Comparative study of the antibacterial effects of wound secretions of different cultivars of Chinese fir

作者：Yu Jiang, Yalin Zeng, Jianing Zhu, Linjun Sun, Pengfei Wu, Ming Li, Xiangqing Ma · 发表于：PeerJ · 年份：2024 · DOI：10.7717/peerj.17850 · 研究领域：Bioactive Natural Diterpenoids Research、Biological Activity of Diterpenoids and Biflavonoids、Bioactive natural compounds

Background The bark of Chinese fir ( Cunninghamia lanceolata ), the largest afforestation tree species in the forest areas of southern China, is susceptible to injuries and bites from small animals. The population of small animals has recently increased owing to improvements in the ecological environment across various forested areas, thus increasing the incidence of injuries in the bark of Chinese fir. Following such injuries, the bark secretes light yellow or milky white secretions, the function of which remains unclear. The present study aimed to reveal the antibacterial effect of exudates of different Chinese fir cultivars on five bacterial species. Methods The research involved three-year-old plantations of Taxus chinensis var . koraiensis and Yangkou3 and three-year-old container plantations of Taxus chinensis var . pendula , Yang 061, and Yang 020. The antibacterial effects of exudates were analyzed using the filter paper diffusion method. The minimum inhibitory concentration for each secretion and the bacterial inhibition zone were determined. Results The exudates of the different Chinese fir bark exhibited notable antibacterial effects on Bacillus subtilis , Salmonella paratyphi B , Pseudomonas aeruginosa , Escherichia coli , and Staphylococcus aureus . However, the extent of these antibacterial effects varied among the different Chinese fir cultivars, as the minimum inhibitory concentrations (MICs) of the exudates against the five bacterial species varied. The mean ...