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Xu B, Su Q, Yang Y, Huang S, Yang Y, Shi X, Choo KH, Ng HY, Lee CH. Quorum Quenching in Membrane Bioreactors for Fouling Retardation: Complexity Provides Opportunities. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2024. [PMID: 39012227 DOI: 10.1021/acs.est.4c04535] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 07/17/2024]
Abstract
The occurrence of biofouling restricts the widespread application of membrane bioreactors (MBRs) in wastewater treatment. Regulation of quorum sensing (QS) is a promising approach to control biofouling in MBRs, yet the underlying mechanisms are complex and remain to be illustrated. A fundamental understanding of the relationship between QS and membrane biofouling in MBRs is lacking, which hampers the development and application of quorum quenching (QQ) techniques in MBRs (QQMBRs). While many QQ microorganisms have been isolated thus far, critical criteria for selecting desirable QQ microorganisms are still missing. Furthermore, there are inconsistent results regarding the QQ lifecycle and the effects of QQ on the physicochemical characteristics and microbial communities of the mixed liquor and biofouling assemblages in QQMBRs, which might result in unreliable and inefficient QQ applications. This review aims to comprehensively summarize timely QQ research and highlight the important yet often ignored perspectives of QQ for biofouling control in MBRs. We consider what this "information" can and cannot tell us and explore its values in addressing specific and important questions in QQMBRs. Herein, we first examine current analytical methods of QS signals and discuss the critical roles of QS in fouling-forming microorganisms in MBRs, which are the cornerstones for the development of QQ technologies. To achieve targeting QQ strategies in MBRs, we propose the substrate specificity and degradation capability of isolated QQ microorganisms and the surface area and pore structures of QQ media as the critical criteria to select desirable functional microbes and media, respectively. To validate the biofouling retardation efficiency, we further specify the QQ effects on the physicochemical properties, microbial community composition, and succession of mixed liquor and biofouling assemblages in MBRs. Finally, we provide scale-up considerations of QQMBRs in terms of the debated QQ lifecycle, practical synergistic strategies, and the potential cost savings of MBRs. This review presents the limitations of classic QS/QQ hypotheses in MBRs, advances the understanding of the role of QS/QQ in biofouling development/retardation in MBRs, and builds a bridge between the fundamental understandings and practical applications of QQ technology.
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Affiliation(s)
- Boyan Xu
- Center for Water Research, Advanced Institute of Natural Sciences, Beijing Normal University, Zhuhai, 519087, China
- Department of Civil and Environmental Engineering, National University of Singapore, 117576, Singapore
| | - Qingxian Su
- Center for Water Research, Advanced Institute of Natural Sciences, Beijing Normal University, Zhuhai, 519087, China
- Department of Civil and Environmental Engineering, National University of Singapore, 117576, Singapore
- Department of Environmental Engineering, Technical University of Denmark, Lyngby 2800, Denmark
| | - Yuxin Yang
- Center for Water Research, Advanced Institute of Natural Sciences, Beijing Normal University, Zhuhai, 519087, China
| | - Shujuan Huang
- School of Environmental and Municipal Engineering, Qingdao University of Technology, 11 Fushun Road, Qingdao, 266033, PR China
| | - Yue Yang
- Corporate Sustainability Office, TÜV SÜD, Westendstr. 199, 80686 München, Germany
| | - Xueqing Shi
- School of Environmental and Municipal Engineering, Qingdao University of Technology, 11 Fushun Road, Qingdao, 266033, PR China
| | - Kwang-Ho Choo
- Department of Environmental Engineering, Kyungpook National University, 80 Daehak-ro, Buk-gu, Daegu 702-701, Republic of Korea
| | - How Yong Ng
- Center for Water Research, Advanced Institute of Natural Sciences, Beijing Normal University, Zhuhai, 519087, China
- Department of Civil and Environmental Engineering, National University of Singapore, 117576, Singapore
| | - Chung-Hak Lee
- School of Chemical and Biological Engineering, Seoul National University, Seoul, 08826, Republic of Korea
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Dukare A, Mhatre P, Maheshwari HS, Bagul S, Manjunatha BS, Khade Y, Kamble U. Delineation of mechanistic approaches of rhizosphere microorganisms facilitated plant health and resilience under challenging conditions. 3 Biotech 2022; 12:57. [PMID: 35186654 PMCID: PMC8817020 DOI: 10.1007/s13205-022-03115-4] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2021] [Accepted: 01/12/2022] [Indexed: 12/27/2022] Open
Abstract
Sustainable agriculture demands the balanced use of inorganic, organic, and microbial biofertilizers for enhanced plant productivity and soil fertility. Plant growth-enhancing rhizospheric bacteria can be an excellent biotechnological tool to augment plant productivity in different agricultural setups. We present an overview of microbial mechanisms which directly or indirectly contribute to plant growth, health, and development under highly variable environmental conditions. The rhizosphere microbiomes promote plant growth, suppress pathogens and nematodes, prime plants immunity, and alleviate abiotic stress. The prospective of beneficial rhizobacteria to facilitate plant growth is of primary importance, particularly under abiotic and biotic stresses. Such microbe can promote plant health, tolerate stress, even remediate soil pollutants, and suppress phytopathogens. Providing extra facts and a superior understanding of microbial traits underlying plant growth promotion can stir the development of microbial-based innovative solutions for the betterment of agriculture. Furthermore, the application of novel scientific approaches for facilitating the design of crop-specific microbial biofertilizers is discussed. In this context, we have highlighted the exercise of "multi-omics" methods for assessing the microbiome's impact on plant growth, health, and overall fitness via analyzing biochemical, physiological, and molecular facets. Furthermore, the role of clustered regularly interspaced short palindromic repeats (CRISPR) based genome alteration and nanotechnology for improving the agronomic performance and rhizosphere microbiome is also briefed. In a nutshell, the paper summarizes the recent vital molecular processes that underlie the different beneficial plant-microbe interactions imperative for enhancing plant fitness and resilience under-challenged agriculture.
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Affiliation(s)
- Ajinath Dukare
- ICAR-Central Institute for Research on Cotton Technology (CIRCOT), Mumbai, Maharashtra India
| | - Priyank Mhatre
- ICAR-Central Potato Research Institute (Regional Station), Udhagamandalam, Tamil Nadu India
| | - Hemant S. Maheshwari
- ICAR-Indian Institute of Soybean Research (IISR), Indore, Madhya Pradesh India
- Present Address: Ecophysiology of Plants, Faculty of Science and Engineering, GELIFES-Groningen Institute for Evolutionary Life Sciences, The University of Groningen, Nijenborgh 7, 9747 AG Groningen, The Netherlands
| | - Samadhan Bagul
- ICAR-Directorate of Medicinal and Aromatic Plant Research, Anand, Gujarat India
| | - B. S. Manjunatha
- ICAR-National Institute of Natural Fibre Engineering and Technology, Kolkata, West Bengal India
| | - Yogesh Khade
- ICAR- Directorate of Onion and Garlic Research, Pune, Maharashtra India
| | - Umesh Kamble
- ICAR-Indian Institute of Wheat and Barley Research, Karnal, Haryana India
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Quorum-Sensing Inhibition by Gram-Positive Bacteria. Microorganisms 2022; 10:microorganisms10020350. [PMID: 35208805 PMCID: PMC8875677 DOI: 10.3390/microorganisms10020350] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2021] [Revised: 01/27/2022] [Accepted: 01/28/2022] [Indexed: 12/01/2022] Open
Abstract
The modern paradigm assumes that interspecies communication of microorganisms occurs through precise regulatory mechanisms. In particular, antagonism between bacteria or bacteria and fungi can be achieved by direct destruction of the targeted cells through the regulated production of antimicrobial metabolites or by controlling their adaptive mechanisms, such as the formation of biofilms. The quorum-quenching phenomenon provides such a countermeasure strategy. This review discusses quorum-sensing suppression by Gram-positive microorganisms, the underlying mechanisms of this process, and its molecular intermediates. The main focus will be on Gram-positive bacteria that have practical applications, such as starter cultures for food fermentation, probiotics, and other microorganisms of biotechnological importance. The possible evolutionary role of quorum-quenching mechanisms during the development of interspecies interactions of bacteria is also considered. In addition, the review provides possible practical applications for these mechanisms, such as the control of pathogens, improving the efficiency of probiotics, and plant protection.
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Yu H, Du C, Qu F, He J, Rong H. Efficient biostimulants for bacterial quorum quenching to control fouling in MBR. CHEMOSPHERE 2022; 286:131689. [PMID: 34352546 DOI: 10.1016/j.chemosphere.2021.131689] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/12/2021] [Revised: 07/12/2021] [Accepted: 07/25/2021] [Indexed: 06/13/2023]
Abstract
Quorum quenching (QQ), which disrupts bacterial communication and biofilm formation, could alleviate biofouling in MBR. QQ bio-stimulus possessing similar conserved moiety as the signal molecule could promote indigenous QQ bacteria, and thus successfully alleviate biofouling in MBR. However, efficient biostimulant has been barely explored for QQ enhancement in activated sludge system. This study extensively enumerated the potential QQ bio-stimuli, and examined their efficacy on QQ promotion for activated sludge. Moreover, the effect of the QQ consortia on fouling mitigation was also investigated. The results indicated that gamma-caprolactone (GCL), d-xylonic acid-1,4-lactone (XAL), gamma-heptalactone (GHL), urea, and acetamide proved effective in promoting AHLs inactivating activity of activated sludge. GCL, XAL, and GHL intensified the lactonase activity, while urea and acetamide augmented acylase activity. While coupled with beads entrapment, GCL consortia beads, XAL consortia beads, and urea consortia beads effectively disrupted quorum sensing (QS) and controlled membrane fouling in MBR. This work found out several optional bio-stimuli valid for tuning QQ in activated sludge system, and provided easily available and economical alternatives for QQ biostimulation, meanwhile the proposed QQ-MBR approach through QQ biostimulation and consortia entrapment also proved effective and practical.
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Affiliation(s)
- Huaorng Yu
- Key Laboratory for Water Quality and Conservation of the Pearl River Delta, Guangzhou University, Guangzhou, 510006, China; School of Civil Engineering, Guangzhou University, Guangzhou, 510006, China
| | - Chenyu Du
- Key Laboratory for Water Quality and Conservation of the Pearl River Delta, Guangzhou University, Guangzhou, 510006, China; School of Civil Engineering, Guangzhou University, Guangzhou, 510006, China
| | - Fangshu Qu
- Key Laboratory for Water Quality and Conservation of the Pearl River Delta, Guangzhou University, Guangzhou, 510006, China; School of Civil Engineering, Guangzhou University, Guangzhou, 510006, China.
| | - Junguo He
- Key Laboratory for Water Quality and Conservation of the Pearl River Delta, Guangzhou University, Guangzhou, 510006, China; School of Civil Engineering, Guangzhou University, Guangzhou, 510006, China
| | - Hongwei Rong
- Key Laboratory for Water Quality and Conservation of the Pearl River Delta, Guangzhou University, Guangzhou, 510006, China; School of Civil Engineering, Guangzhou University, Guangzhou, 510006, China.
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Kuhl T, Chowdhury SP, Uhl J, Rothballer M. Genome-Based Characterization of Plant-Associated Rhodococcus qingshengii RL1 Reveals Stress Tolerance and Plant-Microbe Interaction Traits. Front Microbiol 2021; 12:708605. [PMID: 34489897 PMCID: PMC8416521 DOI: 10.3389/fmicb.2021.708605] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2021] [Accepted: 07/26/2021] [Indexed: 11/24/2022] Open
Abstract
Stress tolerant, plant-associated bacteria can play an important role in maintaining a functional plant microbiome and protecting plants against various (a)biotic stresses. Members of the stress tolerant genus Rhodococcus are frequently found in the plant microbiome. Rhodococcus qingshengii RL1 was isolated from Eruca sativa and the complete genome was sequenced, annotated and analyzed using different bioinformatic tools. A special focus was laid on functional analyses of stress tolerance and interactions with plants. The genome annotation of RL1 indicated that it contains a repertoire of genes which could enable it to survive under different abiotic stress conditions for e.g., elevated mercury concentrations, to interact with plants via root colonization, to produce phytohormones and siderophores, to fix nitrogen and to interact with bacterial signaling via a LuxR-solo and quorum quenching. Based on the identified genes, functional analyses were performed in vitro with RL1 under different growth conditions. The R. qingshengii type strain djl6 and a closely related Rhodococcus erythropolis BG43 were included in the experiments to find common and distinct traits between the strains. Genome based phylogenetic analysis of 15 available and complete R. erythropolis and R. qingshengii genome sequences revealed a separation of the R. erythropolis clade in two subgroups. First one harbors only R. erythropolis strains including the R. erythropolis type strain. The second group consisted of the R. qingshengii type strain and a mix of R. qingshengii and R. erythropolis strains indicating that some strains of the second group should be considered for taxonomic re-assignment. However, BG43 was clearly identified as R. erythropolis and RL1 clearly as R. qingshengii and the strains had most tested traits in common, indicating a close functional overlap of traits between the two species.
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Affiliation(s)
- Theresa Kuhl
- Institute for Network Biology, Helmholtz Zentrum München – German Research Center for Environmental Health (GmbH), Neuherberg, Germany
| | - Soumitra Paul Chowdhury
- Institute for Network Biology, Helmholtz Zentrum München – German Research Center for Environmental Health (GmbH), Neuherberg, Germany
| | - Jenny Uhl
- Research Unit Analytical Biogeochemistry, Helmholtz Zentrum München – German Research Center for Environmental Health (GmbH), Neuherberg, Germany
| | - Michael Rothballer
- Institute for Network Biology, Helmholtz Zentrum München – German Research Center for Environmental Health (GmbH), Neuherberg, Germany
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Bourigault Y, Rodrigues S, Crépin A, Chane A, Taupin L, Bouteiller M, Dupont C, Merieau A, Konto-Ghiorghi Y, Boukerb AM, Turner M, Hamon C, Dufour A, Barbey C, Latour X. Biocontrol of Biofilm Formation: Jamming of Sessile-Associated Rhizobial Communication by Rhodococcal Quorum-Quenching. Int J Mol Sci 2021; 22:ijms22158241. [PMID: 34361010 PMCID: PMC8347015 DOI: 10.3390/ijms22158241] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2021] [Revised: 07/02/2021] [Accepted: 07/07/2021] [Indexed: 11/16/2022] Open
Abstract
Biofilms are complex structures formed by a community of microbes adhering to a surface and/or to each other through the secretion of an adhesive and protective matrix. The establishment of these structures requires a coordination of action between microorganisms through powerful communication systems such as quorum-sensing. Therefore, auxiliary bacteria capable of interfering with these means of communication could be used to prevent biofilm formation and development. The phytopathogen Rhizobium rhizogenes, which causes hairy root disease and forms large biofilms in hydroponic crops, and the biocontrol agent Rhodococcus erythropolis R138 were used for this study. Changes in biofilm biovolume and structure, as well as interactions between rhizobia and rhodococci, were monitored by confocal laser scanning microscopy with appropriate fluorescent biosensors. We obtained direct visual evidence of an exchange of signals between rhizobia and the jamming of this communication by Rhodococcus within the biofilm. Signaling molecules were characterized as long chain (C14) N-acyl-homoserine lactones. The role of the Qsd quorum-quenching pathway in biofilm alteration was confirmed with an R. erythropolis mutant unable to produce the QsdA lactonase, and by expression of the qsdA gene in a heterologous host, Escherichia coli. Finally, Rhizobium biofilm formation was similarly inhibited by a purified extract of QsdA enzyme.
