Prabha D, Sivakumar S, Subbhuraam C V, Son H K
Department of Environmental Sciences, Bharathiar University, Coimbatore, India.
Department of Bioenvironmental Energy, College of Natural Resource and Life Science, Pusan National University, Miryang-si, South Korea
Toxicol Ind Health. 2015 May;31(5):412-21. doi: 10.1177/0748233713475502. Epub 2013 Jan 30.
The present study was investigated to evaluate the uptake and accumulation of selenium (Se) by the stem cuttings of Portulaca oleracea L. grown in alfisol amended with various concentrations of Se. P. oleracea accumulated a maximum of 63.4 µg g(-1) dry weight in a short growth period of 42 days. The order of accumulation of Se among the plant parts was leaves (31.5 μg g(-1)) > stems (16.4 μg g(-1)) > roots (15.5 μg g(-1)). The accumulation potential was fourfold higher than the plant available concentration of 15.2 μg g(-1) of Se g(-1) of soil (diethylenetriaminepentaacetic acid extracted). Although the plant was able to accumulate Se in their tissues, increase in Se concentrations in soil caused a concentration-dependent decrease in the growth rate of plants (regeneration of leaves, number of leaves, number of roots, root length, stem length and biomass).
本研究旨在评估在添加不同浓度硒的淋溶土中生长的马齿苋茎段对硒的吸收和积累情况。马齿苋在42天的短生长周期内积累了高达63.4μg g(-1)干重的硒。植物各部位硒的积累顺序为叶片（31.5μg g(-1)）>茎（16.4μg g(-1)）>根（15.5μg g(-1)）。积累潜力比土壤中植物有效硒浓度15.2μg g(-1)（二乙烯三胺五乙酸提取）高四倍。尽管植物能够在其组织中积累硒，但土壤中硒浓度的增加导致植物生长速率呈浓度依赖性下降（叶片再生、叶片数量、根数量、根长度、茎长度和生物量）。
