Uptake and translocation of cesium-133 in napiergrass (Pennisetum purpureum Schum.) under hydroponic conditions.
Uptake and translocation of cesium-133 in napiergrass (Pennisetum purpureum Schum.) under hydroponic conditions.
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水培条件下，napiergrass (Pennisetum purpureum Schum.) 中铯 133 的吸收和易位。
DOI：
10.1016/j.ecoenv.2012.05.017
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发表时间：
2012
影响因子：
6.8
通讯作者：
Y. Ishii
中科院分区：
文献类型：
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作者：
D. Kang;Y. Seo;Tsukasa Saito;Hiroyuki Suzuki;Y. Ishii
本研究报告了潜在的修复铯（Cs）使用狼尾草，产生最大的生物量的草本植物在水培中含有稳定的Cs（Cs-133）浓度为50，150，300，1000，和3000μM的氯化铯（CsCl），0μM的Cs作为对照浓度。在高浓度Cs处理条件下（300、1000和3000μM Cs）处理后7周（WAT），植株高度显著降低，但分蘖数与对照植株相比有增加的趋势。在整个研究期间，所有Cs处理的地上部干物质重没有观察到显著差异。Cs含量在根，叶片和叶鞘明显增加，增加Cs浓度的溶液。在3000μM浓度下，地上部分（叶片和叶鞘）的Cs含量始终高于根部。在7 WAT条件下，1000 μ M和3000 μM Cs处理的地上部分总Cs含量分别为6305和26, 365 mgkg − 1。在7 WAT条件下，地上部分的转移因子（TF）平均值分别为50μM=0.78、150μM=1.02、300μ M = 0.86、1000μM=0.68和3000μM=0.94。由于其高的Cs含量和高的TF在地上部分，狼尾草可能是一个候选的植物修复的Cs-137污染的土壤中具有很大的潜力。
The present study reports the potential remediation of cesium (Cs) using napiergrass, which produces the largest biomass among the herbaceous plants in hydroponic culture containing stable Cs (Cs-133) at concentrations of 50, 150, 300, 1000, and 3000μM using cesium chloride (CsCl), with 0μM Cs as a control concentration. Plant height was significantly decreased in higher Cs-treated conditions (300, 1000, and 3000μM Cs) at 7 weeks after treatment (WAT), but tiller numbers tended to increase compared with the control plant. No significant difference was observed in the aboveground dry matter weight in all Cs treatments throughout the study period. Cs content in the roots, leaf blades, and leaf sheaths clearly increased with increasing Cs concentration in the solutions. Cs content in the aboveground parts (leaf blades and leaf sheaths) was consistently higher than in the roots at concentration of 3000μM. Total Cs contents in the aboveground parts were 6305 and 26,365mgkg−1at 7WAT in 1000- and 3000-μM Cs treatments, respectively. Mean values of transfer factors (TFs) in the aboveground parts were 50μM=0.78, 150μM=1.02, 300μM=0.86, 1000μM=0.68, and 3000μM=0.94, respectively at 7WAT. Due to its high Cs content and high TF in the aboveground parts, napiergrass may be a candidate plant with high potential for phytoremediation of Cs from Cs-137-contaminated soil.