数字农科院2.0

Inhibitory Effect of Camptothecin against Rice Bacterial Brown Stripe Pathogen Acidovorax avenae subsp avenae RS-2

文献类型： 外文期刊

作者： Dong, Qiaolin;Cai, Li;Hou, Mingsheng;Luo, Ju;Qiu, Wen;Anjum, Syed Ishtiaq;Li, Bin;Xie, Guanlin;Anjum, Syed Ishtiaq;Sun, Guochang

作者机构：

关键词： antibacterial activity;antibacterial mechanism;CPT;Hcp;gene expression

期刊名称： MOLECULES

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年卷期：

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收录情况： SCI

摘要： Camptothecin (CPT) has anticancer, antiviral, and antifungal properties. However, there is a dearth of information about antibacterial activity of CPT. Therefore, in this study, we investigated the inhibitory effect of CPT on Acidovorax avenae subsp. avenae strain RS-2, the pathogen of rice bacterial brown stripe, by measuring cell growth, DNA damage, cell membrane integrity, the expression of secretion systems, and topoisomerase-related genes, as well as the secretion of effector protein Hcp. Results indicated that CPT solutions at 0.05, 0.25, and 0.50 mg/mL inhibited the growth of strain RS-2 in vitro, while the inhibitory efficiency increased with an increase in CPT concentration, pH, and incubation time. Furthermore, CPT treatment affected bacterial growth and replication by causing membrane damage, which was evidenced by transmission electron microscopic observation and live/dead cell staining. In addition, quantitative real-time PCR analysis indicated that CPT treatment caused differential expression of eight secretion system-related genes and one topoisomerase-related gene, while the up-regulated expression of hcp could be justified by the increased secretion of Hcp based on the ELISA test. Overall, this study indicated that CPT has the potential to control the bacterial brown stripe pathogen of rice.

分类号： O62

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