The growth response, tolerance, and enrichment characteristics of six ornamental species, Chlorophytum comosum, Calendula officinalis, Iris lacteal, Belamcanda chinensis, Saponaria officinalis, and Polygonum lapathifolium were studied under hydroponic culture with lead (Pb) concentrations ranging from 0 to 1000 mg/L. The results showed that the growth of the tested ornamental species under Pb stress was inhibited. Belamcanda chinensis presented the largest tolerance index (0.75), and Calendula officinalis had the highest toxicity threshold (500 mg/L) under Pb stress. The highest Pb contents in the shoots were detected in Iris lacteal and Belamcanda chinensis. The enrichment coefficients in the shoots of Iris lacteal and Belamcanda chinensis were significantly higher than those in the other ornamental species. In conclusion, Iris lacteal and Belamcanda chinensis are the most tolerant and have the greatest Pb enrichment and translocation abilities under Pb stress, and thus, they have a strong potential to restore Pb-contaminated water bodies and soils.
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The authors acknowledge the National Natural Science Foundation of China (Grant No. 41471196) and the Science and Technology Innovation Foundation for Undergraduates of Jilin Agricultural University.
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Lu, W., Li, Z., Shao, Z. et al. Lead Tolerance and Enrichment Characteristics of Several Ornamentals Under Hydroponic Culture. Bull Environ Contam Toxicol 105, 166–172 (2020). https://doi.org/10.1007/s00128-020-02905-x
- Lead pollution
- Ornamental plant
- Hydroponic culture