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Wang W, Hu C, Chang Y, Wang L, Bi Q, Lu X, Zheng Z, Zheng X, Wu D, Niu B. Differentiated responses of the phyllosphere bacterial community of the yellowhorn tree to precipitation and temperature regimes across Northern China. FRONTIERS IN PLANT SCIENCE 2023; 14:1265362. [PMID: 37954985 PMCID: PMC10634255 DOI: 10.3389/fpls.2023.1265362] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/22/2023] [Accepted: 10/10/2023] [Indexed: 11/14/2023]
Abstract
Introduction As an ephemeral and oligotrophic environment, the phyllosphere harbors many highly diverse microorganisms. Importantly, it is known that their colonization of plant leaf surfaces is considerably influenced by a few abiotic factors related to climatic conditions. Yet how the dynamics of phyllosphere bacterial community assembly are shaped by detailed climatological elements, such as various bioclimatic variables, remains poorly understood. Methods Using high-throughput 16S rRNA gene amplicon sequencing technology, we analyzed the bacterial communities inhabiting the leaf surfaces of an oilseed tree, yellowhorn (Xanthoceras sorbifolium), grown at four sites (Yinchuan, Otogqianqi, Tongliao, and Zhangwu) whose climatic status differs in northern China. Results and Discussion We found that the yellowhorn phyllosphere's bacterial community was generally dominated by four phyla: Proteobacteria, Firmicutes, Actinobacteria, and Bacteroidetes. Nevertheless, bacterial community composition differed significantly among the four sampled site regions, indicating the possible impact of climatological factors upon the phyllosphere microbiome. Interestingly, we also noted that the α-diversities of phyllosphere microbiota showed strong positive or negative correlation with 13 bioclimatic factors (including 7 precipitation factors and 6 temperature factors). Furthermore, the relative abundances of 55 amplicon sequence variants (ASVs), including three ASVs representing two keystone taxa (the genera Curtobacterium and Streptomyces), exhibited significant yet contrary responses to the precipitation and temperature climatic variables. That pattern was consistent with all ASVs' trends of possessing opposite correlations to those two parameter classes. In addition, the total number of links and nodes, which conveys community network complexity, increased with rising values of most temperature variables. Besides that, remarkably positive relevance was found between average clustering coefficient and most precipitation variables. Altogether, these results suggest the yellowhorn phyllosphere bacterial community is capable of responding to variation in rainfall and temperature regimes in distinctive ways.
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Affiliation(s)
- Weixiong Wang
- State Key Laboratory of Tree Genetics and Breeding, Northeast Forestry University, Harbin, China
- The Center for Basic Forestry Research, College of Forestry, Northeast Forestry University, Harbin, China
- College of Life Science, Northeast Forestry University, Harbin, China
| | - Congcong Hu
- Department of Mathematics, Shanghai Normal University, Shanghai, China
| | - Yu Chang
- State Key Laboratory of Tree Genetics and Breeding, Northeast Forestry University, Harbin, China
- College of Life Science, Northeast Forestry University, Harbin, China
| | - Libing Wang
- State Key Laboratory of Tree Genetics and Breeding, Research Institute of Forestry, Chinese Academy of Forestry, Beijing, China
| | - Quanxin Bi
- State Key Laboratory of Tree Genetics and Breeding, Research Institute of Forestry, Chinese Academy of Forestry, Beijing, China
| | - Xin Lu
- Chifeng Research Institute of Forestry Science, Chifeng, China
- National Forestry and Grassland Shiny-Leaved Yellowhorn Engineering and Technology Research Center, Chifeng, China