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Affiliation(s)
- Yvann Bourigault
- Laboratory of Microbiology Signals and Microenvironment (LMSM EA 4312), University of Rouen Normandy, F-27000 Evreux, France; (Y.B.); (A.C.); (M.B.); (C.D.); (A.M.); (Y.K.-G.); (A.M.B.); (C.B.)
- Research Federations NORVEGE Fed4277 & NORSEVE, Normandy University, F-76821 Mont-Saint-Aignan, France
| | - Sophie Rodrigues
- Laboratoire de Biotechnologie et Chimie Marines, LBCM IUEM, EA 3884, Université de Bretagne-Sud, F-56100 Lorient, France; (S.R.); (L.T.); (A.D.)
| | - Alexandre Crépin
- Laboratoire Ecologie et Biologie des Interactions, UMR CNRS 7267, F-86073 Poitiers, France;
| | - Andrea Chane
- Laboratory of Microbiology Signals and Microenvironment (LMSM EA 4312), University of Rouen Normandy, F-27000 Evreux, France; (Y.B.); (A.C.); (M.B.); (C.D.); (A.M.); (Y.K.-G.); (A.M.B.); (C.B.)
| | - Laure Taupin
- Laboratoire de Biotechnologie et Chimie Marines, LBCM IUEM, EA 3884, Université de Bretagne-Sud, F-56100 Lorient, France; (S.R.); (L.T.); (A.D.)
| | - Mathilde Bouteiller
- Laboratory of Microbiology Signals and Microenvironment (LMSM EA 4312), University of Rouen Normandy, F-27000 Evreux, France; (Y.B.); (A.C.); (M.B.); (C.D.); (A.M.); (Y.K.-G.); (A.M.B.); (C.B.)
- Research Federations NORVEGE Fed4277 & NORSEVE, Normandy University, F-76821 Mont-Saint-Aignan, France
| | - Charly Dupont
- Laboratory of Microbiology Signals and Microenvironment (LMSM EA 4312), University of Rouen Normandy, F-27000 Evreux, France; (Y.B.); (A.C.); (M.B.); (C.D.); (A.M.); (Y.K.-G.); (A.M.B.); (C.B.)
- Research Federations NORVEGE Fed4277 & NORSEVE, Normandy University, F-76821 Mont-Saint-Aignan, France
| | - Annabelle Merieau
- Laboratory of Microbiology Signals and Microenvironment (LMSM EA 4312), University of Rouen Normandy, F-27000 Evreux, France; (Y.B.); (A.C.); (M.B.); (C.D.); (A.M.); (Y.K.-G.); (A.M.B.); (C.B.)
- Research Federations NORVEGE Fed4277 & NORSEVE, Normandy University, F-76821 Mont-Saint-Aignan, France
| | - Yoan Konto-Ghiorghi
- Laboratory of Microbiology Signals and Microenvironment (LMSM EA 4312), University of Rouen Normandy, F-27000 Evreux, France; (Y.B.); (A.C.); (M.B.); (C.D.); (A.M.); (Y.K.-G.); (A.M.B.); (C.B.)
- Research Federations NORVEGE Fed4277 & NORSEVE, Normandy University, F-76821 Mont-Saint-Aignan, France
| | - Amine M. Boukerb
- Laboratory of Microbiology Signals and Microenvironment (LMSM EA 4312), University of Rouen Normandy, F-27000 Evreux, France; (Y.B.); (A.C.); (M.B.); (C.D.); (A.M.); (Y.K.-G.); (A.M.B.); (C.B.)
| | - Marie Turner
- Vegenov, F-29250 Saint-Pol-de-Léon, France; (M.T.); (C.H.)
- Biocontrol Consortium, F-75007 Paris, France
| | - Céline Hamon
- Vegenov, F-29250 Saint-Pol-de-Léon, France; (M.T.); (C.H.)
| | - Alain Dufour
- Laboratoire de Biotechnologie et Chimie Marines, LBCM IUEM, EA 3884, Université de Bretagne-Sud, F-56100 Lorient, France; (S.R.); (L.T.); (A.D.)
| | - Corinne Barbey
- Laboratory of Microbiology Signals and Microenvironment (LMSM EA 4312), University of Rouen Normandy, F-27000 Evreux, France; (Y.B.); (A.C.); (M.B.); (C.D.); (A.M.); (Y.K.-G.); (A.M.B.); (C.B.)
- Research Federations NORVEGE Fed4277 & NORSEVE, Normandy University, F-76821 Mont-Saint-Aignan, France
| | - Xavier Latour
- Laboratory of Microbiology Signals and Microenvironment (LMSM EA 4312), University of Rouen Normandy, F-27000 Evreux, France; (Y.B.); (A.C.); (M.B.); (C.D.); (A.M.); (Y.K.-G.); (A.M.B.); (C.B.)
- Research Federations NORVEGE Fed4277 & NORSEVE, Normandy University, F-76821 Mont-Saint-Aignan, France
- Biocontrol Consortium, F-75007 Paris, France
- Correspondence: ; +33-235-146-000
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Shi W, Su G, Li M, Wang B, Lin R, Yang Y, Wei T, Zhou B, Gao Z. Distribution of Bacterial Endophytes in the Non-lesion Tissues of Potato and Their Response to Potato Common Scab. Front Microbiol 2021; 12:616013. [PMID: 33633704 PMCID: PMC7900429 DOI: 10.3389/fmicb.2021.616013] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2020] [Accepted: 01/13/2021] [Indexed: 11/24/2022] Open
Abstract
The response of plant endophytes to disease within infected tissues has been well demonstrated, but the corresponding response of endophytes in non-lesion tissues remains unclear. Here, we studied the composition and distribution of bacterial endophytes in potato roots (RE), stems (SE), and tubers (TE), and explored the response of endophytes in non-lesion tissues to potato common scab (PCS), which is a soil-borne disease caused by pathogenic Streptomyces and results in serious losses to the global economy every year. Via high-throughput sequencing, it was seen that the composition of endophytes in roots, stems, and tubers had significant differences (P < 0.05) and the distribution of the bacterial communities illustrated a gradient from soil to root to tuber/stem. PCS significantly reduced bacterial endophytes α-diversity indexes, including ACE and the number of observed operational taxonomic units (OTUs), of RE without significantly reducing the indexes of SE and TE. No significant effect on the composition of endophytes were caused by PCS in roots, tubers, or stems between high PCS severity (H) and low PCS severity (L) infections at the community level, but PCS did have a substantial impact on the relative abundance of several specific endophytes. Rhizobium and Sphingopyxis were significantly enriched in root endophytes with low PCS severity (REL); Delftia and Ochrobactrum were significantly enriched in stem endophytes with low PCS severity (SEL); Pedobacter, Delftia, and Asticcacaulis were significantly enriched in tuber endophytes with high PCS severity (TEH). OTU62, a potential PCS pathogen in this study, was capable of colonizing potato tubers, roots, and stems with few or no symptoms present. Co-occurrence networks showed that the number of correlations to OTU62 was higher than average in these three tissue types, suggesting the importance of OTU62 in endophytic communities. This study clarified the distribution and composition of potato endophytes in tubers, roots, and stems, and demonstrated the response of endophytes in non-lesion tissues to PCS.
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Affiliation(s)
- Wencong Shi
- State Key Laboratory of Crop Biology, Shandong Agricultural University, Tai'an, China.,College of Life Sciences, Shandong Agricultural University, Tai'an, China
| | - Gaoya Su
- State Key Laboratory of Crop Biology, Shandong Agricultural University, Tai'an, China.,College of Life Sciences, Shandong Agricultural University, Tai'an, China
| | - Mingcong Li
- State Key Laboratory of Crop Biology, Shandong Agricultural University, Tai'an, China.,College of Life Sciences, Shandong Agricultural University, Tai'an, China
| | - Bing Wang
- College of Life Sciences, Shandong Agricultural University, Tai'an, China.,National Engineering Laboratory for Efficient Utilization of Soil and Fertilizer Resources, Tai'an, China
| | - Rongshan Lin
- College of Life Sciences, Shandong Agricultural University, Tai'an, China.,National Engineering Laboratory for Efficient Utilization of Soil and Fertilizer Resources, Tai'an, China
| | - Yutian Yang
- Agriculture Research Institute of Zaozhuang, Zaozhuang, China
| | - Tao Wei
- Agriculture Research Institute of Zaozhuang, Zaozhuang, China
| | - Bo Zhou
- College of Life Sciences, Shandong Agricultural University, Tai'an, China.,National Engineering Laboratory for Efficient Utilization of Soil and Fertilizer Resources, Tai'an, China
| | - Zheng Gao
- State Key Laboratory of Crop Biology, Shandong Agricultural University, Tai'an, China.,College of Life Sciences, Shandong Agricultural University, Tai'an, China
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Zhu C, Mahmood Z, Zhang W, Akram MW, Ainur D, Ma H. In situ investigation of acute exposure of graphene oxide on activated sludge: Biofilm characteristics, microbial activity and cytotoxicity. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2020; 199:110639. [PMID: 32408033 DOI: 10.1016/j.ecoenv.2020.110639] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/10/2020] [Revised: 03/26/2020] [Accepted: 04/10/2020] [Indexed: 06/11/2023]
Abstract
Graphene Oxide (GO) has wide applications in many fields which has caused a large expected quantity of the graphene-based wastes. It is necessary to understand the toxic effects of the GO on the activated sludge (AS) considering its inevitable discharge to the wastewater treatment plants as the ultimate repositories for these wastes. In this study, the acute exposures of the multilayer Nano-graphene oxide (MNGO) at different dosages were conducted in order to investigate its integrated effects on the formation of the biofilm, mature biofilm and the microbial activity of the activated sludge. Raman spectroscopy and laser scanning confocal microscopy (LSCM) were adopted for the in-situ characterization of the biofilm with the exposure of the MNGO. The results showed that the activated sludge was tolerable to the acute exposure of the less than 100 mg/L of the MNGO, especially for the mature biofilm, and only a subtle decrease was found in the size and thickness during the formation of the biofilm, while the amount of 300 mg/L of the MNGO caused the sever deterioration on the activated sludge system. The microbial metabolic activity, viability, and the biological removal of the nutrients were significantly affected with the more than 100 mg/L of the MNGO. It was also demonstrated by the microbial cytotoxicity tests that the increase in the exposure of the MNGO was related to the increase in the reactive oxygen species (ROS) and the damaging degree of the cell membrane.
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Affiliation(s)
- Chao Zhu
- School of Environmental Science & Engineering. Shaanxi University of Science and Technology, Xi'an, China.
| | - Zarak Mahmood
- School of Environmental Science & Engineering. Shaanxi University of Science and Technology, Xi'an, China
| | - Wenting Zhang
- School of Environmental Science & Engineering. Shaanxi University of Science and Technology, Xi'an, China
| | - M Waqar Akram
- Department of Precision Machinery and Instrumentation. University of Science and Technology of China, Hefei, China
| | - Dyussenova Ainur
- School of Environmental Science & Engineering. Shaanxi University of Science and Technology, Xi'an, China
| | - Hongrui Ma
- School of Environmental Science & Engineering. Shaanxi University of Science and Technology, Xi'an, China
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Chane A, Bourigault Y, Bouteiller M, Konto-Ghiorghi Y, Merieau A, Barbey C, Latour X. Close-up on a bacterial informational war in the geocaulosphere. Can J Microbiol 2020; 66:447-454. [DOI: 10.1139/cjm-2019-0546] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
The geocaulosphere is home to microbes that establish communication between themselves and others that disrupt them. These cell-to-cell communication systems are based on the synthesis and perception of signaling molecules, of which the best known belong to the N-acyl-homoserine lactone (AHL) family. Among indigenous bacteria, certain Gram-positive actinobacteria can sense AHLs produced by soft-rot Gram-negative phytopathogens and can degrade the quorum-sensing AHL signals to impair the expression of virulence factors. We mimicked this interaction by introducing dual-color reporter strains suitable for monitoring both the location of the cells and their quorum-sensing and -quenching activities, in potato tubers. The exchange of AHL signals within the pathogen’s cell quorum was clearly detected by the presence of bright green fluorescence instead of blue in a portion of Pectobacterium-tagged cells. This phenomenon in Rhodococcus cells was accompanied by a change from red fluorescence to orange, showing that the disappearance of signaling molecules is due to rhodococcal AHL degradation rather than the inhibition of AHL production. Rhodococci are victorious in this fight for the control of AHL-based communication, as their jamming activity is powerful enough to prevent the onset of disease symptoms.
