Antibacterial Activity of Chitosan/Thyme Essential Oil/Copper Nano-Complexes against Pseudomonas syringae pv. syringae

Articles in Press

Document Type : Short communication-ٍEnglish

Authors

1 Cell and molecular biology department, Kosar University of Bojnord, Bojnord, Iran

2 Northern Khorasan agricultural and natural resources research center, Bojnord, Iran

10.22055/ppr.2025.48722.1786

Abstract

Pseudomonas syringae pv. syringae (Pss) is the causal agent of bacterial canker disease in stone, pome and kiwi fruit trees, which causes much damage to these hosts. Using biodegradable nanoparticle complexes is a new approach against bacterial cankers. This research investigated the antibacterial activity of chitosan nanoparticles (CNPs)/Copper/thyme essential oil (EO) nano-complexes against this bacterium. In this regard, the physicochemical characteristics of chitosan nanoparticles and nano-complexes were analyzed by dynamic light scattering (DLS) and Fourier-transform infrared spectroscopy (FTIR) methods. The DLS results showed that the nanoparticles had unimodal size distribution with an average particle size of 190 to 254 nm. The FTIR analysis confirmed the interaction among the components of nano-complexes. To evaluate the antibacterial activity of the nano-complexes, the minimum inhibitory concentration (MIC) was measured against Pss. The results showed that the nano-complexes had relatively high antibacterial activity against Pss compared to their components. In particular, the nano-complexes showed the lower MIC value and, therefore, higher antibacterial activity compared to thyme EO, Copper, and CNPs alone. These results suggest a synergistic interaction among the components, indicating that the nano-complexes could be a promising eco-friendly option for controlling bacterial canker disease caused by Pss. Further research is needed to study the effectiveness of these compounds in the field and to investigate the long-term environmental effects.

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Main Subjects

Plant Protection (Scientific Journal of Agriculture)

Articles in Press, Accepted Manuscript
Available Online from 03 May 2025

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