Zhu Lizhong, Zhang Ming
Department of Environmental Science, Zhejiang University, Hangzhou, Zhejiang 310028, China.
Environ Pollut. 2008 Nov;156(1):46-52. doi: 10.1016/j.envpol.2008.01.004. Epub 2008 Feb 20.
A hydroponic experiment was conducted to investigate the effect of rhamnolipids, a biosurfactant, on the uptake of polycyclic aromatic hydrocarbons (PAHs) by ryegrass. Results showed that rhamnolipids could enhance the uptake of PAHs by ryegrass roots. With increasing concentration of rhamnolipids, the PAH content in ryegrass roots initially increased and then decreased, while the PAH content in ryegrass shoots did not change. Batch studies also showed that the sorption of phenanthrene by fresh ryegrass roots was dependent on rhamnolipid concentration and showed the same trends as the uptake experiment. The increase of permeability of ryegrass root cells with the increase of rhamnolipid concentration may lead to the initial enhancement of PAH content in ryegrass roots, and the decrease of PAH adsorption onto the root surface with further increase of rhamnolipids led to the decrease of PAH content in ryegrass roots.
进行了一项水培实验，以研究生物表面活性剂鼠李糖脂对黑麦草吸收多环芳烃（PAHs）的影响。结果表明，鼠李糖脂可以增强黑麦草根对PAHs的吸收。随着鼠李糖脂浓度的增加，黑麦草根中PAH含量先增加后减少，而黑麦草茎中PAH含量没有变化。批次研究还表明，新鲜黑麦草根对菲的吸附取决于鼠李糖脂浓度，并且呈现出与吸收实验相同的趋势。随着鼠李糖脂浓度的增加，黑麦草根细胞通透性的增加可能导致黑麦草根中PAH含量最初增加，而随着鼠李糖脂进一步增加，PAH在根表面的吸附减少导致黑麦草根中PAH含量降低。
