Hu Bo, Hu Shanshan, You Lexing, Chen Zhongbing
College of Geography and Environmental Sciences, Zhejiang Normal University, Jinhua 321004, China.
College of Geography and Environmental Sciences, Zhejiang Normal University, Jinhua 321004, China.
J Hazard Mater. 2025 May 5;488:137396. doi: 10.1016/j.jhazmat.2025.137396. Epub 2025 Jan 28.
This study investigates the role of arbuscular mycorrhizal fungi (AMF) in the metabolism of hexabromocyclododecane (HBCD) and its ecological effects in contaminated environments. We focused on the symbiotic relationships between Iris pseudacorus L. and AMF (Rhizophagus irregularis) under HBCD exposure. Our results show that HBCD induces oxidative damage, which hinders plant growth. However, AMF significantly enhance the plant's antioxidant defenses, reducing oxidative damage and supporting better growth of I. pseudacorus. HBCD biodegradation patterns showed β- > γ- > α-HBCD, with AMF playing a key role in stabilizing rhizosphere microbial communities, particularly promoting Proteobacteria and potential bacterial degraders like Aeromonas and Trichococcus, which contributed to HBCD removal. Additionally, AMF appear to upregulate genes such as cypD_E, GST, dehH, dehA, dehM, Em3.8.1.2, and ligB, which are involved in debromination and hydroxylation reactions. This research highlights AMF's potential to enhance the phytoremediation of HBCD, providing valuable insights for environmental remediation strategies.
本研究调查了丛枝菌根真菌（AMF）在六溴环十二烷（HBCD）代谢中的作用及其在受污染环境中的生态效应。我们重点关注了在HBCD暴露下黄菖蒲与AMF（不规则球囊霉）之间的共生关系。我们的结果表明，HBCD会引发氧化损伤，从而阻碍植物生长。然而，AMF能显著增强植物的抗氧化防御能力，减少氧化损伤，并支持黄菖蒲更好地生长。HBCD的生物降解模式为β- > γ- > α-HBCD，AMF在稳定根际微生物群落方面发挥着关键作用，特别是促进了变形菌门以及潜在的细菌降解者（如气单胞菌属和四联球菌属）的生长，这些微生物有助于HBCD的去除。此外，AMF似乎上调了cypD_E、GST、dehH、dehA、dehM、Em3.8.1.2和ligB等基因，这些基因参与脱溴和羟基化反应。本研究突出了AMF在增强HBCD植物修复方面的潜力，为环境修复策略提供了有价值的见解。
