Key Laboratory of Ecology of Rare and Endangered Species and Environmental Protection, (Guangxi Normal University), the Ministry of Education, Guilin, China.
College of Life Science, Guangxi Normal University, Guilin, China.
Int J Phytoremediation. 2020;22(11):1156-1167. doi: 10.1080/15226514.2020.1741508. Epub 2020 Mar 23.
The seed germination plant growth parameters and level of heavy metal accumulation were investigated in pakchoi cultured in four contaminated soils with different levels of heavy metals supplemented with citric acid (CA) or calcium phosphate (CP). Results showed that the seed germination energy, germination percentage and germination index parameters were similar, while the seed vigor (SV) significantly ( < 0.05) decreased as the soil pollution level increased. The lengths of the shoots and roots presented the same trend as SV. All the seedlings grew in heavily polluted soil without any amendments before harvesting; therefore, no plant material was available for subsequent analyses. The photosynthesis parameters of pakchoi cultured in lightly polluted soil without amendment (LPS), lightly polluted soil with CA (LPSA) and moderately polluted soil with CP (MPSP) were similar. The concentrations of Pb, Zn, Mn, Cu and Cd in the shoots, roots and whole plants were in the order of MPSP > LPSA > LPS. Pakchoi cultured in MPSP showed the most promising results in terms of plant height, biomass and heavy metal accumulation. Pakchoi presented the highest translocation and bioaccumulation factors for Cd and the lowest for Pb.HighlightsSoil pollution and the type of chemical amendment had no effect on the seed germination of pakchoi.Citric acid addition in lightly polluted soil improved pakchoi growth and heavy metal extraction.Pakchoi cultured in moderately polluted soil with calcium phosphate amendment presented the highest biomass and heavy metal concentration.
研究了在四种不同重金属污染水平的土壤中添加柠檬酸（CA）或磷酸钙（CP）培养的小白菜的种子发芽、植物生长参数和重金属积累水平。结果表明，种子发芽活力、发芽率和发芽指数参数相似，而随着土壤污染水平的增加，种子活力（SV）显著（<0.05）降低。芽和根的长度呈现出与 SV 相同的趋势。所有幼苗都在未进行任何改良的重度污染土壤中生长，直到收获时才进行处理，因此，没有可用于后续分析的植物材料。在未改良的轻度污染土壤（LPS）、添加 CA 的轻度污染土壤（LPSA）和添加 CP 的中度污染土壤（MPSP）中培养的小白菜的光合作用参数相似。在芽、根和整株植物中，Pb、Zn、Mn、Cu 和 Cd 的浓度顺序为 MPSP>LPSA>LPS。在 MPSP 中培养的小白菜在株高、生物量和重金属积累方面表现出最有前景的结果。小白菜对 Cd 的转运和生物积累系数最高，对 Pb 的最低。
