Mycelia Promote Active Transport and Spatial Dispersion of Polycyclic Aromatic Hydrocarbons

详细信息    查看全文

• 作者：Shoko Furuno ; Susan Foss ; Ed Wild ; Kevin C. Jones ; Kirk T. Semple ; Hauke Harms ; Lukas Y. Wick
• 刊名：Environmental Science & Technology (ES&T)
• 出版年：2012
• 出版时间：May 15, 2012
• 年：2012
• 卷：46
• 期：10
• 页码：5463-5470
• 全文大小：356K
• 年卷期：v.46,no.10(May 15, 2012)
• ISSN：1520-5851

文摘

To cope with heterogeneous subsurface environments mycelial microorganisms have developed a unique ramified growth form. By extending hyphae, they can obtain nutrients from remote places and transport them even through air gaps and in small pore spaces, repectively. To date, studies have been focusing on the role that networks play in the distribution of nutrients. Here, we investigated the role of mycelia for the translocation of nonessential substances, using polycyclic aromatic hydrocarbons (PAHs) as model compounds. We show that the hyphae of the mycelial soil oomycete Pythium ultimum function as active translocation vectors for a wide range of PAHs. Visualization by two-photon excitation microscopy (TPEM) demonstrated the uptake and accumulation of phenanthrene (PHE) in lipid vesicles and its active transport by cytoplasmic streaming of the hyphae (鈥榟yphal pipelines鈥?. In mycelial networks, contaminants were translocated over larger distances than by diffusion. Given their transport capacity and ubiquity, hyphae may substantially distribute remote hydrophobic contaminants in soil, thereby improving their bioavailability to bacterial degradation. Hyphal contaminant dispersal may provide an untapped potential for future bioremediation approaches.