Wang Xu, Chen Can, Wang Jianlong
a Collaborative Innovation Center for Advanced Nuclear Energy Technology (INET), Tsinghua University , Beijing , P.R. China.
b Beijing Key Laboratory of Radioactive Waste Treatment , INET, Tsinghua University , Beijing , P.R. China.
Int J Phytoremediation. 2017 Apr 3;19(4):402-412. doi: 10.1080/15226514.2016.1244158.
Cs accumulation characteristics by Sorghum bicolor were investigated in hydroponic system (Cs level at 50-1000 μmol/L) and in soil (Cs-spiked concentration was 100 and 400 mg/kg soil). Two varieties of S. bicolor Cowly and Nengsi 2# grown on pot soil during the entire growth period (100 days) did not show significant differences on the height, dry weight (DW), and Cs accumulation. S. bicolor showed the potential phytoextraction ability for Cs-contaminated soil with the bioaccumulation factor (BCF) and the translocation factor (TF) values usually higher than 1 in soil system and in hydroponic system. The aerial parts of S. bicolor contributed to 86-92% of the total removed amounts of Cs from soil. Cs level in solution at 100 μmol/L gave the highest BCF and TF values of S. bicolor. Cs at low level tended to transfer to the aerial parts, whereas Cs at high level decreased the transfer ratio from root to shoot. In soil, the plant grew well when Cs spiked level was 100 mg/kg soil, but was inhibited by Cs at 400 mg/kg soil with Cs content in sorghum reaching 1147 mg/kg (roots), 2473 mg/kg (stems), and 2939 mg/kg (leaves). In hydroponic system, average Cs level in sorghum reached 5270 mg/kg (roots) and 4513 mg/kg (aerial parts), without significant damages to its biomass at 30 days after starting Cs treatment. Cs accumulation in sorghum tissues was positively correlated with the metal concentration in medium.
在水培系统（铯水平为50 - 1000 μmol/L）和土壤（铯添加浓度为100和400 mg/kg土壤）中研究了双色高粱对铯的积累特性。在盆栽土壤中生长整个生育期（100天）的两个双色高粱品种考利和能斯2号，在株高、干重和铯积累方面没有显著差异。双色高粱对铯污染土壤表现出潜在的植物提取能力，在土壤系统和水培系统中，其生物积累因子（BCF）和转运因子（TF）值通常高于1。双色高粱地上部分对从土壤中去除的铯总量贡献了86 - 92%。溶液中铯水平为100 μmol/L时，双色高粱的BCF和TF值最高。低水平的铯倾向于转移到地上部分，而高水平的铯降低了从根到茎的转移率。在土壤中，当铯添加水平为100 mg/kg土壤时，植株生长良好，但在铯含量为400 mg/kg土壤时受到抑制，高粱中的铯含量达到1147 mg/kg（根）、2473 mg/kg（茎）和2939 mg/kg（叶）。在水培系统中，铯处理开始30天后，高粱中的平均铯水平达到5270 mg/kg（根）和4513 mg/kg（地上部分），对其生物量没有显著损害。高粱组织中的铯积累与培养基中的金属浓度呈正相关。