| | - Zhimin Zheng
- State Key Laboratory of Tree Genetics and Breeding, Northeast Forestry University, Harbin, China
- The Center for Basic Forestry Research, College of Forestry, Northeast Forestry University, Harbin, China
| | - Xiaoqi Zheng
- Center for Single-Cell Omics, School of Public Health, Shanghai Jiao Tong University, School of Medicine, Shanghai, China
| | - Di Wu
- State Key Laboratory of Tree Genetics and Breeding, Northeast Forestry University, Harbin, China
- The Center for Basic Forestry Research, College of Forestry, Northeast Forestry University, Harbin, China
- College of Life Science, Northeast Forestry University, Harbin, China
| | - Ben Niu
- State Key Laboratory of Tree Genetics and Breeding, Northeast Forestry University, Harbin, China
- The Center for Basic Forestry Research, College of Forestry, Northeast Forestry University, Harbin, China
- College of Life Science, Northeast Forestry University, Harbin, China
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Dai YF, Wu XM, Wang HC, Li WH, Cai LT, Li JX, Wang F, Sehar S, Shamsi IH. Spatio-Temporal Variation in the Phyllospheric Microbial Biodiversity of Alternaria Alternata-Infected Tobacco Foliage. Front Microbiol 2022; 13:920109. [PMID: 35966692 PMCID: PMC9370072 DOI: 10.3389/fmicb.2022.920109] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2022] [Accepted: 06/22/2022] [Indexed: 11/13/2022] Open
Abstract
Phyllospheric microbial composition of tobacco (Nicotiana tabacum L.) is contingent upon certain factors, such as the growth stage of the plant, leaf position, and cultivar and its geographical location, which influence, either directly or indirectly, the growth, overall health, and production of the tobacco plant. To better understand the spatiotemporal variation of the community and the divergence of phyllospheric microflora, procured from healthy and diseased tobacco leaves infected by Alternaria alternata, the current study employed microbe culturing, high-throughput technique, and BIOLOG ECO. Microbe culturing resulted in the isolation of 153 culturable fungal isolates belonging to 33 genera and 99 bacterial isolates belonging to 15 genera. High-throughput sequencing revealed that the phyllosphere of tobacco was dominantly colonized by Ascomycota and Proteobacteria, whereas, the most abundant fungal and bacterial genera were Alternaria and Pseudomonas. The relative abundance of Alternaria increased in the upper and middle healthy groups from the first collection time to the third, whereas, the relative abundance of Pseudomonas, Sphingomonas, and Methylobacterium from the same positions increased during gradual leaf aging. Non-metric multi-dimensional scaling (NMDs) showed clustering of fungal communities in healthy samples, while bacterial communities of all diseased and healthy groups were found scattered. FUNGuild analysis, from the first collection stage to the third one in both groups, indicated an increase in the relative abundance of Pathotroph-Saprotroph, Pathotroph-Saprotroph-Symbiotroph, and Pathotroph-Symbiotroph. Inclusive of all samples, as per the PICRUSt analysis, the predominant pathway was metabolism function accounting for 50.03%. The average values of omnilog units (OUs) showed relatively higher utilization rates of carbon sources by the microbial flora of healthy leaves. According to the analysis of genus abundances, leaf growth and leaf position were the important drivers of change in structuring the microbial communities. The current findings revealed the complex ecological dynamics that occur in the phyllospheric microbial communities over the course of a spatiotemporal varying environment with the development of tobacco brown spots, highlighting the importance of community succession.