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Affiliation(s)
- Andrea Chane
- Laboratoire de Microbiologie Signaux et Microenvironnement (LMSM EA 4312) - Normandie Université - LMSM, 55 rue Saint-Germain, 27000 Evreux, France & Structure Fédérative de Recherche Normandie Végétale 4277 (NORVEGE)
| | - Yvann Bourigault
- Laboratoire de Microbiologie Signaux et Microenvironnement (LMSM EA 4312) - Normandie Université - LMSM, 55 rue Saint-Germain, 27000 Evreux, France & Structure Fédérative de Recherche Normandie Végétale 4277 (NORVEGE)
| | - Mathilde Bouteiller
- Laboratoire de Microbiologie Signaux et Microenvironnement (LMSM EA 4312) - Normandie Université - LMSM, 55 rue Saint-Germain, 27000 Evreux, France & Structure Fédérative de Recherche Normandie Végétale 4277 (NORVEGE)
- Laboratoire de Microbiologie Signaux et Microenvironnement (LMSM EA 4312) - Normandie Université - LMSM, 55 rue Saint-Germain, 27000 Evreux, France & Structure Fédérative de Recherche Normandie Végétale 4277 (NORVEGE)
| | - Yoan Konto-Ghiorghi
- Laboratoire de Microbiologie Signaux et Microenvironnement (LMSM EA 4312) - Normandie Université - LMSM, 55 rue Saint-Germain, 27000 Evreux, France & Structure Fédérative de Recherche Normandie Végétale 4277 (NORVEGE)
- Laboratoire de Microbiologie Signaux et Microenvironnement (LMSM EA 4312) - Normandie Université - LMSM, 55 rue Saint-Germain, 27000 Evreux, France & Structure Fédérative de Recherche Normandie Végétale 4277 (NORVEGE)
| | - Annabelle Merieau
- Laboratoire de Microbiologie Signaux et Microenvironnement (LMSM EA 4312) - Normandie Université - LMSM, 55 rue Saint-Germain, 27000 Evreux, France & Structure Fédérative de Recherche Normandie Végétale 4277 (NORVEGE)
- Laboratoire de Microbiologie Signaux et Microenvironnement (LMSM EA 4312) - Normandie Université - LMSM, 55 rue Saint-Germain, 27000 Evreux, France & Structure Fédérative de Recherche Normandie Végétale 4277 (NORVEGE)
| | - Corinne Barbey
- Laboratoire de Microbiologie Signaux et Microenvironnement (LMSM EA 4312) - Normandie Université - LMSM, 55 rue Saint-Germain, 27000 Evreux, France & Structure Fédérative de Recherche Normandie Végétale 4277 (NORVEGE)
- Laboratoire de Microbiologie Signaux et Microenvironnement (LMSM EA 4312) - Normandie Université - LMSM, 55 rue Saint-Germain, 27000 Evreux, France & Structure Fédérative de Recherche Normandie Végétale 4277 (NORVEGE)
| | - Xavier Latour
- Laboratoire de Microbiologie Signaux et Microenvironnement (LMSM EA 4312) - Normandie Université - LMSM, 55 rue Saint-Germain, 27000 Evreux, France & Structure Fédérative de Recherche Normandie Végétale 4277 (NORVEGE)
- Laboratoire de Microbiologie Signaux et Microenvironnement (LMSM EA 4312) - Normandie Université - LMSM, 55 rue Saint-Germain, 27000 Evreux, France & Structure Fédérative de Recherche Normandie Végétale 4277 (NORVEGE)
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10
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Fan X, Ye T, Li Q, Bhatt P, Zhang L, Chen S. Potential of a Quorum Quenching Bacteria Isolate Ochrobactrum intermedium D-2 Against Soft Rot Pathogen Pectobacterium carotovorum subsp. carotovorum. Front Microbiol 2020; 11:898. [PMID: 32457732 PMCID: PMC7227377 DOI: 10.3389/fmicb.2020.00898] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2019] [Accepted: 04/16/2020] [Indexed: 02/05/2023] Open
Abstract
Quorum quenching (QQ) is a promising strategy for preventing and controlling quorum sensing (QS)-mediated bacterial infections. It interferes with QS by the inhibition of signal synthesis, the detection of enzyme-catalyzed degradation, and the modification of signals. N-Acyl homoserine lactones (AHLs) represent a family of widely conserved QS signals involved in the regulation of virulence factor production in many Gram-negative bacterial pathogens. In this study, AHL-degrading bacterial strains were isolated, and the most efficient one was evaluated for its potential against QS-mediated pathogens. Results showed that an AHL-degrading bacteria Ochrobactrum intermedium D-2 effectively attenuated maceration produced by the pathogen Pectobacterium carotovorum subsp. carotovorum (Pcc) on radish and potato slices. Strain D-2 exhibited a superior AHL degradation activity and efficiently degraded various AHLs, including N-hexanoyl-L-homoserine lactone (C6HSL), N-(3-oxohexanoyl)-L-homoserine lactone (3OC6HSL), N-(3-oxooctanoyl)-L-homoserine lactone (3OC8HSL), and N-(3-oxododecanoyl)-L-homoserine lactone (3OC12HSL). Analysis of the degradation products of AHL by gas chromatography-mass spectrometry led to the identification of N-cyclohexyl-propanamide and propanamide as the main intermediate products, suggesting that AHL was degraded by hydrolysis. Annotation and analysis of the whole genome sequence of strain D-2 revealed the presence of an AHL-lactonase, termed AidF. Moreover, the application of strain D-2 was able to substantially reduce the disease severity caused by Pcc on host plants. These results reveal the biochemical basis of a highly efficient AHL-degrading bacterial isolate and present the potential to attenuate Pcc virulence through QQ.
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Affiliation(s)
- Xinghui Fan
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, Guangdong Province Key Laboratory of Microbial Signals and Disease Control, Integrative Microbiology Research Centre, South China Agricultural University, Guangzhou, China.,Guangdong Laboratory for Lingnan Modern Agriculture, Guangzhou, China
| | - Tian Ye
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, Guangdong Province Key Laboratory of Microbial Signals and Disease Control, Integrative Microbiology Research Centre, South China Agricultural University, Guangzhou, China.,Guangdong Laboratory for Lingnan Modern Agriculture, Guangzhou, China
| | - Qiting Li
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, Guangdong Province Key Laboratory of Microbial Signals and Disease Control, Integrative Microbiology Research Centre, South China Agricultural University, Guangzhou, China.,Guangdong Laboratory for Lingnan Modern Agriculture, Guangzhou, China
| | - Pankaj Bhatt
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, Guangdong Province Key Laboratory of Microbial Signals and Disease Control, Integrative Microbiology Research Centre, South China Agricultural University, Guangzhou, China.,Guangdong Laboratory for Lingnan Modern Agriculture, Guangzhou, China
| | - Lianhui Zhang
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, Guangdong Province Key Laboratory of Microbial Signals and Disease Control, Integrative Microbiology Research Centre, South China Agricultural University, Guangzhou, China.,Guangdong Laboratory for Lingnan Modern Agriculture, Guangzhou, China
| | - Shaohua Chen
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, Guangdong Province Key Laboratory of Microbial Signals and Disease Control, Integrative Microbiology Research Centre, South China Agricultural University, Guangzhou, China.,Guangdong Laboratory for Lingnan Modern Agriculture, Guangzhou, China
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11
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Sarveswari HB, Solomon AP. Profile of the Intervention Potential of the Phylum Actinobacteria Toward Quorum Sensing and Other Microbial Virulence Strategies. Front Microbiol 2019; 10:2073. [PMID: 31636609 PMCID: PMC6787268 DOI: 10.3389/fmicb.2019.02073] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2019] [Accepted: 08/22/2019] [Indexed: 12/22/2022] Open
Abstract
The rapid dissemination of antimicrobial resistance amongst microorganisms and their deleterious effect on public health has propelled the exploration of alternative interventions that target microbial virulence rather than viability. In several microorganisms, the expression of virulence factors is controlled by quorum sensing systems. A comprehensive understanding into microbial quorum sensing systems, virulence strategies and pathogenesis has exposed potential targets whose attenuation may alleviate infectious diseases. Such virulence attenuating natural products sourced from the different phyla of bacteria from diverse ecosystems have been identified. In this review, we discuss chemical entities derived from the phylum Actinobacteria that have demonstrated the potential to inhibit microbial biofilms, enzymes, and other virulence factors both in vivo and in vitro. We also review Actinobacteria-derived compounds that can degrade quorum sensing signal molecules, and the genes encoding such molecules. As many Actinobacteria-derived compounds have been translated into pharmaceutically important agents including antibiotics, the identification of virulence attenuating compounds from this phylum exemplifies their significance as a prospective source for anti-virulent drugs.
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Affiliation(s)
| | - Adline Princy Solomon
- Quorum Sensing Laboratory, Centre for Research in Infectious Diseases (CRID), School of Chemical and Biotechnology, SASTRA Deemed to be University, Thanjavur, India
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12
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Chane A, Barbey C, Robert M, Merieau A, Konto-Ghiorghi Y, Beury-Cirou A, Feuilloley M, Pátek M, Gobert V, Latour X. Biocontrol of Soft Rot: Confocal Microscopy Highlights Virulent Pectobacterial Communication and Its Jamming by Rhodococcal Quorum-Quenching. MOLECULAR PLANT-MICROBE INTERACTIONS : MPMI 2019; 32:802-812. [PMID: 30645157 DOI: 10.1094/mpmi-11-18-0314-r] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Confocal laser-scanning microscopy was chosen to observe the colonization and damage caused by the soft rot Pectobacterium atrosepticum and the protection mediated by the biocontrol agent Rhodococcus erythropolis. We developed dual-color reporter strains suited for monitoring quorum-sensing and quorum-quenching activities leading to maceration or biocontrol, respectively. A constitutively expressed cyan or red fluorescent protein served as a cell tag for plant colonization, while an inducible expression reporter system based on the green fluorescent protein gene enabled the simultaneous recording of signaling molecule production, detection, or degradation. The dual-colored pathogen and biocontrol strains were used to coinoculate potato tubers. At cellular quorum, images revealed a strong pectobacterial quorum-sensing activity, especially at the plant cell walls, as well as a concomitant rhodococcal quorum-quenching response, at both the single-cell and microcolony levels. The generated biosensors appear to be promising and complementary tools useful for molecular and cellular studies of bacterial communication and interference.
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Affiliation(s)
- Andrea Chane
- 1 Laboratoire de Microbiologie Signaux et Microenvironnement (LMSM EA 4312)-Normandie Université-LMSM, 55 rue Saint-Germain, 27000 Evreux, France and Structure Fédérative de Recherche Normandie Végétale 4277
| | - Corinne Barbey
- 1 Laboratoire de Microbiologie Signaux et Microenvironnement (LMSM EA 4312)-Normandie Université-LMSM, 55 rue Saint-Germain, 27000 Evreux, France and Structure Fédérative de Recherche Normandie Végétale 4277
- 2 Seeds Innovation Protection Research and Environment, Route de la petite chaussée, 76110 Bretteville du Grand-Caux and Rue des Champs Potez, 62217 Achicourt, France
| | - Magalie Robert
- 1 Laboratoire de Microbiologie Signaux et Microenvironnement (LMSM EA 4312)-Normandie Université-LMSM, 55 rue Saint-Germain, 27000 Evreux, France and Structure Fédérative de Recherche Normandie Végétale 4277
| | - Annabelle Merieau
- 1 Laboratoire de Microbiologie Signaux et Microenvironnement (LMSM EA 4312)-Normandie Université-LMSM, 55 rue Saint-Germain, 27000 Evreux, France and Structure Fédérative de Recherche Normandie Végétale 4277
| | - Yoan Konto-Ghiorghi
- 1 Laboratoire de Microbiologie Signaux et Microenvironnement (LMSM EA 4312)-Normandie Université-LMSM, 55 rue Saint-Germain, 27000 Evreux, France and Structure Fédérative de Recherche Normandie Végétale 4277
| | - Amélie Beury-Cirou
- 2 Seeds Innovation Protection Research and Environment, Route de la petite chaussée, 76110 Bretteville du Grand-Caux and Rue des Champs Potez, 62217 Achicourt, France
- 3 French Federation of seed potato growers (FN3PT/RD3PT), 43-45 rue de Naples, 75008 Paris, France
| | - Marc Feuilloley
- 1 Laboratoire de Microbiologie Signaux et Microenvironnement (LMSM EA 4312)-Normandie Université-LMSM, 55 rue Saint-Germain, 27000 Evreux, France and Structure Fédérative de Recherche Normandie Végétale 4277
| | - Miroslav Pátek
- 4 Institute of Microbiology of the CAS, v.v.i. Vídeňská 1083, CZ-14220 Praha 4, Czech Republic
| | - Virginie Gobert
- 2 Seeds Innovation Protection Research and Environment, Route de la petite chaussée, 76110 Bretteville du Grand-Caux and Rue des Champs Potez, 62217 Achicourt, France
- 3 French Federation of seed potato growers (FN3PT/RD3PT), 43-45 rue de Naples, 75008 Paris, France
| | - Xavier Latour
- 1 Laboratoire de Microbiologie Signaux et Microenvironnement (LMSM EA 4312)-Normandie Université-LMSM, 55 rue Saint-Germain, 27000 Evreux, France and Structure Fédérative de Recherche Normandie Végétale 4277
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13
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Singh VK, Mishra A, Jha B. 3-Benzyl-Hexahydro-Pyrrolo[1,2-a]Pyrazine-1,4-Dione Extracted From Exiguobacterium indicum Showed Anti-biofilm Activity Against Pseudomonas aeruginosa by Attenuating Quorum Sensing. Front Microbiol 2019; 10:1269. [PMID: 31231348 PMCID: PMC6568026 DOI: 10.3389/fmicb.2019.01269] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2018] [Accepted: 05/22/2019] [Indexed: 11/13/2022] Open
Abstract
Bacterial cell-to-cell communication promotes biofilm formation and can potentially lead to multidrug resistance development. Quorum sensing inhibition (QSI) is an effective and widely employed strategy against biofilm formation. The extract from Exiguobacterium indicum SJ16, a gram-positive bacterium, isolated from the rhizosphere of Cyperus laevigatus showed significant anti-quorum sensing activity (about 99%) against the reference Chromobacterium violaceum CV026 strain without exerting any antibacterial effect. The potentially active QSI compound identified in the SJ16 extract was 3-Benzyl-hexahydro-pyrrolo[1, 2-a]pyrazine-1,4-dione. The SJ16 extract containing this active compound showed significant anti-quorum sensing activity against a model quorum sensing bacterium strain Pseudomonas aeruginosa PAO1 and a clinical isolate P. aeruginosa PAH by preventing biofilm formation without attenuating the cell growth within the biofilm. More specifically, the SJ16 extract changed the topography and architecture of the biofilm, thus preventing bacterial adherence and further development of the biofilm. Furthermore, it decreased virulence factors (rhamnolipid and pyocyanin), the bacterial motility, as well as the elastase, and protease activities in P. aeruginosa. Microarray analysis revealed the differential expression of quorum sensing regulatory genes. Based on these results, we herein propose a hypothetical model, characterizing the role of this QSI agent in the transcriptional regulation of quorum sensing in P. aeruginosa PAO1, demonstrating that this compound has significant drug-development potential. Further research is required to delineate its possible applications in therapeutics in the context of biofilm forming bacterial infections.
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Affiliation(s)
- Vijay K Singh
- Division of Biotechnology and Phycology, CSIR - Central Salt and Marine Chemicals Research Institute, Bhavnagar, India
| | - Avinash Mishra
- Division of Biotechnology and Phycology, CSIR - Central Salt and Marine Chemicals Research Institute, Bhavnagar, India
| | - Bhavanath Jha
- Division of Biotechnology and Phycology, CSIR - Central Salt and Marine Chemicals Research Institute, Bhavnagar, India
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14
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Chane A, Barbey C, Bourigault Y, Maillot O, Rodrigues S, Bouteiller M, Merieau A, Konto-Ghiorghi Y, Beury-Cirou A, Gattin R, Feuilloley M, Laval K, Gobert V, Latour X. A Flavor Lactone Mimicking AHL Quorum-Sensing Signals Exploits the Broad Affinity of the QsdR Regulator to Stimulate Transcription of the Rhodococcal qsd Operon Involved in Quorum-Quenching and Biocontrol Activities. Front Microbiol 2019; 10:786. [PMID: 31040836 PMCID: PMC6476934 DOI: 10.3389/fmicb.2019.00786] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2019] [Accepted: 03/27/2019] [Indexed: 12/19/2022] Open
Abstract
In many Gram-negative bacteria, virulence, and social behavior are controlled by quorum-sensing (QS) systems based on the synthesis and perception of N-acyl homoserine lactones (AHLs). Quorum-quenching (QQ) is currently used to disrupt bacterial communication, as a biocontrol strategy for plant crop protection. In this context, the Gram-positive bacterium Rhodococcus erythropolis uses a catabolic pathway to control the virulence of soft-rot pathogens by degrading their AHL signals. This QS signal degradation pathway requires the expression of the qsd operon, encoding the key enzyme QsdA, an intracellular lactonase that can hydrolyze a wide range of substrates. QsdR, a TetR-like family regulator, represses the expression of the qsd operon. During AHL degradation, this repression is released by the binding of the γ-butyrolactone ring of the pathogen signaling molecules to QsdR. We show here that a lactone designed to mimic quorum signals, γ-caprolactone, can act as an effector ligand of QsdR, triggering the synthesis of qsd operon-encoded enzymes. Interaction between γ-caprolactone and QsdR was demonstrated indirectly, by quantitative RT-PCR, molecular docking and transcriptional fusion approaches, and directly, in an electrophoretic mobility shift assay. This broad-affinity regulatory system demonstrates that preventive or curative quenching therapies could be triggered artificially and/or managed in a sustainable way by the addition of γ-caprolactone, a compound better known as cheap food additive. The biostimulation of QQ activity could therefore be used to counteract the lack of consistency observed in some large-scale biocontrol assays.
