响，甚至略有刺激植物。这可能是由于 Fe 转运的轻微刺激和非常有效的解毒机制。根据地上部干质量平均 300 mg kg ⁻¹ （干质量）的 Zn 浓度（占地上部干质量的 0.03%），该品种被建议归类为 Zn 积累者。
