College of Resources and Environment, Shandong Agricultural University, Taian, 271018, China.
Environ Geochem Health. 2024 Oct 14;46(11):473. doi: 10.1007/s10653-024-02255-1.
The novel brominated flame retardant decabromodiphenyl ethane (DBDPE) has biological toxicity, persistence, long-range migration and bioaccumulation ability. However, there is currently little research on the phytotoxicity of DBDPE in plants. The perennial herbaceous plant tall fescue (Festuca elata Keng ex E. B. Alexeev) was selected as the model organism for use in seed germination experiments, and the phytotoxicity of DBDPE in the soil of tall fescue was studied. The results indicated that DBDPE had a significant effect on the germination and growth of tall fescue seedlings. Citric acid reduced the stress caused by DBDPE in plants, effectively alleviating the phytotoxicity of DBDPE in tall fescue. The root vitality and protein content significantly increased after the application of citric acid, increasing by 74.93-183.90%, 146.44-147.67%, respectively. The contents of proline and soluble sugars significantly decreased after the application of citric acid, decreasing by 45.18-59.69% and 23.03%, respectively (P < 0.05). There was no significant difference in superoxide dismutase (SOD) or peroxidase (POD) activity in tall fescue seedlings, and the catalase (CAT) activity and malondialdehyde (MDA) content were significantly lower after the application of citric acid, decreasing by 64.62-67.91% and 29.10-49.80%, respectively (P < 0.05). Tall fescue seedlings bioaccumulated DBDPE, with biological concentration factors (BCFs) ranging from 4.28 to 18.38 and transfer factors (TFs) ranging from 0.43 to 0.54. This study provides theoretical support for the study of the toxicity of DBDPE to plants and offers a research foundation for exploring the phytoremediation of DBDPE-contaminated soil by tall fescue.
新型溴化阻燃剂十溴二苯乙烷（DBDPE）具有生物毒性、持久性、远距离迁移性和生物累积性。然而，目前关于 DBDPE 对植物的植物毒性的研究较少。本研究选择多年生草本植物高羊茅（Festuca elata Keng ex E. B. Alexeev）作为模式生物，进行种子萌发实验，研究 DBDPE 对高羊茅土壤的植物毒性。结果表明，DBDPE 对高羊茅幼苗的萌发和生长有显著影响。柠檬酸降低了 DBDPE 对植物的胁迫作用，有效缓解了 DBDPE 对高羊茅的植物毒性。柠檬酸处理后，根活力和蛋白质含量分别显著增加了 74.93-183.90%和 146.44-147.67%。柠檬酸处理后，脯氨酸和可溶性糖含量显著降低，分别降低了 45.18-59.69%和 23.03%（P<0.05）。高羊茅幼苗中超氧化物歧化酶（SOD）和过氧化物酶（POD）活性无显著差异，柠檬酸处理后过氧化氢酶（CAT）活性和丙二醛（MDA）含量显著降低，分别降低了 64.62-67.91%和 29.10-49.80%（P<0.05）。高羊茅幼苗对 DBDPE 具有生物累积性，生物浓缩因子（BCFs）范围为 4.28-18.38，转移因子（TFs）范围为 0.43-0.54。本研究为 DBDPE 对植物毒性的研究提供了理论支持，为探索高羊茅修复 DBDPE 污染土壤提供了研究基础。