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Affiliation(s)
- Andrea Chane
- Laboratoire de Microbiologie Signaux et Microenvironnement (LMSM EA 4312) - Normandie Université, Université de Rouen Normandie, Évreux, France.,Structure Fédérative de Recherche Normandie Végétale 4277, Mont-Saint-Aignan, France
| | - Corinne Barbey
- Laboratoire de Microbiologie Signaux et Microenvironnement (LMSM EA 4312) - Normandie Université, Université de Rouen Normandie, Évreux, France.,Structure Fédérative de Recherche Normandie Végétale 4277, Mont-Saint-Aignan, France.,Seeds Innovation Protection Research and Environment, Achicourt, France.,Seeds Innovation Protection Research and Environment, Bretteville-du-Grand-Caux, France
| | - Yvann Bourigault
- Laboratoire de Microbiologie Signaux et Microenvironnement (LMSM EA 4312) - Normandie Université, Université de Rouen Normandie, Évreux, France.,Structure Fédérative de Recherche Normandie Végétale 4277, Mont-Saint-Aignan, France
| | - Olivier Maillot
- Laboratoire de Microbiologie Signaux et Microenvironnement (LMSM EA 4312) - Normandie Université, Université de Rouen Normandie, Évreux, France
| | - Sophie Rodrigues
- Laboratoire de Microbiologie Signaux et Microenvironnement (LMSM EA 4312) - Normandie Université, Université de Rouen Normandie, Évreux, France
| | - Mathilde Bouteiller
- Laboratoire de Microbiologie Signaux et Microenvironnement (LMSM EA 4312) - Normandie Université, Université de Rouen Normandie, Évreux, France.,Structure Fédérative de Recherche Normandie Végétale 4277, Mont-Saint-Aignan, France
| | - Annabelle Merieau
- Laboratoire de Microbiologie Signaux et Microenvironnement (LMSM EA 4312) - Normandie Université, Université de Rouen Normandie, Évreux, France.,Structure Fédérative de Recherche Normandie Végétale 4277, Mont-Saint-Aignan, France
| | - Yoan Konto-Ghiorghi
- Laboratoire de Microbiologie Signaux et Microenvironnement (LMSM EA 4312) - Normandie Université, Université de Rouen Normandie, Évreux, France
| | - Amélie Beury-Cirou
- Seeds Innovation Protection Research and Environment, Achicourt, France.,Seeds Innovation Protection Research and Environment, Bretteville-du-Grand-Caux, France.,French Federation of Seed Potato Growers (FN3PT/RD3PT), Paris, France
| | - Richard Gattin
- Structure Fédérative de Recherche Normandie Végétale 4277, Mont-Saint-Aignan, France.,Institut Polytechnique UniLaSalle, UP Transformations & Agro-Ressources, Mont-Saint-Aignan, France
| | - Marc Feuilloley
- Laboratoire de Microbiologie Signaux et Microenvironnement (LMSM EA 4312) - Normandie Université, Université de Rouen Normandie, Évreux, France
| | - Karine Laval
- Structure Fédérative de Recherche Normandie Végétale 4277, Mont-Saint-Aignan, France.,Institut Polytechnique UniLaSalle, UP Aghyle, Mont-Saint-Aignan, France
| | - Virginie Gobert
- Seeds Innovation Protection Research and Environment, Achicourt, France.,Seeds Innovation Protection Research and Environment, Bretteville-du-Grand-Caux, France.,French Federation of Seed Potato Growers (FN3PT/RD3PT), Paris, France
| | - Xavier Latour
- Laboratoire de Microbiologie Signaux et Microenvironnement (LMSM EA 4312) - Normandie Université, Université de Rouen Normandie, Évreux, France.,Structure Fédérative de Recherche Normandie Végétale 4277, Mont-Saint-Aignan, France
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15
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Torres M, Dessaux Y, Llamas I. Saline Environments as a Source of Potential Quorum Sensing Disruptors to Control Bacterial Infections: A Review. Mar Drugs 2019; 17:md17030191. [PMID: 30934619 PMCID: PMC6471967 DOI: 10.3390/md17030191] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2019] [Revised: 03/19/2019] [Accepted: 03/20/2019] [Indexed: 12/12/2022] Open
Abstract
Saline environments, such as marine and hypersaline habitats, are widely distributed around the world. They include sea waters, saline lakes, solar salterns, or hypersaline soils. The bacteria that live in these habitats produce and develop unique bioactive molecules and physiological pathways to cope with the stress conditions generated by these environments. They have been described to produce compounds with properties that differ from those found in non-saline habitats. In the last decades, the ability to disrupt quorum-sensing (QS) intercellular communication systems has been identified in many marine organisms, including bacteria. The two main mechanisms of QS interference, i.e., quorum sensing inhibition (QSI) and quorum quenching (QQ), appear to be a more frequent phenomenon in marine aquatic environments than in soils. However, data concerning bacteria from hypersaline habitats is scarce. Salt-tolerant QSI compounds and QQ enzymes may be of interest to interfere with QS-regulated bacterial functions, including virulence, in sectors such as aquaculture or agriculture where salinity is a serious environmental issue. This review provides a global overview of the main works related to QS interruption in saline environments as well as the derived biotechnological applications.
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Affiliation(s)
- Marta Torres
- Department of Microbiology, Faculty of Pharmacy, University of Granada, 18071 Granada, Spain.
- Institute of Biotechnology, Biomedical Research Center (CIBM), University of Granada, 18100 Granada, Spain.
- Institute for Integrative Biology of the Cell (I2BC), CEA/CNRS/University Paris-Sud, University Paris-Saclay, 91198 Gif-sur-Yvette, France.
| | - Yves Dessaux
- Institute for Integrative Biology of the Cell (I2BC), CEA/CNRS/University Paris-Sud, University Paris-Saclay, 91198 Gif-sur-Yvette, France.
| | - Inmaculada Llamas
- Department of Microbiology, Faculty of Pharmacy, University of Granada, 18071 Granada, Spain.
- Institute of Biotechnology, Biomedical Research Center (CIBM), University of Granada, 18100 Granada, Spain.
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16
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Yu H, Lee K, Zhang X, Choo KH. Core-shell structured quorum quenching beads for more sustainable anti-biofouling in membrane bioreactors. WATER RESEARCH 2019; 150:321-329. [PMID: 30530126 DOI: 10.1016/j.watres.2018.11.071] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/22/2018] [Revised: 10/22/2018] [Accepted: 11/27/2018] [Indexed: 06/09/2023]
Abstract
Efficient media designs for microbial quorum quenching (QQ) are essential to enable maximal biofouling control in membrane bioreactors (MBRs). Here we introduce a novel, double-layered, biocarrier design, which has QQ bacteria in the shell layer with biostimulating agents in the core, for effective membrane biofouling control. Confining the biostimulant within dense polymer materials permits its controlled release over an extended period. The provision of the biostimulant from the core to the outer shell, where the QQ bacteria are encapsulated, facilitates their prolonged survival and active life. The core-shell structured QQ bead with the stimulant inside, which inhibits biofilm formation, shows the best fouling mitigation in laboratory testing of MBRs, while enhancing signal molecule degradation and lowering exopolymer secretion. This new, layered QQ bead, which has dual functions of bioaugmentation and biostimulation, supports a highly efficient and sustainable anti-biofouling strategy.
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Affiliation(s)
- Huarong Yu
- Advanced Institute of Water Industry, Kyungpook National University, 80 Daehak-ro, Buk-gu, Daegu, 41566, Republic of Korea; School of Municipal and Environmental Engineering, Harbin Institute of Technology, 73 Huanghe Road, Nangang, Harbin, 150090, People's Republic of China
| | - Kibaek Lee
- Advanced Institute of Water Industry, Kyungpook National University, 80 Daehak-ro, Buk-gu, Daegu, 41566, Republic of Korea
| | - Xiaolei Zhang
- Advanced Institute of Water Industry, Kyungpook National University, 80 Daehak-ro, Buk-gu, Daegu, 41566, Republic of Korea
| | - Kwang-Ho Choo
- Advanced Institute of Water Industry, Kyungpook National University, 80 Daehak-ro, Buk-gu, Daegu, 41566, Republic of Korea; Department of Environmental Engineering, Kyungpook National University, 80 Daehak-ro, Buk-gu, Daegu, 41566, Republic of Korea.
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17
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Francis IM, Vereecke D. Plant-Associated Rhodococcus Species, for Better and for Worse. BIOLOGY OF RHODOCOCCUS 2019. [DOI: 10.1007/978-3-030-11461-9_13] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
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18
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Lee K, Yu H, Zhang X, Choo KH. Quorum sensing and quenching in membrane bioreactors: Opportunities and challenges for biofouling control. BIORESOURCE TECHNOLOGY 2018; 270:656-668. [PMID: 30213542 DOI: 10.1016/j.biortech.2018.09.019] [Citation(s) in RCA: 61] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/28/2018] [Revised: 09/01/2018] [Accepted: 09/03/2018] [Indexed: 05/06/2023]
Abstract
Membrane biofouling, due to biofilm growth after planktonic bacteria attachment to a membrane, is a major bottleneck limiting the energy-efficient operation and maintenance of membrane bioreactors (MBRs). Microbial communications, known as quorum sensing (QS), are responsible for this biofouling behavior. Novel strategies for stopping this communication, known as quorum quenching (QQ), appear to be successful for biofouling control in MBRs used for wastewater treatment. This review describes recent information regarding the signal molecules and mechanisms responsible for QS behaviors, promising approaches for QQ (enzymatic, bacterial, fungal, photocatalytic, mimicking, and biostimulating methods), and efficient fabrication and use of QQ media for MBR applications. We discuss the opportunities and challenges of QQ techniques for their further improvement and practical use in MBRs.
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Affiliation(s)
- Kibaek Lee
- Advanced Institute of Water Industry, Kyungpook National University, 80 Daehak-ro, Buk-gu, Daegu 41566, Republic of Korea
| | - Huarong Yu
- School of Municipal and Environmental Engineering, Harbin Institute of Technology, 73 Huanghe Road, Nangang, Harbin 150090, People's Republic of China
| | - Xiaolei Zhang
- Advanced Institute of Water Industry, Kyungpook National University, 80 Daehak-ro, Buk-gu, Daegu 41566, Republic of Korea
| | - Kwang-Ho Choo
- Advanced Institute of Water Industry, Kyungpook National University, 80 Daehak-ro, Buk-gu, Daegu 41566, Republic of Korea; Department of Environmental Engineering, Kyungpook National University, 80 Daehak-ro, Buk-gu, Daegu 41566, Republic of Korea.
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Barbey C, Chane A, Burini JF, Maillot O, Merieau A, Gallique M, Beury-Cirou A, Konto-Ghiorghi Y, Feuilloley M, Gobert V, Latour X. A Rhodococcal Transcriptional Regulatory Mechanism Detects the Common Lactone Ring of AHL Quorum-Sensing Signals and Triggers the Quorum-Quenching Response. Front Microbiol 2018; 9:2800. [PMID: 30524404 PMCID: PMC6262395 DOI: 10.3389/fmicb.2018.02800] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2018] [Accepted: 10/31/2018] [Indexed: 01/08/2023] Open
Abstract
The biocontrol agent Rhodococcus erythropolis disrupts virulence of plant and human Gram-negative pathogens by catabolizing their N-acyl-homoserine lactones. This quorum-quenching activity requires the expression of the qsd (quorum-sensing signal degradation) operon, which encodes the lactonase QsdA and the fatty acyl-CoA ligase QsdC, involved in the catabolism of lactone ring and acyl chain moieties of signaling molecules, respectively. Here, we demonstrate the regulation of qsd operon expression by a TetR-like family repressor, QsdR. This repression was lifted by adding the pathogen quorum signal or by deleting the qsdR gene, resulting in enhanced lactone degrading activity. Using interactomic approaches and transcriptional fusion strategy, the qsd operon derepression was elucidated: it is operated by the binding of the common part of signaling molecules, the homoserine lactone ring, to the effector-receiving domain of QsdR, preventing a physical binding of QsdR to the qsd promoter region. To our knowledge, this is the first evidence revealing quorum signals as inducers of the suitable quorum-quenching pathway, confirming this TetR-like protein as a lactone sensor. This regulatory mechanism designates the qsd operon as encoding a global disrupting pathway for degrading a wide range of signal substrates, allowing a broad spectrum anti-virulence activity mediated by the rhodococcal biocontrol agent. Understanding the regulation mechanisms of qsd operon expression led also to the development of biosensors useful to monitor in situ the presence of exogenous signals and quorum-quenching activity.
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Affiliation(s)
- Corinne Barbey
- Laboratoire de Microbiologie Signaux et Microenvironnement (LMSM EA 4312) - Normandie Université - LMSM, Évreux, France.,Structure Fédérative de Recherche Normandie Végétal 4277 (NORVEGE), Mont-Saint-Aignan, France.,Seeds Innovation Protection Research and Environment, Achicourt, France.,Seeds Innovation Protection Research and Environment, Bretteville du Grand-Caux, France
| | - Andrea Chane
- Laboratoire de Microbiologie Signaux et Microenvironnement (LMSM EA 4312) - Normandie Université - LMSM, Évreux, France.,Structure Fédérative de Recherche Normandie Végétal 4277 (NORVEGE), Mont-Saint-Aignan, France
| | - Jean-François Burini
- Laboratoire de Microbiologie Signaux et Microenvironnement (LMSM EA 4312) - Normandie Université - LMSM, Évreux, France.,Structure Fédérative de Recherche Normandie Végétal 4277 (NORVEGE), Mont-Saint-Aignan, France
| | - Olivier Maillot
- Laboratoire de Microbiologie Signaux et Microenvironnement (LMSM EA 4312) - Normandie Université - LMSM, Évreux, France.,Structure Fédérative de Recherche Normandie Végétal 4277 (NORVEGE), Mont-Saint-Aignan, France
| | - Annabelle Merieau
- Laboratoire de Microbiologie Signaux et Microenvironnement (LMSM EA 4312) - Normandie Université - LMSM, Évreux, France.,Structure Fédérative de Recherche Normandie Végétal 4277 (NORVEGE), Mont-Saint-Aignan, France
| | - Mathias Gallique
- Laboratoire de Microbiologie Signaux et Microenvironnement (LMSM EA 4312) - Normandie Université - LMSM, Évreux, France.,Structure Fédérative de Recherche Normandie Végétal 4277 (NORVEGE), Mont-Saint-Aignan, France
| | - Amélie Beury-Cirou
- Seeds Innovation Protection Research and Environment, Achicourt, France.,Seeds Innovation Protection Research and Environment, Bretteville du Grand-Caux, France.,French Federation of Seed Potato Growers (FN3PT/RD3PT), Paris, France
| | - Yoan Konto-Ghiorghi
- Laboratoire de Microbiologie Signaux et Microenvironnement (LMSM EA 4312) - Normandie Université - LMSM, Évreux, France.,Structure Fédérative de Recherche Normandie Végétal 4277 (NORVEGE), Mont-Saint-Aignan, France
| | - Marc Feuilloley
- Laboratoire de Microbiologie Signaux et Microenvironnement (LMSM EA 4312) - Normandie Université - LMSM, Évreux, France.,Structure Fédérative de Recherche Normandie Végétal 4277 (NORVEGE), Mont-Saint-Aignan, France
| | - Virginie Gobert
- Seeds Innovation Protection Research and Environment, Achicourt, France.,Seeds Innovation Protection Research and Environment, Bretteville du Grand-Caux, France.,French Federation of Seed Potato Growers (FN3PT/RD3PT), Paris, France
| | - Xavier Latour
- Laboratoire de Microbiologie Signaux et Microenvironnement (LMSM EA 4312) - Normandie Université - LMSM, Évreux, France.,Structure Fédérative de Recherche Normandie Végétal 4277 (NORVEGE), Mont-Saint-Aignan, France
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20
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Besset-Manzoni Y, Rieusset L, Joly P, Comte G, Prigent-Combaret C. Exploiting rhizosphere microbial cooperation for developing sustainable agriculture strategies. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2018; 25:29953-29970. [PMID: 29313197 DOI: 10.1007/s11356-017-1152-2] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/01/2017] [Accepted: 12/26/2017] [Indexed: 05/23/2023]
Abstract
The rhizosphere hosts a considerable microbial community. Among that community, bacteria called plant growth-promoting rhizobacteria (PGPR) can promote plant growth and defense against diseases using diverse distinct plant-beneficial functions. Crop inoculation with PGPR could allow to reduce the use of pesticides and fertilizers in agrosystems. However, microbial crop protection and growth stimulation would be more efficient if cooperation between rhizosphere bacterial populations was taken into account when developing biocontrol agents and biostimulants. Rhizospheric bacteria live in multi-species biofilms formed all along the root surface or sometimes inside the plants (i.e., endophyte). PGPR cooperate with their host plants and also with other microbial populations inside biofilms. These interactions are mediated by a large diversity of microbial metabolites and physical signals that trigger cell-cell communication and appropriate responses. A better understanding of bacterial behavior and microbial cooperation in the rhizosphere could allow for a more successful use of bacteria in sustainable agriculture. This review presents an ecological view of microbial cooperation in agrosystems and lays the emphasis on the main microbial metabolites involved in microbial cooperation, plant health protection, and plant growth stimulation. Eco-friendly inoculant consortia that will foster microbe-microbe and microbe-plant cooperation can be developed to promote crop growth and restore biodiversity and functions lost in agrosystems.
