Bacteria have developed different intra- and inter-specific communication mechanisms that involve the production, release, and detection of signaling molecules, because these molecules serve as the autoinducers involved in "quorum sensing" systems. Other communication mechanisms employ volatile signaling molecules that regulate different bacterial processes. The Arthrobacter agilis strain UMCV2 is a plant growth promoting actinobacterium, which induces plant growth and inhibits phytopathogenic fungi by emitting the dimethylhexadecylamine (DMHDA). However, little is known about the effect of this volatile compound on A. agilis UMCV2 itself, as well as on other bacteria. By exposing A. agilis UMCV2 and bacteria of the genus Bacillus and Pseudomonas to different concentrations of DMHDA, this study showed the dose-dependent effects of DMHDA on A. agilis UMCV2 growth, cellular viability, swarming motility, and expression of marker genes of the flagellar apparatus of bacteria. DMHDA was found to also modulate swarming motility of Bacillus sp. ZAP018 and P. fluorescens UM270, but not that of P. aeruginosa PA01. These data indicate that DMHDA is involved in both intra- and inter-specific bacterial interaction.

中文翻译：

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挥发性有机化合物二甲基十六胺影响细菌的生长和细菌的群聚运动。

细菌已经发展出不同的种内和种间通信机制，这些通信机制涉及信号分子的产生、释放和检测，因为这些分子充当参与“群体感应”系统的自诱导剂。其他通信机制采用调节不同细菌过程的挥发性信号分子。敏捷节杆菌菌株 UMCV2 是一种植物生长促进放线菌，它通过释放二甲基十六胺 (DMHDA) 来诱导植物生长并抑制植物病原真菌。然而，人们对这种挥发性化合物对敏捷曲霉 UMCV2 本身以及其他细菌的影响知之甚少。通过将 A. agilis UMCV2 和芽孢杆菌属和假单胞菌属的细菌暴露于不同浓度的 DMHDA，该研究显示了 DMHDA 对敏捷拟杆菌 UMCV2 生长、细胞活力、蜂群运动和细菌鞭毛器标记基因表达的剂量依赖性影响。发现 DMHDA 还可以调节芽孢杆菌的蜂群运动。ZAP018 和 P. fluorescens UM270，但不是 P. aeruginosa PA01。这些数据表明 DMHDA 参与了种内和种间细菌的相互作用。