@article{ijebb2016421,
author={{Ite, Aniefiok E. and Adebisi, Olusoji O. and Hanney, Nicola F. and Semple, Kirk T.},
title={The Effect of Rhizosphere Soil and Root Tissues Amendment on Microbial Mineralisation of Target <SUP>14</SUP>C每Hydrocarbons in Contaminated Soil},
journal={International Journal of Environmental Bioremediation & Biodegradation},
volume={4},
number={2},
pages={21--34},
year={2016},
url={http://pubs.sciepub.com/ijebb/4/2/1},
issn={2333-8636},
abstract={The effect of rhizosphere soil or root tissues amendments on the microbial mineralisation of hydrocarbons in soil slurry by the indigenous microbial communities has been investigated. In this study, rhizosphere soil and root tissues of reed canary grass (<i>Phalaris arundinacea</i>), channel grass (<i>Vallisneria spiralis</i>), blackberry (<i>Rubus fructicosus</i>) and goat willow (<i>Salix caprea</i>) were collected from the former Shell and Imperial Industries (ICI) Refinery site in Lancaster, UK. The rates and extents of <SUP>14</SUP>C每hydrocarbons (naphthalene, phenanthrene, hexadecane or octacosane) mineralisation in artificially spiked soils were monitored in the absence and presence of 5% (wet weight) of rhizosphere soil or root tissues. Respirometric and microbial assays were monitored in fresh (0 d) and pre每incubated (28 d) artificially spiked soils following amendment with rhizosphere soil or root tissues. There were significant increases (<i>P</i> &lt; 0.001) in the extents of <SUP>14</SUP>C每naphthalene and <SUP>14</SUP>C每phenanthrene mineralisation in fresh artificially spiked soils amended with rhizosphere soil and root tissues compared to those measured in unamended soils. However, amendment of fresh artificially spiked soils with rhizosphere soil and root tissues did not enhance the microbial mineralisation of<SUP> 14</SUP>C每hexadecane or <SUP>14</SUP>C每octacosane by indigenous microbial communities. Apart from artificially spiked soil systems containing naphthalene (amended with reed canary grass and channel grass rhizosphere) and hexadecane amended with goat willow rhizosphere, microbial mineralisation of hydrocarbons was further enhanced following 28 d soil每organic contaminants pre每exposure and subsequent amendment with rhizosphere soil or root tissues. This study suggests that organic chemicals in roots and/or rhizosphere can enhance the microbial degradation of petroleum hydrocarbons in freshly contaminated soil by supporting higher numbers of hydrocarbon每degrading populations, promoting microbial activity and/or enhancing bioavailability of organic contaminants.},
doi={10.12691/ijebb-4-2-1}
publisher={Science and Education Publishing}
}