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Affiliation(s)
- Yoann Besset-Manzoni
- UMR Ecologie Microbienne, CNRS, INRA, VetAgro Sup, UCBL, Université de Lyon, 43 bd du 11 Novembre 1918, F-69622, Villeurbanne cedex, France
- Biovitis, 15 400, Saint Etienne-de-Chomeil, France
| | - Laura Rieusset
- UMR Ecologie Microbienne, CNRS, INRA, VetAgro Sup, UCBL, Université de Lyon, 43 bd du 11 Novembre 1918, F-69622, Villeurbanne cedex, France
| | - Pierre Joly
- Biovitis, 15 400, Saint Etienne-de-Chomeil, France
| | - Gilles Comte
- UMR Ecologie Microbienne, CNRS, INRA, VetAgro Sup, UCBL, Université de Lyon, 43 bd du 11 Novembre 1918, F-69622, Villeurbanne cedex, France
| | - Claire Prigent-Combaret
- UMR Ecologie Microbienne, CNRS, INRA, VetAgro Sup, UCBL, Université de Lyon, 43 bd du 11 Novembre 1918, F-69622, Villeurbanne cedex, France.
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21
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Singh VK, Mishra A, Jha B. Anti-quorum Sensing and Anti-biofilm Activity of Delftia tsuruhatensis Extract by Attenuating the Quorum Sensing-Controlled Virulence Factor Production in Pseudomonas aeruginosa. Front Cell Infect Microbiol 2017; 7:337. [PMID: 28798903 PMCID: PMC5526841 DOI: 10.3389/fcimb.2017.00337] [Citation(s) in RCA: 67] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2017] [Accepted: 07/10/2017] [Indexed: 11/13/2022] Open
Abstract
Multidrug-resistance bacteria commonly use cell-to-cell communication that leads to biofilm formation as one of the mechanisms for developing resistance. Quorum sensing inhibition (QSI) is an effective approach for the prevention of biofilm formation. A Gram-negative bacterium, Delftia tsuruhatensis SJ01, was isolated from the rhizosphere of a species of sedge (Cyperus laevigatus) grown along the coastal-saline area. The isolate SJ01 culture and bacterial crude extract showed QSI activity in the biosensor plate containing the reference strain Chromobacterium violaceum CV026. A decrease in the violacein production of approximately 98% was detected with the reference strain C. violaceum CV026. The bacterial extract (strain SJ01) exhibited anti-quorum sensing activity and inhibited the biofilm formation of clinical isolates wild-type Pseudomonas aeruginosa PAO1 and P. aeruginosa PAH. A non-toxic effect of the bacterial extract (SJ01) was detected on the cell growth of the reference strains as P. aeruginosa viable cells were present within the biofilm. It is hypothesized that the extract (SJ01) may change the topography of the biofilm and thus prevent bacterial adherence on the biofilm surface. The extract also inhibits the motility, virulence factors (pyocyanin and rhamnolipid) and activity (elastase and protease) in P. aeruginosa treated with SJ01 extract. The potential active compound present was identified as 1,2-benzenedicarboxylic acid, diisooctyl ester. Microarray and transcript expression analysis unveiled differential expression of quorum sensing regulatory genes. The key regulatory genes, LasI, LasR, RhlI, and RhlR were down-regulated in the P. aeruginosa analyzed by quantitative RT-PCR. A hypothetical model was generated of the transcriptional regulatory mechanism inferred in P. aeruginosa for quorum sensing, which will provide useful insight to develop preventive strategies against the biofilm formation. The potential active compound identified, 1,2-benzenedicarboxylic acid, diisooctyl ester, has the potential to be used as an anti-pathogenic drug for the treatment of biofilm-forming pathogenic bacteria. For that, a detailed study is needed to investigate the possible applications.
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Affiliation(s)
- Vijay K Singh
- Marine Biotechnology and Ecology Division, CSIR-Central Salt and Marine Chemicals Research InstituteBhavnagar, India
| | - Avinash Mishra
- Marine Biotechnology and Ecology Division, CSIR-Central Salt and Marine Chemicals Research InstituteBhavnagar, India
| | - Bhavanath Jha
- Marine Biotechnology and Ecology Division, CSIR-Central Salt and Marine Chemicals Research InstituteBhavnagar, India
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22
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Garge SS, Nerurkar AS. Evaluation of quorum quenching Bacillus spp. for their biocontrol traits against Pectobacterium carotovorum subsp. carotovorum causing soft rot. BIOCATALYSIS AND AGRICULTURAL BIOTECHNOLOGY 2017. [DOI: 10.1016/j.bcab.2016.11.004] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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23
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Ma ZP, Lao YM, Jin H, Lin GH, Cai ZH, Zhou J. Diverse Profiles of AI-1 Type Quorum Sensing Molecules in Cultivable Bacteria from the Mangrove ( Kandelia obovata) Rhizosphere Environment. Front Microbiol 2016; 7:1957. [PMID: 27994584 PMCID: PMC5136546 DOI: 10.3389/fmicb.2016.01957] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2016] [Accepted: 11/22/2016] [Indexed: 11/25/2022] Open
Abstract
Mangrove rhizosphere environment harbors diverse populations of microbes, and some evidence showed that rhizobacteria behavior was regulated by quorum sensing (QS). Investigating the diverse profiles of QS molecules in mangrove ecosystems may shed light on the bacterial roles and lead to a better understanding of the symbiotic interactions between plants and microbes. The aims of the current study focus on identifying AI-1 type QS signals, i.e., acyl homoserine lactones (AHLs), in Kandelia obovata rhizosphere environment. Approximately 1200 rhizobacteria were screened and 184 strains (15.3%) tested were positive. Subsequent 16s rRNA gene sequencing and dereplication analyses identified 24 species from the positive isolates, which were affiliated to three different phyla, including Proteobacteria, Firmicutes, and Actinobacteria. Thin-layer chromatography separation of extracts revealed diverse AHL profiles and detected at least one active compound in the supernatant of these 24 cultivable AHL-producers. The active extracts from these bacterial isolates were further evaluated by ultra performance liquid chromatography-mass spectrometry, and the carbon side chain length ranged from C4 to C14. This is the first report on the diversity of AI-1 type auto-inducers in the mangrove plant K. obovata, and it is imperative to expand our knowledge of plant-bacteria interactions with respect to the maintenance of wetland ecosystem health.
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Affiliation(s)
- Zhi P Ma
- The Division of Ocean Science and Technology, Graduate School at Shenzhen, Tsinghua UniversityShenzhen, China; Shenzhen Public Platform for Screening and Application of Marine Microbial ResourcesShenzhen, China
| | - Yong M Lao
- The Division of Ocean Science and Technology, Graduate School at Shenzhen, Tsinghua UniversityShenzhen, China; Shenzhen Public Platform for Screening and Application of Marine Microbial ResourcesShenzhen, China
| | - Hui Jin
- The Division of Ocean Science and Technology, Graduate School at Shenzhen, Tsinghua UniversityShenzhen, China; Shenzhen Public Platform for Screening and Application of Marine Microbial ResourcesShenzhen, China
| | - Guang H Lin
- The Division of Ocean Science and Technology, Graduate School at Shenzhen, Tsinghua University Shenzhen, China
| | - Zhong H Cai
- The Division of Ocean Science and Technology, Graduate School at Shenzhen, Tsinghua UniversityShenzhen, China; Shenzhen Public Platform for Screening and Application of Marine Microbial ResourcesShenzhen, China
| | - Jin Zhou
- The Division of Ocean Science and Technology, Graduate School at Shenzhen, Tsinghua UniversityShenzhen, China; Shenzhen Public Platform for Screening and Application of Marine Microbial ResourcesShenzhen, China
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24
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Garge SS, Nerurkar AS. Attenuation of Quorum Sensing Regulated Virulence of Pectobacterium carotovorum subsp. carotovorum through an AHL Lactonase Produced by Lysinibacillus sp. Gs50. PLoS One 2016; 11:e0167344. [PMID: 27911925 PMCID: PMC5135098 DOI: 10.1371/journal.pone.0167344] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2016] [Accepted: 11/11/2016] [Indexed: 11/24/2022] Open
Abstract
Quorum sensing (QS) is a mechanism in which Gram negative bacterial pathogens sense their population density through acyl homoserine lactones (AHLs) and regulate the expression of virulence factors. Enzymatic degradation of AHLs by lactonases, known as quorum quenching (QQ), is thus a potential strategy for attenuating QS regulated bacterial infections. We characterised the QQ activity of soil isolate Lysinibacillus sp. Gs50 and explored its potential for controlling bacterial soft rot of crop plants. Lysinibacillus sp. Gs50 inactivated AHL, which could be restored upon acidification, suggested that inactivation was due to the lactone ring hydrolysis of AHL. Heterologous expression of cloned gene for putative hydrolase (792 bp) designated adeH from Lysinibacillus sp. Gs50 produced a ~29 kDa protein which degraded AHLs of varying chain length. Mass spectrometry analysis of AdeH enzymatic reaction product revealed that AdeH hydrolyses the lactone ring of AHL and hence is an AHL lactonase. Multiple sequence alignment of the amino acid sequence of AdeH showed that it belongs to the metallo- β- lactamase superfamily, has a conserved “HXHXDH” motif typical of AHL lactonases. KM for AdeH for C6HSL was found to be 3.089 μM and the specific activity was 0.8 picomol min-1μg-1. AdeH has not so far been reported from any Lysinibacillus sp. and has less than 40% identity with known AHL lactonases. Finally we found that Lysinibacillus sp. Gs50 can degrade AHL produced by Pectobacterium carotovorum subsp. carotovorum (Pcc), a common cause of soft rot. This QQ activity causes a decrease in production of plant cell wall degrading enzymes of Pcc and attenuates symptoms of soft rot in experimental infection of potato, carrot and cucumber. Our results demonstrate the potential of Lysinibacillus sp. Gs50 as a preventive and curative biocontrol agent.
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Affiliation(s)
- Sneha S Garge
- Department of Microbiology and Biotechnology Centre, Faculty of Science, The Maharaja Sayajirao University of Baroda, Vadodara, Gujarat, India
| | - Anuradha S Nerurkar
- Department of Microbiology and Biotechnology Centre, Faculty of Science, The Maharaja Sayajirao University of Baroda, Vadodara, Gujarat, India
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25
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Yu H, Liang H, Qu F, He J, Xu G, Hu H, Li G. Biofouling control by biostimulation of quorum-quenching bacteria in a membrane bioreactor for wastewater treatment. Biotechnol Bioeng 2016; 113:2624-2632. [DOI: 10.1002/bit.26039] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2016] [Revised: 06/12/2016] [Accepted: 06/23/2016] [Indexed: 11/11/2022]
Affiliation(s)
- Huarong Yu
- State Key Laboratory of Urban Water Resource and Environment (SKLUWRE); Harbin Institute of Technology; 73 Huanghe Road, Nangang District Harbin 150090 P.R. China
| | - Heng Liang
- State Key Laboratory of Urban Water Resource and Environment (SKLUWRE); Harbin Institute of Technology; 73 Huanghe Road, Nangang District Harbin 150090 P.R. China
| | - Fangshu Qu
- State Key Laboratory of Urban Water Resource and Environment (SKLUWRE); Harbin Institute of Technology; 73 Huanghe Road, Nangang District Harbin 150090 P.R. China
| | - Junguo He
- State Key Laboratory of Urban Water Resource and Environment (SKLUWRE); Harbin Institute of Technology; 73 Huanghe Road, Nangang District Harbin 150090 P.R. China
| | - Guoren Xu
- State Key Laboratory of Urban Water Resource and Environment (SKLUWRE); Harbin Institute of Technology; 73 Huanghe Road, Nangang District Harbin 150090 P.R. China
| | - Huizhi Hu
- State Key Laboratory of Urban Water Resource and Environment (SKLUWRE); Harbin Institute of Technology; 73 Huanghe Road, Nangang District Harbin 150090 P.R. China
| | - Guibai Li
- State Key Laboratory of Urban Water Resource and Environment (SKLUWRE); Harbin Institute of Technology; 73 Huanghe Road, Nangang District Harbin 150090 P.R. China
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26
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Dessaux Y, Grandclément C, Faure D. Engineering the Rhizosphere. TRENDS IN PLANT SCIENCE 2016; 21:266-278. [PMID: 26818718 DOI: 10.1016/j.tplants.2016.01.002] [Citation(s) in RCA: 93] [Impact Index Per Article: 11.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/14/2015] [Revised: 12/14/2015] [Accepted: 01/04/2016] [Indexed: 05/25/2023]
Abstract
All components of the rhizosphere can be engineered to promote plant health and growth, two features that strongly depend upon the interactions of living organisms with their environment. This review describes the progress in plant and microbial molecular genetics and ecology that has led to a wealth of potential applications. Recent efforts especially deal with the plant defense machinery that is instrumental in engineering plant resistance to biotic stresses. Another approach involves microbial population engineering rather than single strain engineering. More generally, the plants (and the associated microbes) are no longer seen as 'individual' but rather as a holobiont, in other words a unit of selection in evolution, a concept that holds great promise for future plant breeding programs.