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Affiliation(s)
- Yuan-feng Dai
- Department of Plant Protection, Institute of Crop Protection, College of Agriculture, Guizhou University, Guiyang, China
- Guizhou Provincial Academician Workstation of Microbiology and Health, Guizhou Academy of Tobacco Science, Guiyang, China
- Bijie Tobacco Company, Bijie, China
| | - Xiao-mao Wu
- Department of Plant Protection, Institute of Crop Protection, College of Agriculture, Guizhou University, Guiyang, China
- *Correspondence: Xiao-mao Wu
| | - Han-cheng Wang
- Guizhou Provincial Academician Workstation of Microbiology and Health, Guizhou Academy of Tobacco Science, Guiyang, China
- Han-cheng Wang
| | - Wen-hong Li
- Guizhou Institute of Plant Protection, Guizhou Academy of Agricultural Sciences, Guiyang, China
| | - Liu-ti Cai
- Guizhou Provincial Academician Workstation of Microbiology and Health, Guizhou Academy of Tobacco Science, Guiyang, China
| | - Ji-xin Li
- Guizhou Tobacco Company of CNTC, China National Tobacco Corporation, Guiyang, China
| | - Feng Wang
- Guizhou Provincial Academician Workstation of Microbiology and Health, Guizhou Academy of Tobacco Science, Guiyang, China
- Feng Wang
| | - Shafaque Sehar
- Zhejiang Key Laboratory of Crop Germplasm Resource, Department of Agronomy, College of Agriculture and Biotechnology, Zhejiang University, Hangzhou, China
| | - Imran Haider Shamsi
- Zhejiang Key Laboratory of Crop Germplasm Resource, Department of Agronomy, College of Agriculture and Biotechnology, Zhejiang University, Hangzhou, China
- Imran Haider Shamsi
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Ding C, Zhang W, Wang Y, Ding M, Wang X, Li A, Liang D, Su X. Study on the differences of phyllosphere microorganisms between poplar hybrid offspring and their parents. PeerJ 2022; 10:e12915. [PMID: 35310169 PMCID: PMC8932310 DOI: 10.7717/peerj.12915] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2021] [Accepted: 01/20/2022] [Indexed: 01/11/2023] Open
Abstract
The females and males of dioecious plants have evolved sex-specific characteristics in terms of their morphological and physiological properties. However, the differentiation of phyllosphere microorganism of dioecious plants between parents and hybrid offspring remain largely unexplored. Here, the phyllosphere bacterial and fungal community diversity and composition of female (Populus nigra 'DH5' (PNDH5)), male (P. simonii 'DH4' (PSDH4)), and the hybrid offspring (P. simonii × P. nigra 'DH1' (PSPNDH1), P. simonii × P. nigra 'DH2' (PSPNDH2), P. simonii × P. nigra 'DH3' (PSPNDH3)) were investigated using 16S rDNA/ITS rDNA gene-based Illumina NovaSeq 6000 sequencing. There was considerable variation of plant height, diameter at breast height, leaf area, length of petioles, leaf moisture content, and starch among different samples, and PSDH2 owned the highest plant height, diameter at breast height, and length of petioles. No distinct differences of phyllosphere bacterial community diversity were observed among PSDH4, PNDH5, PSPNDH1, PSPNDH2, and PSPNDH3; while, PSPNDH2 owned the highest fungal Pielou_e index, Shannon index, and Simpson index. Firmicutes and Ascomycota were the predominant phyllosphere bacterial and fungal community at the phylum level, respectively. Bacilli and Gammaproteobacteria were the two most dominant bacterial classes regardless of parent and the hybrid offspring. The predominant phyllosphere fungal community was Dothideomycetes at the class level. The NMDS demonstrated that phyllosphere microbial community obviously differed between parents and offspring, while the phyllosphere microbial community presented some similarities under different hybrid progeny. Also, leaf characteristics contributed to the differentiation of phyllosphere bacterial and fungal communities between parents and hybrid offspring. These results highlighted the discrimination of phyllosphere microorganisms on parent and hybrid offspring, which provided clues to potential host-related species in the phyllosphere environment.
