Comparative analysis of the seed germination of pakchoi and its phytoremediation efficacy combined with chemical amendment in four polluted soils.,International Journal of Phytoremediation

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Comparative analysis of the seed germination of pakchoi and its phytoremediation efficacy combined with chemical amendment in four polluted soils.
International Journal of Phytoremediation ( IF 3.4 ) Pub Date : 2020-03-23 , DOI: 10.1080/15226514.2020.1741508
Chunming Li _{1,

2} , Fangming Yu _{1,

3} , Yi Li _{1,

3} , Wei Niu _{1,

2} , Jingxian Li _{1,

3} , Jing Yang _{1,

2} , Kehui Liu _{1,

2}

Affiliation

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 (p < 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.

Highlights
Soil 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.

中文翻译：

四种污染土壤中小菜种子萌发及其与化学改良相结合的植物修复功效的比较分析。

在4种受污染的土壤中，用不同的重金属水平补充柠檬酸（CA）或磷酸钙（CP），对小菜中的种子发芽植物生长参数和重金属积累水平进行了研究。结果表明，种子发芽能，发芽率和发芽指数参数相似，而种子活力（SV）显着（p <0.05）随着土壤污染水平的增加而降低。芽和根的长度呈现与SV相同的趋势。所有幼苗均在污染严重的土壤中生长，收获前未经任何处理。因此，没有植物材料可用于后续分析。在无修饰的轻度污染土壤（LPS），CA的轻度污染土壤（LPSA）和CP的中度污染土壤（MPSP）上种植的小菜的光合作用参数相似。芽，根和整株植物中的铅，锌，锰，铜和镉的含量依次为MPSP> LPSA> LPS。MPSP培养的小白菜在株高，生物量和重金属积累方面显示出最有希望的结果。小白菜呈现出最高的Cd转运和生物积累因子，而Pb最低。