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Affiliation(s)
- Yves Dessaux
- Institute for Integrative Biology of the Cell (I2BC), Commissariat à l'Energie Atomique (CEA), Centre National de la Recherche Scientifique (CNRS), Université Paris-Sud, Université Paris-Saclay, 91198 Gif-sur-Yvette CEDEX, France.
| | - Catherine Grandclément
- Institute for Integrative Biology of the Cell (I2BC), Commissariat à l'Energie Atomique (CEA), Centre National de la Recherche Scientifique (CNRS), Université Paris-Sud, Université Paris-Saclay, 91198 Gif-sur-Yvette CEDEX, France
| | - Denis Faure
- Institute for Integrative Biology of the Cell (I2BC), Commissariat à l'Energie Atomique (CEA), Centre National de la Recherche Scientifique (CNRS), Université Paris-Sud, Université Paris-Saclay, 91198 Gif-sur-Yvette CEDEX, France
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27
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El Sahili A, Kwasiborski A, Mothe N, Velours C, Legrand P, Moréra S, Faure D. Natural Guided Genome Engineering Reveals Transcriptional Regulators Controlling Quorum-Sensing Signal Degradation. PLoS One 2015; 10:e0141718. [PMID: 26554837 PMCID: PMC4640858 DOI: 10.1371/journal.pone.0141718] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2015] [Accepted: 10/12/2015] [Indexed: 11/24/2022] Open
Abstract
Quorum-quenching (QQ) are natural or engineered processes disrupting the quorum-sensing (QS) signalling which controls virulence and persistence (e.g. biofilm) in numerous bacteria. QQ involves different enzymes including lactonases, amidases, oxidases and reductases which degrade the QS molecules such as N-acylhomoserine lactones (NAHL). Rhodococcus erythropolis known to efficiently degrade NAHL is proposed as a biocontrol agent and a reservoir of QQ-enzymes for biotechnology. In R. erythropolis, regulation of QQ-enzymes remains unclear. In this work, we performed genome engineering on R. erythropolis, which is recalcitrant to reverse genetics, in order to investigate regulation of QQ-enzymes at a molecular and structural level with the aim to improve the QQ activity. Deep-sequencing of the R. erythropolis enhanced variants allowed identification of a punctual mutation in a key-transcriptional factor QsdR (Quorum sensing degradation Regulation) which regulates the sole QQ-lactonase QsdA identified so far. Using biophysical and structural studies on QsdR, we demonstrate that QQ activity can be improved by modifying the regulation of QQ-enzymes degrading QS signal. This modification requiring the change of only one amino-acid in a transcriptional factor leads to an enhanced R. erythropolis in which the QS-signal degradation pathway is strongly activated.
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Affiliation(s)
- Abbas El Sahili
- Institute for Integrative Biology of the Cell (I2BC), CNRS, CEA, Univ. Paris-Sud, Université Paris-Saclay, 91198 Gif-sur-Yvette Cedex, France
| | - Anthony Kwasiborski
- Institute for Integrative Biology of the Cell (I2BC), CNRS, CEA, Univ. Paris-Sud, Université Paris-Saclay, 91198 Gif-sur-Yvette Cedex, France
| | - Nicolas Mothe
- Institute for Integrative Biology of the Cell (I2BC), CNRS, CEA, Univ. Paris-Sud, Université Paris-Saclay, 91198 Gif-sur-Yvette Cedex, France
| | - Christophe Velours
- Institute for Integrative Biology of the Cell (I2BC), CNRS, CEA, Univ. Paris-Sud, Université Paris-Saclay, 91198 Gif-sur-Yvette Cedex, France
| | - Pierre Legrand
- Synchrotron SOLEIL, L’Orme des Merisiers, Saint Aubin BP48, Gif-sur-Yvette 91198, France
| | - Solange Moréra
- Institute for Integrative Biology of the Cell (I2BC), CNRS, CEA, Univ. Paris-Sud, Université Paris-Saclay, 91198 Gif-sur-Yvette Cedex, France
- * E-mail: (SM); (DF)
| | - Denis Faure
- Institute for Integrative Biology of the Cell (I2BC), CNRS, CEA, Univ. Paris-Sud, Université Paris-Saclay, 91198 Gif-sur-Yvette Cedex, France
- * E-mail: (SM); (DF)
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28
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Biocontrol of the Potato Blackleg and Soft Rot Diseases Caused by Dickeya dianthicola. Appl Environ Microbiol 2015; 82:268-78. [PMID: 26497457 DOI: 10.1128/aem.02525-15] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2015] [Accepted: 10/16/2015] [Indexed: 11/20/2022] Open
Abstract
Development of protection tools targeting Dickeya species is an important issue in the potato production. Here, we present the identification and the characterization of novel biocontrol agents. Successive screenings of 10,000 bacterial isolates led us to retain 58 strains that exhibited growth inhibition properties against several Dickeya sp. and/or Pectobacterium sp. pathogens. Most of them belonged to the Pseudomonas and Bacillus genera. In vitro assays revealed a fitness decrease of the tested Dickeya sp. and Pectobacterium sp. pathogens in the presence of the biocontrol agents. In addition, four independent greenhouse assays performed to evaluate the biocontrol bacteria effect on potato plants artificially contaminated with Dickeya dianthicola revealed that a mix of three biocontrol agents, namely, Pseudomonas putida PA14H7 and Pseudomonas fluorescens PA3G8 and PA4C2, repeatedly decreased the severity of blackleg symptoms as well as the transmission of D. dianthicola to the tuber progeny. This work highlights the use of a combination of biocontrol strains as a potential strategy to limit the soft rot and blackleg diseases caused by D. dianthicola on potato plants and tubers.
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29
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Grandclément C, Tannières M, Moréra S, Dessaux Y, Faure D. Quorum quenching: role in nature and applied developments. FEMS Microbiol Rev 2015; 40:86-116. [PMID: 26432822 DOI: 10.1093/femsre/fuv038] [Citation(s) in RCA: 356] [Impact Index Per Article: 39.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/21/2015] [Indexed: 12/11/2022] Open
Abstract
Quorum sensing (QS) refers to the capacity of bacteria to monitor their population density and regulate gene expression accordingly: the QS-regulated processes deal with multicellular behaviors (e.g. growth and development of biofilm), horizontal gene transfer and host-microbe (symbiosis and pathogenesis) and microbe-microbe interactions. QS signaling requires the synthesis, exchange and perception of bacterial compounds, called autoinducers or QS signals (e.g. N-acylhomoserine lactones). The disruption of QS signaling, also termed quorum quenching (QQ), encompasses very diverse phenomena and mechanisms which are presented and discussed in this review. First, we surveyed the QS-signal diversity and QS-associated responses for a better understanding of the targets of the QQ phenomena that organisms have naturally evolved and are currently actively investigated in applied perspectives. Next the mechanisms, targets and molecular actors associated with QS interference are presented, with a special emphasis on the description of natural QQ enzymes and chemicals acting as QS inhibitors. Selected QQ paradigms are detailed to exemplify the mechanisms and biological roles of QS inhibition in microbe-microbe and host-microbe interactions. Finally, some QQ strategies are presented as promising tools in different fields such as medicine, aquaculture, crop production and anti-biofouling area.
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Affiliation(s)
- Catherine Grandclément
- Institut for Integrative Biology of the Cell, Department of Microbiology, CNRS CEA Paris-Sud University, Saclay Plant Sciences, Avenue de la Terrasse, 91198 Gif-sur-Yvette cedex, France
| | - Mélanie Tannières
- Institut for Integrative Biology of the Cell, Department of Microbiology, CNRS CEA Paris-Sud University, Saclay Plant Sciences, Avenue de la Terrasse, 91198 Gif-sur-Yvette cedex, France
| | - Solange Moréra
- Institut for Integrative Biology of the Cell, Department of Structural Biology, CNRS CEA Paris-Sud University, Avenue de la Terrasse, 91198 Gif-sur-Yvette cedex, France
| | - Yves Dessaux
- Institut for Integrative Biology of the Cell, Department of Microbiology, CNRS CEA Paris-Sud University, Saclay Plant Sciences, Avenue de la Terrasse, 91198 Gif-sur-Yvette cedex, France
| | - Denis Faure
- Institut for Integrative Biology of the Cell, Department of Microbiology, CNRS CEA Paris-Sud University, Saclay Plant Sciences, Avenue de la Terrasse, 91198 Gif-sur-Yvette cedex, France
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Tan CH, Koh KS, Xie C, Zhang J, Tan XH, Lee GP, Zhou Y, Ng WJ, Rice SA, Kjelleberg S. Community quorum sensing signalling and quenching: microbial granular biofilm assembly. NPJ Biofilms Microbiomes 2015; 1:15006. [PMID: 28721230 PMCID: PMC5515215 DOI: 10.1038/npjbiofilms.2015.6] [Citation(s) in RCA: 105] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2015] [Revised: 03/24/2015] [Accepted: 04/07/2015] [Indexed: 01/07/2023] Open
Abstract
Background: Recent reports exploring the role of gradients of quorum sensing (QS) signals in functional activated sludge have raised the question of whether shared systems of signalling synthesis and degradation, or quorum quenching (QQ), across the community inform of the means by which QS biology regulate floccular and granular biofilm assembly. Aims: In this study, we aimed to explore the species origin and interactive role of QS and QQ activities in such highly diverse microbial biofilm communities. Methods: Here, such aims were addressed systematically by a comprehensive multi-pronged RNA-sequencing, microbiological and analytical chemistry experimental approach, using two related but independently evolved floccular and granular sludge communities. Results: Our data revealed a distinct difference between the QS and QQ potentials of the two communities, with different species largely displaying either QS or QQ functions. The floccular sludge community showed a high rate of QQ activity, and this rate was dependent on the acyl chain length demonstrating specificity of degradation. When the floccular biomass was transformed into the granular sludge, the QQ activity of the community was reduced by 30%. N-acyl homoserine lactones with four to eight carbons on the acyl chain accumulated at the granular stage, and their concentrations were at least threefold higher than those of the floccular stage. These findings corroborated meta-community analysis where a major shift in the dominant species from potential signal quenchers to producers was observed during the transition from flocs to granules, indicating the role of species composition and associated signalling activities in coordinating community behaviours. Conclusions: This study suggests that QQ has an important function in regulating community level QS signalling, and provides a mechanistic insight into the role of QS biology in complex community assembly.
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Affiliation(s)
- Chuan Hao Tan
- Singapore Centre on Environmental Life Sciences Engineering (SCELSE), Nanyang Technological University, Singapore.,Advanced Environmental Biotechnology Centre (AEBC), Nanyang Environment and Water Research Institute (NEWRI), Nanyang Technological University, Singapore.,The School of Civil and Environmental Engineering, Nanyang Technological University, Singapore
| | - Kai Shyang Koh
- Singapore Centre on Environmental Life Sciences Engineering (SCELSE), Nanyang Technological University, Singapore
| | - Chao Xie
- Singapore Centre on Environmental Life Sciences Engineering (SCELSE), Nanyang Technological University, Singapore
| | - Joela Zhang
- The School of Civil and Environmental Engineering, Nanyang Technological University, Singapore
| | - Xiao Hui Tan
- The School of Biological Sciences, Nanyang Technological University, Singapore
| | - Guo Ping Lee
- Singapore Centre on Environmental Life Sciences Engineering (SCELSE), Nanyang Technological University, Singapore.,The School of Biological Sciences, Nanyang Technological University, Singapore
| | - Yan Zhou
- Advanced Environmental Biotechnology Centre (AEBC), Nanyang Environment and Water Research Institute (NEWRI), Nanyang Technological University, Singapore.,The School of Civil and Environmental Engineering, Nanyang Technological University, Singapore
| | - Wun Jern Ng
- Advanced Environmental Biotechnology Centre (AEBC), Nanyang Environment and Water Research Institute (NEWRI), Nanyang Technological University, Singapore.,The School of Civil and Environmental Engineering, Nanyang Technological University, Singapore
| | - Scott A Rice
- Singapore Centre on Environmental Life Sciences Engineering (SCELSE), Nanyang Technological University, Singapore.,The School of Biological Sciences, Nanyang Technological University, Singapore.,Centre for Marine Bio-Innovation and School of Biotechnology and Biomolecular Sciences, University of New South Wales, Sydney, Australia
| | - Staffan Kjelleberg
- Singapore Centre on Environmental Life Sciences Engineering (SCELSE), Nanyang Technological University, Singapore.,The School of Biological Sciences, Nanyang Technological University, Singapore.,Centre for Marine Bio-Innovation and School of Biotechnology and Biomolecular Sciences, University of New South Wales, Sydney, Australia
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Helman Y, Chernin L. Silencing the mob: disrupting quorum sensing as a means to fight plant disease. MOLECULAR PLANT PATHOLOGY 2015; 16:316-29. [PMID: 25113857 PMCID: PMC6638422 DOI: 10.1111/mpp.12180] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/17/2023]
Abstract
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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Affiliation(s)
- Yael Helman
- Department of Plant Pathology and Microbiology, The Robert H. Smith Faculty of Agriculture, Food and Environment, The Hebrew University of Jerusalem, Rehovot, Israel
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Kwasiborski A, Mondy S, Chong TM, Chan KG, Beury-Cirou A, Faure D. Core genome and plasmidome of the quorum-quenching bacterium Rhodococcus erythropolis. Genetica 2015; 143:253-61. [PMID: 25676013 DOI: 10.1007/s10709-015-9827-4] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2014] [Accepted: 02/03/2015] [Indexed: 12/22/2022]
Abstract
Rhodococcus erythropolis is a worldwide-distributed actinobacterium that exhibits a remarkable metabolic versatility illustrated by its ability to degrade complex compounds, such as quorum-sensing signals N-acylhomoserine lactones (NAHLs), phenols, sterols and fuel derivatives. Because of its catabolic properties, R. erythropolis strains are proposed as anti-biofouling agents against NAHL-dependent biofilms, biocontrol agents against NAHL-emitting plant pathogens, and bioremediation agents in contaminated waters and soils. Here, we used the PacBio technology to resolve the complete genome sequence of the biocontrol strain R. erythropolis R138. Its genome consisted in a circular chromosome (6,236,862 bp), a linear plasmid pLRE138 (477,915 bp) and a circular plasmid pCRE138 (91,729 bp). In addition, draft genomes of five R. erythropolis strains were determined by Illumina technology and compared with the other five R. erythropolis genomes that are available in public databases: 5,825 common CDSs were present in all of the eleven analyzed genomes and represented up to 87 % of those identified in R. erythropolis R138. This study highlighted the high proportion of core-genome genes in R. erythropolis, but a high variability of the plasmid content. Key-metabolic pathways which are involved in the degradation of complex molecules, such as NAHLs and phenol, catechol and sterol derivatives are coded by the R. erythropolis core-genome.
