Living plants transport substantial amts. of org. material into the soil. This process, called rhizodeposition, provides the substrate for the rhizospheric microbial community. A lab.-scale sediment microbial fuel cell - the anode is positioned in the rhizosphere of the rice plants - was used to microbially oxidize the plant-derived orgs. An elec. current was generated through the in situ oxidn. of rhizodeposits from living rice plants. The elec. power output of a sediment microbial fuel cell is a factor 7 higher in the presence of actively growing plants. This process offers the potential of light-driven power generation from living plants in a nondestructive way. Sustainable power productions up to 330 W/ha can be attributed to the oxidn. of the plant-derived compds.
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