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Isolation, Identification and Characteristic Analysis of Plant Endophyte Electrogenic Bacteria Shinella zoogloeoides SHE10

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Abstract

Electroactive microorganisms play a significant role in microbial fuel cells (MFCs). These devices are environmentally friendly and can turn large quantities of organic material into renewable energy based on microbial diversity. Based on broad microbial diversity, it is necessary to obtain a comprehensive understanding of their resource distribution and to discover potential resources. In this study, sweet potato tissues were selected to isolate endophytic bacteria, and the electrochemical activity potential of those bacteria was evaluated by high-throughput screening with a WO3 nanoprobe. This study was screened and obtained a strain SHE10 with electrochemical performance from the rhizome of sweet potato by a WO3 nanoprobe, which was identified as Shinella zoogloeoides. After nearly 600 h of voltage monitoring and cyclic voltammetry analysis, the results showed that the average voltage of S. zoogloeoides SHE10 reached 122.5 mV in stationary period. The maximum power density is 78.3 ± 1.8 mW/m2, and the corresponding current density is 223.0 mA/m2. The good redox reaction also indicated that the strain had good electrical activity. Its electron transfer mode was diverse, but its power generation mechanism still needs to be further discussed. The study of S. zoogloeoides SHE10 provides scientific theoretical reference for expanding the resource pool of electroproducing bacteria and the types of electroproducing microorganisms.

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Acknowledgements

We are grateful to Northwest Normal University for its cooperation with this study.

Funding

This work was supported in part by Lanzhou Science and Technology Plan Project 2018–1-104; Special funds for guiding the Development of Scientific and technological Innovation in Gansu Province 2019ZX-05; Industrial support Plan Project of Colleges and Universities in Gansu Province 2020C-21.

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Authors and Affiliations

  1. College of Life Science, Northwest Normal University, Lanzhou, 730070, People’s Republic of China

    Lijun Ling, Hong Luo, Zibin Li, Caiyun Yang, Mingmei Pang, Yixin Tu, Wenting Cheng, Kunling Jiang & Lu Lu

  2. Bioactive Products Engineering Research Center for Gansu Distinctive Plants, Northwest Normal University, Lanzhou, 730070, People’s Republic of China

    Lijun Ling, Hong Luo, Zibin Li, Caiyun Yang, Mingmei Pang, Yixin Tu, Wenting Cheng, Kunling Jiang & Lu Lu

  3. Northwest Normal University, No.967, Anning East Road, Lanzhou City, China

    Lijun Ling

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All authors contributed to the study conception and design. Material preparation, data collection, and analysis were performed by HL, CY, ZL, and LL. The first draft of the manuscript was written by HL and all authors commented on previous versions of the manuscript. All authors read and approved the final manuscript.

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Correspondence to Lijun Ling.

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Ling, L., Luo, H., Li, Z. et al. Isolation, Identification and Characteristic Analysis of Plant Endophyte Electrogenic Bacteria Shinella zoogloeoides SHE10. Curr Microbiol 79, 268 (2022). https://doi.org/10.1007/s00284-022-02964-9

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