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Affiliation(s)
- Anthony Kwasiborski
- Institut for Integrative Biology of the Cell, I2BC, Université Paris Saclay, Saclay Plant Sciences, UMR9198 CNRS CEA Université Paris-Sud, Avenue de la Terrasse, 91198, Gif-sur-Yvette Cedex, France
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Mikolasch A, Omirbekova A, Schumann P, Reinhard A, Sheikhany H, Berzhanova R, Mukasheva T, Schauer F. Enrichment of aliphatic, alicyclic and aromatic acids by oil-degrading bacteria isolated from the rhizosphere of plants growing in oil-contaminated soil from Kazakhstan. Appl Microbiol Biotechnol 2015; 99:4071-84. [PMID: 25592733 DOI: 10.1007/s00253-014-6320-4] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2014] [Revised: 12/09/2014] [Accepted: 12/12/2014] [Indexed: 10/24/2022]
Abstract
Three microbial strains were isolated from the rhizosphere of alfalfa (Medicago sativa), grass mixture (Festuca rubra, 75 %; Lolium perenne, 20 %; Poa pratensis, 10 %), and rape (Brassica napus) on the basis of their high capacity to use crude oil as the sole carbon and energy source. These isolates used an unusually wide spectrum of hydrocarbons as substrates (more than 80), including n-alkanes with chain lengths ranging from C12 to C32, monomethyl- and monoethyl-substituted alkanes (C12-C23), n-alkylcyclo alkanes with alkyl chain lengths from 4 to 18 carbon atoms, as well as substituted monoaromatic and diaromatic hydrocarbons. These three strains were identified as Gordonia rubripertincta and Rhodococcus sp. SBUG 1968. During their transformation of this wide range of hydrocarbon substrates, a very large number of aliphatic, alicyclic, and aromatic acids was detected, 44 of them were identified by GC/MS analyses, and 4 of them are described as metabolites for the first time. Inoculation of plant seeds with these highly potent bacteria had a beneficial effect on shoot and root development of plants which were grown on oil-contaminated sand.
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Affiliation(s)
- Annett Mikolasch
- Department of Applied Microbiology, Institute of Microbiology, University Greifswald, Friedrich-Ludwig-Jahn-Str. 15, 17487, Greifswald, Germany,
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Transcriptome of the quorum-sensing signal-degrading Rhodococcus erythropolis responds differentially to virulent and avirulent Pectobacterium atrosepticum. Heredity (Edinb) 2015; 114:476-84. [PMID: 25585922 DOI: 10.1038/hdy.2014.121] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2014] [Revised: 11/19/2014] [Accepted: 12/03/2014] [Indexed: 01/07/2023] Open
Abstract
Social bacteria use chemical communication to coordinate and synchronize gene expression via the quorum-sensing (QS) regulatory pathway. In Pectobacterium, a causative agent of the blackleg and soft-rot diseases on potato plants and tubers, expression of the virulence factors is collectively controlled by the QS-signals N-acylhomoserine lactones (NAHLs). Several soil bacteria, such as the actinobacterium Rhodococcus erythropolis, are able to degrade NAHLs, hence quench the chemical communication and virulence of Pectobacterium. Here, next-generation sequencing was used to investigate structural and functional genomics of the NAHL-degrading R. erythropolis strain R138. The R. erythropolis R138 genome (6.7 Mbp) contained a single circular chromosome, one linear (250 kbp) and one circular (84 kbp) plasmid. Growth of R. erythropolis and P. atrosepticum was not altered in mixed-cultures as compared with monocultures on potato tuber slices. HiSeq-transcriptomics revealed that no R. erythropolis genes were differentially expressed when R. erythropolis was cultivated in the presence vs absence of the avirulent P. atrosepticum mutant expI, which is defective for QS-signal synthesis. By contrast 50 genes (<1% of the R. erythropolis genome) were differentially expressed when R. erythropolis was cultivated in the presence vs absence of the NAHL-producing virulent P. atrosepticum. Among them, quantitative real-time reverse-transcriptase-PCR confirmed that the expression of some alkyl-sulfatase genes decreased in the presence of a virulent P. atrosepticum, as well as deprivation of organic sulfur such as methionine, which is a key precursor in the synthesis of NAHL by P. atrosepticum.
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Fetzner S. Quorum quenching enzymes. J Biotechnol 2014; 201:2-14. [PMID: 25220028 DOI: 10.1016/j.jbiotec.2014.09.001] [Citation(s) in RCA: 200] [Impact Index Per Article: 20.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2014] [Revised: 08/29/2014] [Accepted: 09/04/2014] [Indexed: 01/12/2023]
Abstract
Bacteria use cell-to-cell communication systems based on chemical signal molecules to coordinate their behavior within the population. These quorum sensing systems are potential targets for antivirulence therapies, because many bacterial pathogens control the expression of virulence factors via quorum sensing networks. Since biofilm maturation is also usually influenced by quorum sensing, quenching these systems may contribute to combat biofouling. One possibility to interfere with quorum sensing is signal inactivation by enzymatic degradation or modification. Such quorum quenching enzymes are wide-spread in the bacterial world and have also been found in eukaryotes. Lactonases and acylases that hydrolyze N-acyl homoserine lactone (AHL) signaling molecules have been investigated most intensively, however, different oxidoreductases active toward AHLs or 2-alkyl-4(1H)-quinolone signals as well as other signal-converting enzymes have been described. Several approaches have been assessed which aim at alleviating virulence, or biofilm formation, by reducing the signal concentration in the bacterial environment. These involve the application or stimulation of signal-degrading bacteria as biocontrol agents in the protection of crop plants against soft-rot disease, the use of signal-degrading bacteria as probiotics in aquaculture, and the immobilization or entrapment of quorum quenching enzymes or bacteria to control biofouling in membrane bioreactors. While most approaches to use quorum quenching as antivirulence strategy are still in the research phase, the growing number of organisms and enzymes known to interfere with quorum sensing opens up new perspectives for the development of innovative antibacterial strategies.
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Affiliation(s)
- Susanne Fetzner
- Institute of Molecular Microbiology and Biotechnology, University of Muenster, Corrensstrasse 3, D-48149 Muenster, Germany.
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36
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Genome Sequence of the Quorum-Quenching Rhodococcus erythropolis Strain R138. GENOME ANNOUNCEMENTS 2014; 2:2/2/e00224-14. [PMID: 24675862 PMCID: PMC3968340 DOI: 10.1128/genomea.00224-14] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Rhodococcus erythropolis strain R138 was isolated from the rhizosphere of Solanum tuberosum and selected for its capacity to degrade N-acyl-homoserine lactones, quorum-sensing signals used as communication molecules by the potato pathogens Pectobacterium and Dickeya. Here, we report the genome sequence of Rhodococcus erythropolis strain R138.
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Christiaen SE, Matthijs N, Zhang XH, Nelis HJ, Bossier P, Coenye T. Bacteria that inhibit quorum sensing decrease biofilm formation and virulence inPseudomonas aeruginosaPAO1. Pathog Dis 2014; 70:271-9. [DOI: 10.1111/2049-632x.12124] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2013] [Revised: 12/13/2013] [Accepted: 12/17/2013] [Indexed: 11/29/2022] Open
Affiliation(s)
| | - Nele Matthijs
- Laboratory of Pharmaceutical Microbiology; Ghent University; Ghent Belgium
| | - Xiao-Hua Zhang
- College of Marine Life Sciences; Ocean University of China; Qingdao China
| | - Hans J. Nelis
- Laboratory of Pharmaceutical Microbiology; Ghent University; Ghent Belgium
| | - Peter Bossier
- Laboratory of Aquaculture & Artemia Reference Center; Ghent University; Ghent Belgium
| | - Tom Coenye
- Laboratory of Pharmaceutical Microbiology; Ghent University; Ghent Belgium
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Rhodococcus erythropolis and Its γ-Lactone Catabolic Pathway: An Unusual Biocontrol System That Disrupts Pathogen Quorum Sensing Communication. AGRONOMY-BASEL 2013. [DOI: 10.3390/agronomy3040816] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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des Essarts YR, Sabbah M, Comte A, Soulère L, Queneau Y, Dessaux Y, Hélias V, Faure D. N,N'-alkylated Imidazolium-derivatives act as quorum-sensing inhibitors targeting the Pectobacterium atrosepticum-induced symptoms on potato tubers. Int J Mol Sci 2013; 14:19976-86. [PMID: 24108370 PMCID: PMC3821598 DOI: 10.3390/ijms141019976] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2013] [Revised: 09/16/2013] [Accepted: 09/17/2013] [Indexed: 11/17/2022] Open
Abstract
Bacteria belonging to the Pectobacterium genus are the causative agents of the blackleg and soft-rot diseases that affect potato plants and tubers worldwide. In Pectobacterium, the expression of the virulence genes is controlled by quorum-sensing (QS) and N-acylhomoserine lactones (AHLs). In this work, we screened a chemical library of QS-inhibitors (QSIs) and AHL-analogs to find novel QSIs targeting the virulence of Pectobacterium. Four N,N′-bisalkylated imidazolium salts were identified as QSIs; they were active at the μM range. In potato tuber assays, two of them were able to decrease the severity of the symptoms provoked by P. atrosepticum. This work extends the range of the QSIs acting on the Pectobacterium-induced soft-rot disease.
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Affiliation(s)
- Yannick Raoul des Essarts
- Centre National de la Recherche Scientifique, Institut des Sciences du Végétal, UPR 2355, Gif-sur-Yvette 91198, France; E-Mails: (Y.R.E.); (Y.D.)
- FN3PT/RD3PT, Fédération Nationale des Producteurs de Plants de Pomme de terre, 43-45 Rue de Naples, Paris F-75008, France; E-Mail:
| | - Mohamad Sabbah
- INSA Lyon, ICBMS, UMR 5246, CNRS, Université Lyon 1, INSA-Lyon, CPE-Lyon, Bât J. Verne, 20 av A. Einstein, 69621 Villeurbanne Cedex, France; E-Mails: (M.S.); (L.S.); (Y.Q.)
| | - Arnaud Comte
- Service de Chimiothèque, ICBMS, UMR 5246, CNRS, Université Lyon 1, INSA-Lyon, CPE-Lyon, Bât Curien, 43 bd du 11 Novembre 1918, 69622 Villeurbanne Cedex, France; E-Mail:
| | - Laurent Soulère
- INSA Lyon, ICBMS, UMR 5246, CNRS, Université Lyon 1, INSA-Lyon, CPE-Lyon, Bât J. Verne, 20 av A. Einstein, 69621 Villeurbanne Cedex, France; E-Mails: (M.S.); (L.S.); (Y.Q.)
| | - Yves Queneau
- INSA Lyon, ICBMS, UMR 5246, CNRS, Université Lyon 1, INSA-Lyon, CPE-Lyon, Bât J. Verne, 20 av A. Einstein, 69621 Villeurbanne Cedex, France; E-Mails: (M.S.); (L.S.); (Y.Q.)
| | - Yves Dessaux
- Centre National de la Recherche Scientifique, Institut des Sciences du Végétal, UPR 2355, Gif-sur-Yvette 91198, France; E-Mails: (Y.R.E.); (Y.D.)
| | - Valérie Hélias
- FN3PT/RD3PT, Fédération Nationale des Producteurs de Plants de Pomme de terre, 43-45 Rue de Naples, Paris F-75008, France; E-Mail:
- Institut National de la Recherche Agronomique, UMR 1349IGEPP, Le Rheu F-35653, France
| | - Denis Faure
- Centre National de la Recherche Scientifique, Institut des Sciences du Végétal, UPR 2355, Gif-sur-Yvette 91198, France; E-Mails: (Y.R.E.); (Y.D.)
- Author to whom correspondence should be addressed; E-Mail: ; Tel.: +33-1-69-82-35-77; Fax: +33-1-69-82-36-95
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Barbey C, Crépin A, Bergeau D, Ouchiha A, Mijouin L, Taupin L, Orange N, Feuilloley M, Dufour A, Burini JF, Latour X. In Planta Biocontrol of Pectobacterium atrosepticum by Rhodococcus erythropolis Involves Silencing of Pathogen Communication by the Rhodococcal Gamma-Lactone Catabolic Pathway. PLoS One 2013; 8:e66642. [PMID: 23805254 PMCID: PMC3689677 DOI: 10.1371/journal.pone.0066642] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2013] [Accepted: 05/08/2013] [Indexed: 12/01/2022] Open
Abstract
The virulence of numerous Gram-negative bacteria is under the control of a quorum sensing process based on synthesis and perception of N-acyl homoserine lactones. Rhodococcus erythropolis, a Gram-positive bacterium, has recently been proposed as a biocontrol agent for plant protection against soft-rot bacteria, including Pectobacterium. Here, we show that the γ-lactone catabolic pathway of R. erythropolis disrupts Pectobacterium communication and prevents plant soft-rot. We report the first characterization and demonstration of N-acyl homoserine lactone quenching in planta. In particular, we describe the transcription of the R. erythropolis lactonase gene, encoding the key enzyme of this pathway, and the subsequent lactone breakdown. The role of this catabolic pathway in biocontrol activity was confirmed by deletion of the lactonase gene from R. erythropolis and also its heterologous expression in Escherichia coli. The γ-lactone catabolic pathway is induced by pathogen communication rather than by pathogen invasion. This is thus a novel and unusual biocontrol pathway, differing from those previously described as protecting plants from phytopathogens. These findings also suggest the existence of an additional pathway contributing to plant protection.
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Affiliation(s)
- Corinne Barbey
- Laboratoire de Microbiologie Signaux et Microenvironnement (LMSM EA 4312) - Normandie Université - Université de Rouen - IUT Evreux, Evreux, France
| | - Alexandre Crépin
- Laboratoire de Microbiologie Signaux et Microenvironnement (LMSM EA 4312) - Normandie Université - Université de Rouen - IUT Evreux, Evreux, France
- SIPRE Comité Nord Stations de Recherche et de Création Variétale, Bretteville du Grand Caux et Achicourt, France
| | - Dorian Bergeau
- Laboratoire de Microbiologie Signaux et Microenvironnement (LMSM EA 4312) - Normandie Université - Université de Rouen - IUT Evreux, Evreux, France
| | - Asma Ouchiha
- Laboratoire de Microbiologie Signaux et Microenvironnement (LMSM EA 4312) - Normandie Université - Université de Rouen - IUT Evreux, Evreux, France
| | - Lily Mijouin
- Laboratoire de Microbiologie Signaux et Microenvironnement (LMSM EA 4312) - Normandie Université - Université de Rouen - IUT Evreux, Evreux, France
| | - Laure Taupin
- Laboratoire de Biotechnologie et Chimie Marines - EA 3884 - Université de Bretagne-Sud, IUEM, Lorient, France
| | - Nicole Orange
- Laboratoire de Microbiologie Signaux et Microenvironnement (LMSM EA 4312) - Normandie Université - Université de Rouen - IUT Evreux, Evreux, France
| | - Marc Feuilloley
- Laboratoire de Microbiologie Signaux et Microenvironnement (LMSM EA 4312) - Normandie Université - Université de Rouen - IUT Evreux, Evreux, France
| | - Alain Dufour
- Laboratoire de Biotechnologie et Chimie Marines - EA 3884 - Université de Bretagne-Sud, IUEM, Lorient, France
| | - Jean-François Burini
- Laboratoire de Microbiologie Signaux et Microenvironnement (LMSM EA 4312) - Normandie Université - Université de Rouen - IUT Evreux, Evreux, France
| | - Xavier Latour
- Laboratoire de Microbiologie Signaux et Microenvironnement (LMSM EA 4312) - Normandie Université - Université de Rouen - IUT Evreux, Evreux, France
- * E-mail:
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Genome Sequence of the Pectobacterium atrosepticum Strain CFBP6276, Causing Blackleg and Soft Rot Diseases on Potato Plants and Tubers. GENOME ANNOUNCEMENTS 2013; 1:1/3/e00374-13. [PMID: 23788545 PMCID: PMC3707594 DOI: 10.1128/genomea.00374-13] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Pectobacterium atrosepticum strain CFBP6276 is a pectinolytic enterobacterium causing blackleg and soft rot of the stem and tuber of Solanum tuberosum. Its virulence is under the control of quorum sensing, with N-acylhomoserine lactones as communication signals. Here, we report the genome sequence of P. atrosepticum strain CFBP6276.
