Pseudomonas aeruginosa-accelerated corrosion of Mo-bearing low-alloy steel through molybdenum-mediating chemotaxis and motility

Zhangwei Guo; Zeyun Chai; Tao Liu; Shan Gao; Xinrui Hui; Caiyi Zhang; Na Guo; Lihua Dong

doi:10.1016/j.bioelechem.2021.108047

Pseudomonas aeruginosa-accelerated corrosion of Mo-bearing low-alloy steel through molybdenum-mediating chemotaxis and motility

Bioelectrochemistry. 2022 Apr:144:108047. doi: 10.1016/j.bioelechem.2021.108047. Epub 2022 Jan 4.

Authors

Zhangwei Guo¹, Zeyun Chai¹, Tao Liu², Shan Gao³, Xinrui Hui¹, Caiyi Zhang³, Na Guo¹, Lihua Dong¹

Affiliations

¹ College of Ocean Science and Engineering, Shanghai Maritime University, Shanghai 201306, China.
² College of Ocean Science and Engineering, Shanghai Maritime University, Shanghai 201306, China. Electronic address: liutao@shmtu.edu.cn.
³ Baoshan Iron & Steel Co., Ltd, Central Research Institute, Shanghai 201900, China.

PMID: 35007894
DOI: 10.1016/j.bioelechem.2021.108047

Abstract

In this work, we found that the microbiologically influenced corrosion of Pseudomonas aeruginosa was mediated by Mo in low-alloy steel. Through immersion experiments, we found that the corrosion rate of low-alloy steel was not decreased with the addition of 1.0 wt% Mo. However, in the presence of P. aeruginosa, the corrosion rate of the 1.0 wt% Mo steel was accelerated, resulting in the development of pits. Confocal laser scanning microscopy images revealed that more biofilm cells adhered on the 1.0 wt% Mo steel surface. The chemotactic behavior and swimming ability of the bacteria were the main reason for the greater biofilm cell adhesion in the presence of Mo. Using an RNA-seq assay, we verified that both chemotaxis and motility together affected the adhesion of biofilm, and their related genes were affected by Mo.

Keywords: Chemotaxis; Corrosion; Mo; Motility; P. aeruginosa; RNA-seq.

MeSH terms

Pseudomonas aeruginosa*