The performance of bioelectrochemically assisted constructed wetland systems planted with Arundo donax were evaluated at applied voltages of 1, 2, 3 and 5 V. The RGR and Proline (Pro) results implied a positive response at the proper applied voltage. In the 3-V group, the RGR sharply climbed to a maximum over two stages, and the Pro reached a higher level of 256.25 μg/g at the end of the first stage without an additional organic carbon source. This result indicated that A. donax was attempting to adapt the 3-V stress via physiological self-regulation and the growth was nearly unaffected. However, in the 5-V group, the great increase in Pro and withering of the aboveground A. donax showed that the voltage stress had become lethal and the plant was not able to endure it through physiological regulation. In addition, Anodic microbial community compositions accumulating on graphite felts were analyzed via high-throughput sequencing. Results showed that there were two clear clusters at different applied voltages. One cluster was assembled from the anodic region of the 0-V and 1-V groups, and the other was collected from the 2-V and 3-V samples. At the phylum level, Proteobacteria, Firmicutes and Bacteroidetes were the most common phyla among the samples. However, at the genus level, the dominant genera varied with the applied voltage. The relative abundance of Desulfovibrio increased with increased applied voltage. The highest total nitrogen removal rate in the 2-V group was closely related to the high abundance of the Acinetobacter genus. Moreover, Exiguobacterium became dominant only in the 5-V sample, suggesting that this genus strongly depended on the interactive environment of exudes from A. donax and applied voltage.

在施加电压分别为1、2、3和5 V的情况下，评估了用Arundo Donax种植的生物电化学辅助人工湿地系统的性能。RGR和脯氨酸（Pro）结果表明在适当的施加电压下具有正响应。在3-V组中，RGR在两个阶段中急剧上升到最大值，并且Pro在第一阶段结束时达到了256.25μg/ g的更高水平，而没有额外的有机碳源。该结果表明，A.donax正试图通过生理学自我调节来适应3-V胁迫，并且其生长几乎不受影响。但是，在5-V组中，Pro的大量增加和地上的A. donax的枯萎表明电压胁迫已经致命，植物无法通过生理调节来忍受。此外，通过高通量测序分析了积聚在石墨毡上的阳极微生物群落组成。结果表明，在不同的施加电压下有两个清晰的簇。一个簇是从0-V和1-V组的阳极区域组装而成的，另一个簇是从2-V和3-V样品中收集的。在门水平上，变形杆菌，硬毛菌和拟杆菌是样品中最常见的门。但是，在属水平上，优势属随施加电压而变化。脱硫弧菌的相对丰度随着施加电压的增加而增加。2-V组中最高的总氮去除率与不动杆菌属的高丰度密切相关。此外，Exiguobacterium仅在5 V样品中占主导地位，这表明该属强烈依赖于A. donax和所施加电压的相互作用环境。