Croucher Institute for Environmental Sciences, Department of Biology, Hong Kong Baptist University, Kowloon Tong, Hong Kong, China.
J Hazard Mater. 2011 Feb 28;186(2-3):1206-17. doi: 10.1016/j.jhazmat.2010.11.116. Epub 2010 Dec 4.
The major aim of this experiment was to test the effects of a multi-component bioremediation system consisting of ryegrass (Lolium multiflorum), polycyclic aromatic hydrocarbons (PAHs)-degrading bacteria (Acinetobacter sp.), and arbuscular mycorrhizal fungi (Glomus mosseae) for cleaning up PAHs contaminated soil. Higher dissipation rates were observed in combination treatments: i.e., bacteria+ryegrass (BR), mycorrhizae+ryegrass (MR), and bacteria+mycorrhizae+ryegrass (BMR); than bacteria (B) and ryegrass (R) alone. The growth of ryegrass significantly (p<0.05) increased soil peroxidase activities, leading to enhanced dissipation of phenanthrene (PHE) and pyrene (PYR) from soil. Interactions between ryegrass with the two microbes further enhanced the dissipation of PHE and PYR. Mycorrhizal ryegrass (MR) significantly enhanced the dissipation of PYR from soil, PYR accumulation by ryegrass roots and soil peroxidase activities under lower PHE and PYR levels (0 and 50+50 mg kg(-1)). The present results highlighted the contribution of mycorrhiza and PAH-degrading bacteria in phytoremediation of PAH contaminated soil, however more detailed studies are needed.
本实验的主要目的是测试由黑麦草（Lolium multiflorum）、多环芳烃（PAHs）降解细菌（不动杆菌属）和丛枝菌根真菌（摩西球囊霉）组成的多组分生物修复系统对 PAHs 污染土壤的修复效果。与单独使用细菌（B）和黑麦草（R）相比，组合处理（即细菌+黑麦草（BR）、菌根+黑麦草（MR）和细菌+菌根+黑麦草（BMR））中观察到更高的降解率。黑麦草的生长显著（p<0.05）增加了土壤过氧化物酶活性，从而促进了土壤中菲（PHE）和芘（PYR）的降解。黑麦草与两种微生物之间的相互作用进一步增强了 PHE 和 PYR 的降解。菌根黑麦草（MR）在较低的 PHE 和 PYR 水平（0 和 50+50 mg kg(-1)）下，显著增强了土壤中 PYR 的降解、黑麦草根中的 PYR 积累和土壤过氧化物酶活性。本研究结果强调了菌根和 PAHs 降解细菌在 PAHs 污染土壤植物修复中的作用，但还需要更详细的研究。
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