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首页> 外文期刊>Acta Biochimica Polonica >Antibacterial activity of caffeine against plant pathogenic bacteria
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Antibacterial activity of caffeine against plant pathogenic bacteria

机译：咖啡因对植物病原菌的抗菌活性

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The objective of the present study was to evaluate the antibacterial properties of a plant secondary metabolite - caffeine. Caffeine is present in over 100 plant species. Antibacterial activity of caffeine was examined against the following plant-pathogenic bacteria: Ralstonia solanacearum (Rsol), Clavibacter michiganesis subsp. sepedonicus (Cms), Dickeya solani (Dsol), Pectobacterium atrosepticum (Pba), Pectobacterium carotovorum subsp. carotovorum (Pcc), Pseudomonas syringae pv. tomato (Pst), and Xanthomonas campestris subsp. campestris (Xcc). MIC and MBC values ranged from 5 to 20 mM and from 43 to 100 mM, respectively. Caffeine increased the bacterial generation time of all tested species and caused changes in cell morphology. The influence of caffeine on the synthesis of DNA, RNA and proteins was investigated in cultures of plant pathogenic bacteria with labelled precursors: [H-3] thymidine, [H-3] uridine or C-14 leucine, respectively. RNA biosynthesis was more affected than DNA or protein biosynthesis in bacterial cells treated with caffeine. Treatment of Pba with caffeine for 336 h did not induce resistance to this compound. Caffeine application reduced disease symptoms caused by Dsol on chicory leaves, potato slices, and whole potato tubers. The data presented indicate caffeine as a potential tool for the control of diseases caused by plant-pathogenic bacteria, especially under storage conditions.
机译：本研究的目的是评估植物次生代谢产物咖啡因的抗菌特性。咖啡因存在于100多种植物中。检查了咖啡因对下列植物致病细菌的抗菌活性：青枯雷尔氏菌（Rsol），密闭性克氏杆菌亚种。 sepedonicus（Cms），Dickeya solani（Dsol），atrosepticum（Pba）菌，carotovorum菌亚种。胡萝卜假单胞菌（Pseudomonas syringae）pv。番茄（Pst）和Xanthomonas campestris亚种。 campestris（Xcc）。 MIC和MBC值分别为5至20 mM和43至100 mM。咖啡因增加了所有被测物种的细菌生成时间，并导致了细胞形态的变化。在带有标记前体：[H-3]胸苷，[H-3]尿苷或C-14亮氨酸的植物病原细菌培养物中，研究了咖啡因对DNA，RNA和蛋白质合成的影响。咖啡因处理后的细菌细胞中，RNA生物合成比DNA或蛋白质生物合成受到的影响更大。用咖啡因处理Pba 336小时没有诱导对该化合物的抗药性。咖啡因的施用减少了菊苣叶，马铃薯切片和整个马铃薯块茎上Dsol引起的疾病症状。呈现的数据表明，咖啡因是控制植物致病细菌引起的疾病的潜在工具，尤其是在储存条件下。

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