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Inhibition of Virulence-Related Traits in Pseudomonas syringae pv. actinidiae by Gunpowder Green Tea Extracts

机译：丁香假单胞菌PV中毒力相关性状的抑制。火药绿茶提取物的猕猴桃

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Green tea is a widely-consumed healthy drink produced from the leaves of Camellia sinensis. It is renowned for its antioxidant and anticarcinogenic properties, but also displays significant antimicrobial activity against numerous human pathogens. Here we analyzed the antimicrobial activity of Gunpowder green tea against Pseudomonas syringae pv. actinidiae (Psa), the agent that causes kiwifruit bacterial canker. At the phenotypic level, tea extracts strongly inhibited Psa growth and swimming motility, suggesting it could reduce Psa epiphytic survival during plant colonization. The loss of bacterial virulence-related traits following treatment with tea extracts was also investigated by large-scale transcriptome analysis, which confirmed the in vitro phenotypes and revealed the induction of adaptive responses in the treated bacteria allowing them to cope with iron deficiency and oxidative stress. Such molecular changes may account for the ability of Gunpowder green tea to protect kiwifruit against Psa infection.
机译：绿茶是一种广泛食用的健康茶，由山茶的叶子制成。它以其抗氧化和抗癌特性而闻名，但对多种人类病原体也显示出显着的抗菌活性。在这里，我们分析了火药绿茶对丁香假单胞菌PV的抗菌活性。猕猴桃（Psa），导致猕猴桃细菌性溃疡的病原体。在表型水平上，茶提取物强烈抑制Psa的生长和游泳运动，这表明它可以减少植物定植过程中Psa的附生生存。还通过大规模转录组分析研究了茶提取物处理后细菌毒力相关性状的丧失，该分析证实了体外表型并揭示了在处理过的细菌中诱导了适应性反应，从而使其能够应对铁缺乏和氧化应激。 。这种分子变化可能解释了火药绿茶保护猕猴桃免受Psa感染的能力。

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