Quorum‐Sensing Quenching by Volatile Organic Compounds Emitted by Rhizosphere Bacteria

Chernin, Leonid; Toklikishvili, Natela; Ovadis, Marianna; Khmel, I. A.

doi:10.1002/9781118297674.ch75

Cited by 5 publications

(2 citation statements)

References 38 publications

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“…Obviously, VOCs and AHLs can compete in the same bacterium, affecting its ability to induce the QS response. Thus, in bacteria producing both DMDS and AHLs, QS induction will depend on the mutual interactions between these signals (Chernin et al ., ; Müller et al ., ). Despite the high abundance of bacterial VOCs and AHLs in the plant's environment, studies demonstrating actual QQ activities of bacterial VOCs against plant pathogens are lacking, and the question of whether such interactions occur under natural conditions, e.g.…”

Section: Disruption Of Qs By Bacterial Volatilesmentioning

confidence: 98%

Silencing the mob: disrupting quorum sensing as a means to fight plant disease

Helman

Chernin

2014

Molecular Plant Pathology

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120

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Bacteria are able to sense their population's density through a cell-cell communication system, termed 'quorum sensing' (QS). This system regulates gene expression in response to cell density through the constant production and detection of signalling molecules. These molecules commonly act as auto-inducers through the up-regulation of their own synthesis. Many pathogenic bacteria, including those of plants, rely on this communication system for infection of their hosts. The finding that the countering of QS-disrupting mechanisms exists in many prokaryotic and eukaryotic organisms offers a promising novel method to fight disease. During the last decade, several approaches have been proposed to disrupt QS pathways of phytopathogens, and hence to reduce their virulence. Such studies have had varied success in vivo, but most lend promising support to the idea that QS manipulation could be a potentially effective method to reduce bacterial-mediated plant disease. This review discusses the various QS-disrupting mechanisms found in both bacteria and plants, as well as the different approaches applied artificially to interfere with QS pathways and thus protect plant health.

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Section: Disruption Of Qs By Bacterial Volatilesmentioning

confidence: 98%

Silencing the mob: disrupting quorum sensing as a means to fight plant disease

Helman

Chernin

2014

Molecular Plant Pathology

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120

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“…It has been shown using RT PCR that the total pool of volatiles emitted by Pseudomonas chlororaphis 449, P. fluorescens B 4117, and S. plymuthica IC1270 and DMDS alone suppress the gene expression of AHL synthases phzI and csaI in P. chloraphis 449. 1 Undecene, which is the main VOC produced by P. fluorescens B 4117, did not cause this effect [13,14]. Modulation of the QS response (decrease or increase) by VOCs emitted by marine bacteria has been shown in [9] using two AHL biosensors.…”

Section: Introductionmentioning

confidence: 94%

The ability of natural ketones to interact with bacterial quorum sensing systems

Plyuta

Popova

Кокшарова

et al. 2014

Mol. Genet. Microbiol. Virol.

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The effect of natural ketones emitted by bacteria (2 nonanone, 2 heptanone, and 2 undecanone) on the functioning of the Quorum Sensing (QS) systems was studied. In this work, three lux reporter strains containing the components of the LasI/LasR, RhlI/RhlR, and LuxI/LuxR QS systems were used as biosen sors for N acyl homoserine lactones. It was shown that, at concentrations of ketones that exhibited little or no bacterial action, the ketones could modulate the QS response by suppressing the expression of the lux operon to a greater extent than the cell viability of these strains.

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