Antibacterial effect of Cu2O/TiO2 visible-light photocatalytic composite on Xanthomonas campestris.

Autor:	Jiang Y; College of Life Sciences, Shanghai Normal University, Shanghai 200234, China., Zhou S; Shanghai General Hospital, Shanghai 200080, China., Chen L; College of Life Sciences, Shanghai Normal University, Shanghai 200234, China., Huo Y; College of Chemistry and Materials Science, Shanghai Normal University, Shanghai 200234, China., Huang G; College of Chemistry and Chemical Engineering, Anhui University of Technology, Ma'anshan 243002, China., Cao J; College of Life Sciences, Shanghai Normal University, Shanghai 200234, China., Dai X; College of Life Sciences, Shanghai Normal University, Shanghai 200234, China.
Jazyk:	angličtina
Zdroj:	Letters in applied microbiology [Lett Appl Microbiol] 2024 Oct 01; Vol. 77 (10).
DOI:	10.1093/lambio/ovae087
Abstrakt:	In this study, a Cu2O/TiO2 (CuTi) visible-light photocatalytic composite was employed for the treatment of Xanthomonas campestris and X. campestris-infected Brassica napus seedlings. The minimum inhibitory concentration (MIC) and minimum bactericidal concentration (MBC) values against X. campestris were determined to be 8 and 32 μg ml-1, respectively. Transmission electron microscopy analysis demonstrated a direct correlation between the extent of bacterial cell damage and the concentration of CuTi. Noteworthily, a bactericidal rate of 100% was achieved at a concentration of 150 μg ml-1 over a treatment duration of 120 min. Moreover, alterations in active oxidants and antioxidants, including reactive oxygen species, glutathione reductase, superoxide dismutase, peroxidase, and catalase within the bacterial cells, were examined to elucidate the underlying mechanism of inhibition by the CuTi. The B. napus infected by X. campestris was treated with CuTi, and the efficacy was validated through determination of plant resistance indexes. The combined data confirmed that the CuTi is characterized by a low dose, fast onset, good effect, and higher safety for killing X. campestris, and it is expected to be developed as an antimicrobial agent for vegetables. (© The Author(s) 2024. Published by Oxford University Press on behalf of Applied Microbiology International.)
Databáze:	MEDLINE
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