Quorum sensing (QS) is a form of signal communication that exists widely between organisms. It depends on the population density of bacteria and regulates the behavior of bacteria according to the concentration of signal molecules secreted by bacteria. Bacteria use QS system to carry out intracellular and interspecific signal communication, and participate in various biological functions of bacteria, including the regulation of bioluminescence of marine luminescent bacteria, the production of pathogenic factors of animal and plant pathogenic bacteria, and the symbiosis between rhizobium and plants. Recent studies have shown that the communication between prokaryotes and eukaryotes can also generate and release small molecular compounds, establish a signal pathway for communication and further affect the expression regulation of each other’s genes. This process is called transboundary signal communication. The QS signaling molecules secreted by bacteria can be sensed by the host plant, and the plant can induce a systemic defense response, secrete an analog of the bacterial quorum sensing signal molecule, or produce an enzyme that degrades the signal molecule such as the bacterial N-acyl homoserine lactone, which can influence bacterial quorum sensing, thereby mediating bacterial-plant cross-border signal communication. In this paper, the latest research progress of bacterial QS signal molecular regulation system and its mediated bacteria-plant information communication was reviewed, in order to provide reference for the research of microbial intraspecies, interspecific and inter-plant cross-border signal regulation

群体感应(quorum sensing, QS)是广泛存在于生物之间的一种信号交流方式,依赖于细菌的群体密度,通 过细菌分泌的信号分子浓度而调控细菌行为。 细菌利用 QS 系统进行细胞种内及种间的信号交流,调控多种生物学 功能,包括海洋发光细菌的生物发光、动植物病原细菌致病因子的产生、根瘤菌与植物的共生等。 近年来研究表明,相 互交流的原核和真核生物之间也能够产生并释放小分子化合物,建立相互之间交流的信号通路,进而影响彼此基因的 表达,这个过程即为跨界信号交流。 细菌分泌的 QS 信号分子可以被宿主植物感应,植物感知信号后能够诱导产生系 统性防御反应,分泌细菌群体感应信号分子的类似物,或产生降解细菌 N-酰基高丝氨酸内酯等信号分子的酶来影响 细菌群体感应,从而介导细菌-植物间的跨界信号交流。 本文综述了细菌 QS 信号分子调控系统及其介导的细菌-植 物信息交流的研究进展,旨在对微生物种内、种间及与植物间跨界信号调控研究提供参考。