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Tannières M, Beury-Cirou A, Vigouroux A, Mondy S, Pellissier F, Dessaux Y, Faure D. A metagenomic study highlights phylogenetic proximity of quorum-quenching and xenobiotic-degrading amidases of the AS-family. PLoS One 2013; 8:e65473. [PMID: 23762380 PMCID: PMC3676327 DOI: 10.1371/journal.pone.0065473] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2013] [Accepted: 04/25/2013] [Indexed: 11/17/2022] Open
Abstract
Quorum-sensing (QS) signals of the N-acylhomoserine lactone (NAHL) class are cleaved by quorum-quenching enzymes, collectively named NAHLases. Here, functional metagenomics allowed the discovery of a novel bacterial NAHLase in a rhizosphere that was treated with γ-caprolactone. As revealed by rrs-DGGE and rrs-pyrosequencing, this treatment increased the percentage of the NAHL-degrading bacteria and strongly biased the structure of the bacterial community, among which Azospirillum dominated. Among the 29 760 fosmids of the metagenomic library, a single one was detected that expressed the qsdB gene conferring NAHL-degradation upon E. coli and decreased QS-regulated virulence in Pectobacterium. Phylogenetic analysis of the 34 orfs of the fosmid suggested that it would belong to an unknown Proteobacterium - probably a γ-proteobacterium. qPCR quantification of the NAHLase-encoding genes attM, qsdA, and qsdB revealed their higher abundance in the γ-caprolactone-treated rhizosphere as compared to an untreated control. The purified QsdB enzyme exhibited amidase activity. QsdB is the first amidase signature (AS) family member exhibiting NAHLase-activity. Point mutations in the AS-family catalytic triad K-S-S abolished the NAHLase activity of QsdB. This study extends the diversity of NAHLases and highlights a common phylogenic origin of AS-family enzymes involved in the degradation of natural compounds, such as NAHLs, and xenobiotics, such as nylon and linuron.
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Affiliation(s)
- Mélanie Tannières
- Institut des Sciences du Végétal, UPR2355, Centre National de la Recherche Scientifique, Gif-sur-Yvette, France
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Ghyselinck J, Velivelli SL, Heylen K, O’Herlihy E, Franco J, Rojas M, De Vos P, Prestwich BD. Bioprospecting in potato fields in the Central Andean Highlands: Screening of rhizobacteria for plant growth-promoting properties. Syst Appl Microbiol 2013; 36:116-27. [DOI: 10.1016/j.syapm.2012.11.007] [Citation(s) in RCA: 57] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2012] [Revised: 11/19/2012] [Accepted: 11/19/2012] [Indexed: 11/16/2022]
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Quorum sensing inhibitors: An overview. Biotechnol Adv 2013; 31:224-45. [DOI: 10.1016/j.biotechadv.2012.10.004] [Citation(s) in RCA: 474] [Impact Index Per Article: 43.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2012] [Revised: 09/24/2012] [Accepted: 10/30/2012] [Indexed: 12/28/2022]
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Crépin A, Beury-Cirou A, Barbey C, Farmer C, Hélias V, Burini JF, Faure D, Latour X. N-acyl homoserine lactones in diverse Pectobacterium and Dickeya plant pathogens: diversity, abundance, and involvement in virulence. SENSORS 2012; 12:3484-97. [PMID: 22737020 PMCID: PMC3376598 DOI: 10.3390/s120303484] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/15/2012] [Revised: 03/02/2012] [Accepted: 03/06/2012] [Indexed: 11/16/2022]
Abstract
Soft-rot bacteria Pectobacterium and Dickeya use N-acyl homoserine lactones (NAHSLs) as diffusible signals for coordinating quorum sensing communication. The production of NAHSLs was investigated in a set of reference strains and recently-collected isolates, which belong to six species and share the ability to infect the potato host plant. All the pathogens produced different NAHSLs, among which the 3-oxo-hexanoyl- and the 3-oxo-octanoyl-l-homoserine lactones represent at least 90% of total produced NAHSL-amounts. The level of NAHSLs varied from 0.6 to 2 pg/cfu. The involvement of NAHSLs in tuber maceration was investigated by electroporating a quorum quenching vector in each of the bacterial pathogen strains. All the NAHSL-lactonase expressing strains produced a lower amount of NAHSLs as compared to those harboring the empty vector. Moreover, all except Dickeya dadantii 3937 induced a lower level of symptoms in potato tuber assay. Noticeably, aggressiveness appeared to be independent of both nature and amount of produced signals. This work highlights that quorum sensing similarly contributed to virulence in most of the tested Pectobacterium and Dickeya, even the strains had been isolated recently or during the past decades. Thus, these key regulatory-molecules appear as credible targets for developing anti-virulence strategies against these plant pathogens.
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Affiliation(s)
- Alexandre Crépin
- Laboratoire de Microbiologie Signaux et Microenvironnement, Normandie Université, Université de Rouen EA 4312, IUT Evreux, 55 rue Saint-Germain, Evreux F-27000, France; E-Mails: (A.C.); (C.B.); (C.F.); (J.-F.B.)
- SIPRE—Comité Nord, Station de recherche et de création variétale, Bretteville du Grand Caux F-76110, France; E-Mail:
| | - Amélie Beury-Cirou
- SIPRE—Comité Nord, Station de recherche et de création variétale, Bretteville du Grand Caux F-76110, France; E-Mail:
- Institut des Sciences du Végétal, CNRS UPR2355, Avenue de la Terrasse, Gif-sur-Yvette 91198, France; E-Mail:
| | - Corinne Barbey
- Laboratoire de Microbiologie Signaux et Microenvironnement, Normandie Université, Université de Rouen EA 4312, IUT Evreux, 55 rue Saint-Germain, Evreux F-27000, France; E-Mails: (A.C.); (C.B.); (C.F.); (J.-F.B.)
| | - Christine Farmer
- Laboratoire de Microbiologie Signaux et Microenvironnement, Normandie Université, Université de Rouen EA 4312, IUT Evreux, 55 rue Saint-Germain, Evreux F-27000, France; E-Mails: (A.C.); (C.B.); (C.F.); (J.-F.B.)
| | - Valérie Hélias
- FN3PT, Fédération Nationale des Producteurs de Plants de Pomme de Terre, 43-45 rue de Naples, Paris F-75008, France; E-Mail:
- INRA, UMR 1349 IGEPP, Le Rheu Cedex F-35653, France
| | - Jean-François Burini
- Laboratoire de Microbiologie Signaux et Microenvironnement, Normandie Université, Université de Rouen EA 4312, IUT Evreux, 55 rue Saint-Germain, Evreux F-27000, France; E-Mails: (A.C.); (C.B.); (C.F.); (J.-F.B.)
| | - Denis Faure
- Institut des Sciences du Végétal, CNRS UPR2355, Avenue de la Terrasse, Gif-sur-Yvette 91198, France; E-Mail:
| | - Xavier Latour
- Laboratoire de Microbiologie Signaux et Microenvironnement, Normandie Université, Université de Rouen EA 4312, IUT Evreux, 55 rue Saint-Germain, Evreux F-27000, France; E-Mails: (A.C.); (C.B.); (C.F.); (J.-F.B.)
- Author to whom correspondence should be addressed; E-Mail: ; Tel.: +33-2-3229-1549; Fax: +33-2-3229-1550
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Barbey C, Crépin A, Cirou A, Budin-Verneuil A, Orange N, Feuilloley M, Faure D, Dessaux Y, Burini JF, Latour X. Catabolic pathway of gamma-caprolactone in the biocontrol agent Rhodococcus erythropolis. J Proteome Res 2011; 11:206-16. [PMID: 22085026 DOI: 10.1021/pr200936q] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Gamma-caprolactone (GCL) is well-known as a food flavor and has been recently described as a biostimulant molecule promoting the growth of bacteria with biocontrol activity against soft-rot pathogens. Among these biocontrol agents, Rhodococcus erythropolis, characterized by a remarkable metabolic versatility, assimilates various γ-butyrolactone molecules with a branched-aliphatic chain, such as GCL. The assimilative pathway of GCL in R. erythropolis was investigated by two-dimensional gel electrophoresis coupled to matrix-assisted laser desorption ionization (MALDI) mass spectrometry (MS) analysis. This analysis suggests the involvement of the lactonase QsdA in ring-opening, a feature confirmed by heterologous expression in Escherichia coli. According to proteome analysis, the open-chain form of GCL was degraded by β- and ω-oxidation coupled to the Krebs cycle and β-ketoadipate pathway. Ubiquity of qsdA gene among environmental R. erythropolis isolates was verified by PCR. In addition to a previous N-acyl homoserine lactone catabolic function, QsdA may therefore be involved in an intermediate degradative step of cyclic recalcitrant molecules or in synthesis of flavoring lactones.
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Affiliation(s)
- Corinne Barbey
- Laboratoire de Microbiologie Signaux et Microenvironnement, Normandie Université, EA 4312 Université de Rouen, IUT Evreux 55 rue Saint-Germain, 27000 Evreux, France
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Efficient biostimulation of native and introduced quorum-quenching Rhodococcus erythropolis populations is revealed by a combination of analytical chemistry, microbiology, and pyrosequencing. Appl Environ Microbiol 2011; 78:481-92. [PMID: 22081576 DOI: 10.1128/aem.06159-11] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Degradation of the quorum-sensing (QS) signals known as N-acylhomoserine lactones (AHL) by soil bacteria may be useful as a beneficial trait for protecting crops, such as potato plants, against the worldwide pathogen Pectobacterium. In this work, analytical chemistry and microbial and molecular approaches were combined to explore and compare biostimulation of native and introduced AHL-degrading Rhodococcus erythropolis populations in the rhizosphere of potato plants cultivated in farm greenhouses under hydroponic conditions. We first identified gamma-heptalactone (GHL) as a novel biostimulating agent that efficiently promotes plant root colonization by AHL-degrading R. erythropolis population. We also characterized an AHL-degrading biocontrol R. erythropolis isolate, R138, which was introduced in the potato rhizosphere. Moreover, root colonization by AHL-degrading bacteria receiving different combinations of GHL and R138 treatments was compared by using a cultivation-based approach (percentage of AHL-degrading bacteria), pyrosequencing of PCR-amplified rrs loci (total bacterial community), and quantitative PCR (qPCR) of the qsdA gene, which encodes an AHL lactonase in R. erythropolis. Higher densities of the AHL-degrading R. erythropolis population in the rhizosphere were observed when GHL treatment was associated with biocontrol strain R138. Under this condition, the introduced R. erythropolis population displaced the native R. erythropolis population. Finally, chemical analyses revealed that GHL, gamma-caprolactone (GCL), and their by-products, gamma-hydroxyheptanoic acid and gamma-hydroxycaproic acid, rapidly disappeared from the rhizosphere and did not accumulate in plant tissues. This integrative study highlights biostimulation as a potential innovative approach for improving root colonization by beneficial bacteria.
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D'Angelo-Picard C, Chapelle E, Ratet P, Faure D, Dessaux Y. Transgenic plants expressing the quorum quenching lactonase AttM do not significantly alter root-associated bacterial populations. Res Microbiol 2011; 162:951-8. [PMID: 21315818 DOI: 10.1016/j.resmic.2011.01.009] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2010] [Accepted: 01/03/2011] [Indexed: 10/18/2022]
Abstract
The possible impact of genetically engineered plants that degrade the quorum sensing (QS) signal of the plant pathogen Pectobacterium carotovorum was evaluated on non-target plant-associated bacterial populations and communities using Nicotiana tabacum lines expressing the lactonase AttM that degrades QS signals (AttM), and the wild type (WT) parent line. Cell densities of total culturable bacteria and those of selected populations (pseudomonads, agrobacteria) isolated from plant rhizospheres and rhizoplanes were comparable whatever the genotype of the plants (AttM or WT). Similarly, cell densities of members of the bacterial communities relying upon acyl-homoserine-lactones (AHLs) to communicate, or naturally degrading AHL signals, were identical and independent of plant genotype. Bacterial populations isolated from the two plant genotypes were also analyzed irrespective of their culturability status. DGGE analyses targeting the rrs gene (16S rRNA gene) did not reveal any significant differences within these populations. All these data indicate that bacterial population changes that could have resulted from the genetic modification of the plants are non-existent or very limited, as no changes linked to the plant genotype were observed.
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Affiliation(s)
- Cathy D'Angelo-Picard
- Institut des Sciences du Végétal, CNRS UPR 2355, Avenue de la Terrasse, 91198 Gif-sur-Yvette, France.
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Haudecoeur E, Faure D. A fine control of quorum-sensing communication in Agrobacterium tumefaciens. Commun Integr Biol 2011; 3:84-8. [PMID: 20585496 DOI: 10.4161/cib.3.2.10429] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2009] [Accepted: 10/23/2009] [Indexed: 11/19/2022] Open
Abstract
The bacterial pathogen Agrobacterium tumefaciens produces the quorum-sensing (QS) signal 3-oxo-octanoylhomoserine lactone (OC8HSL) for controlling horizontal transfer of its tumor inducing (Ti) plasmid that carries both the T-DNA and the virulence genes. Over-accumulation of OC8HSL also increases severity of plant symptoms (number of emerging tumors at infection site) by an unknown mechanism. A. tumefaciens strain C58 expresses two lactonases, AttM (BlcC) and AiiB, that cleave OC8HSL and are potential modulators of QS. Recent data highlight the direct contribution of lactonases AttM and AiiB in the control of OC8HSL level and QS-regulated functions such as conjugation of Ti plasmid and seriousness of plant symptoms. Expression of the two lactonases is regulated by different plant signals. A working model of QS in the course of the A. tumefaciens-plant host interaction is proposed and discussed.
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Affiliation(s)
- Elise Haudecoeur
- Institut des Sciences du Végétal; Centre National de la Recherche Scientifique; Gif-sur-Yvette, France
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Gamma-caprolactone stimulates growth of quorum-quenching Rhodococcus populations in a large-scale hydroponic system for culturing Solanum tuberosum. Res Microbiol 2011; 162:945-50. [PMID: 21288487 DOI: 10.1016/j.resmic.2011.01.010] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2010] [Accepted: 01/03/2011] [Indexed: 11/23/2022]
Abstract
Bacteria degrading quorum sensing (QS) signals have been proposed as biocontrol agents able to quench QS-dependent expression of virulence symptoms caused by Pectobacterium on potato plants. We report here that gamma-caprolactone (GCL) treatment stimulated growth of the native QS-degrading bacterial community in an industrial plant hydroponic system for culturing Solanum tuberosum. Post-GCL treatment, QS-degrading bacteria were mainly identified as Rhodococcus isolates, while Agrobacterium isolates dominated under similar untreated conditions. Most of the assayed Rhodococcus isolates exhibited efficient biocontrol activity for protecting potato tubers. Analytical chemistry approach revealed the rapid degradation of GCL introduced in the plant cultures.
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