Biogeosciences
Biogeosciences
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Articles | Volume 16, issue 7
Articles | Volume 16, issue 7
https://doi.org/10.5194/bg-16-1433-2019
© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/bg-16-1433-2019
© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 16, issue 7
Research article
 | 
08 Apr 2019
Research article |  | 08 Apr 2019

Iron minerals inhibit the growth of Pseudomonas brassicacearum J12 via a free-radical mechanism: implications for soil carbon storage

Hai-Yan Du, Guang-Hui Yu, Fu-Sheng Sun, Muhammad Usman, Bernard A. Goodman, Wei Ran, and Qi-Rong Shen

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Short summary
Mineral binding is a major mechanism for soil carbon (C) stabilization. However, soil minerals can also inhibit the growth of bacteria that protect organic C from decay. Here the findings indicate that reduced surface Fe(II) derived from Fe(III)-containing minerals inhibits the growth of bacteria via a free-radical mechanism, which may serve as an ubiquitous mechanism between iron minerals and all of the heterotrophic bacteria in view of bacteria as a vast source of superoxide.
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