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ORIGINAL RESEARCH article

Front. Microbiol.
Sec. Microbiological Chemistry and Geomicrobiology
Volume 15 - 2024 | doi: 10.3389/fmicb.2024.1391553
This article is part of the Research Topic Microbial Ecological and Biogeochemical Processes in the Soil-Vadose Zone-Groundwater Habitats, Volume II View all 11 articles

Enhancement on migration and biodegradation of Diaphorobacter sp. LW2 mediated by Pythium ultimum in soil with different particle size

Provisionally accepted
Jialu Li Jialu Li 1Mei Hong Mei Hong 1Jing Lv Jing Lv 1Rui Tang Rui Tang 1Ruofan Wang Ruofan Wang 1Yadong Yang Yadong Yang 2Na Liu Na Liu 3*
  • 1 College of New Energy and Environment, Jilin University, Changchun, Hebei Province, China
  • 2 School of Environmental Science and Engineering, Yancheng Institute of Technology, Yancheng, Jiangsu, China
  • 3 College of Life Science and Technology, Jinan University, Guangzhou, China

The final, formatted version of the article will be published soon.

    The composition and structure of natural soil are very complex, leading to the difficult contact between hydrophobic organic compounds and degrading-bacteria in contaminated soil, making pollutants hard to be removed from the soil. Several researches have reported the bacterial migration in unsaturated soil mediated by fungal hyphae, but bacterial movement in soil of different particle sizes or in heterogeneous soil was unclear. The remediation of contaminated soil enhanced by hyphae still needs further research. In this case, the migration and biodegradation of Diaphorobacter sp. LW2 in soil was investigated in presence of Pythium ultimum. Hyphae could promote the growth and migration of LW2 in culture medium. It was also confirmed that LW2 was able to migrate in the growth direction and against the growth direction along hyphae. Mediated by hyphae, motile strain LW2 translocated over 3 cm in soil with different particle size (CS1, 1.0-2.0 mm; CS2, 0.5-1.0mm; MS, 0.25-0.5 mm and FS, ＜0.25 mm), and it need shorter time in bigger particle soils. In inhomogeneous soil, hyphae participated in the distribution of introduced bacteria, and the total number of bacteria increased. Pythium ultimum enhanced the migration and survival of LW2 in soil, improving the bioremediation of polluted soil. The results of this study indicate that the mobilization of degrading bacteria mediated by Pythium ultimum in soil has great potential for application in bioremediation of contaminated soil.

    Keywords: bacterial migration, Growth direction, Heterogeneous soil, Hyphae, Biodegradation of phenanthrene

    Received: 26 Feb 2024; Accepted: 02 May 2024.

    Copyright: © 2024 Li, Hong, Lv, Tang, Wang, Yang and Liu. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

    * Correspondence: Na Liu, College of Life Science and Technology, Jinan University, Guangzhou, China

    Disclaimer: All claims expressed in this article are solely those of the authors and do not necessarily represent those of their affiliated organizations, or those of the publisher, the editors and the reviewers. Any product that may be evaluated in this article or claim that may be made by its manufacturer is not guaranteed or endorsed by the publisher.