Articles | Volume 16, issue 7
https://doi.org/10.5194/bg-16-1433-2019
https://doi.org/10.5194/bg-16-1433-2019
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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Cited articles

Amonette, J. E.: Improvements to the quantitative assay of nonrefractory minerals for Fe(II) and total Fe using 1,10-Phenanthroline, Clay. Clay Miner., 46, 51–62, 1998. 
Amonette, J. E., Russell, C. K., Carosino, K. A., Robinson, N. L., and Ho, J. T.: Toxicity of Al to desulfovibrio desulfuricans, Appl. Environ. Microbiol., 69, 4057–4066, 2003. 
Braunschweig, J., Bosch, J., and Meckenstock, R. U.: Iron oxide nanoparticles in geomicrobiology: from biogeochemistry to bioremediation, New Biotechnol., 30, 793–802, 2013. 
Chesworth, W.: Encyclopedia of Soil Science, Springer, Dordrecht, 363–369, 2008. 
Cornell, R. M. and Schwertmann, U.: The iron oxides: structure, properties, reactions, occurences and uses, Wiley-VCH Verlag GmbH & Co. KGaA, 2003. 
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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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