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Affiliation(s)
- Changjun Ding
- State Key Laboratory of Tree Genetics and Breeding, Research Institute of Forestry, Chinese Academy of Forestry, Beijing, China,Key Laboratory of Tree Breeding and Cultivation of State Forestry Administration, Research Institute of Forestry, Chinese Academy of Forestry, Beijing, China
| | - Weixi Zhang
- State Key Laboratory of Tree Genetics and Breeding, Research Institute of Forestry, Chinese Academy of Forestry, Beijing, China,Key Laboratory of Tree Breeding and Cultivation of State Forestry Administration, Research Institute of Forestry, Chinese Academy of Forestry, Beijing, China
| | - Yanbo Wang
- State Key Laboratory of Tree Genetics and Breeding, Research Institute of Forestry, Chinese Academy of Forestry, Beijing, China,Key Laboratory of Tree Breeding and Cultivation of State Forestry Administration, Research Institute of Forestry, Chinese Academy of Forestry, Beijing, China
| | - Mi Ding
- State Key Laboratory of Tree Genetics and Breeding, Research Institute of Forestry, Chinese Academy of Forestry, Beijing, China,Key Laboratory of Tree Breeding and Cultivation of State Forestry Administration, Research Institute of Forestry, Chinese Academy of Forestry, Beijing, China
| | - Xiaojiang Wang
- Inner Mongolia Academy of Forestry Sciences, Hohhot, Inner Mongolia, China
| | - Aiping Li
- Inner Mongolia Academy of Forestry Sciences, Hohhot, Inner Mongolia, China
| | - Dejun Liang
- Liaoning Provincial Poplar Institute, Gaizhou, Liaoning, China
| | - Xiaohua Su
- State Key Laboratory of Tree Genetics and Breeding, Research Institute of Forestry, Chinese Academy of Forestry, Beijing, China,Key Laboratory of Tree Breeding and Cultivation of State Forestry Administration, Research Institute of Forestry, Chinese Academy of Forestry, Beijing, China
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Chen X, Wicaksono WA, Berg G, Cernava T. Bacterial communities in the plant phyllosphere harbour distinct responders to a broad-spectrum pesticide. THE SCIENCE OF THE TOTAL ENVIRONMENT 2021; 751:141799. [PMID: 32889475 DOI: 10.1016/j.scitotenv.2020.141799] [Citation(s) in RCA: 34] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/22/2020] [Revised: 07/29/2020] [Accepted: 08/17/2020] [Indexed: 06/11/2023]
Abstract
Pesticide application can be accompanied by harmful non-target effects that affect humans, animals, as well as whole ecosystems. However, such effects remain mainly unaddressed in connection with microorganisms, and especially bacteria therein, which are essential for ecosystem functioning and host health. We analysed bacterial communities by sequencing 16S rRNA gene fragment amplicons following spray application of a broad-spectrum fungicide based on the active ingredient N-(3,5-dichlorophenyl) succinimide on Nicotiana tabacum L. leaves. The plant's phyllosphere was predominantly colonized by Proteobacteria, with Alphaproteobacteria accounting for up to 33.8% of the indigenous bacterial community. Bioinformatic analyses indicated that pesticide applications had an effect on the core microbiome as well as the rare microbiome. Moreover, the interference of the pesticide with phyllosphere bacteria was found to be selective. We have identified four positive responders including an ASV assigned to the genus Acinetobacter and 12 negative responders mainly assigned to bacterial genera known for beneficial plant-microbe interactions, including Stenotrophomonas, Sphingomonas, Flavobacterium and Serratia. Complementary inference of bacterial functioning on community level indicated that microbes with distinct stress response systems were likely enriched in the conducted treatments. The overall findings confirmed that pesticide treatments can induce measureable shifts in non-target bacterial communities colonizing the plant phyllosphere. They also indicate that potentially beneficial bacteria, which are known for their intrinsic association with plants, are among the most sensitive responders to the employed fungicide and thus highlight the importance of off-target studies in the context of the plant microbiome.
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Affiliation(s)
- Xiaoyulong Chen
- Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Guizhou University, 550025 Guiyang, China; College of Tobacco Science, Guizhou University, 550025 Guiyang, China; Guizhou Provincial Key Laboratory for Agricultural Pest Management of the Mountainous Region, 550025 Guiyang, China
| | - Wisnu Adi Wicaksono
- Institute of Environmental Biotechnology, Graz University of Technology, 8010 Graz, Austria.
| | - Gabriele Berg
- Institute of Environmental Biotechnology, Graz University of Technology, 8010 Graz, Austria.
| | - Tomislav Cernava
- College of Tobacco Science, Guizhou University, 550025 Guiyang, China; Guizhou Provincial Key Laboratory for Agricultural Pest Management of the Mountainous Region, 550025 Guiyang, China; Institute of Environmental Biotechnology, Graz University of Technology, 8010 Graz, Austria.
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Chen QL, Cai L, Wang HC, Cai LT, Goodwin P, Ma J, Wang F, Li Z. Fungal Composition and Diversity of the Tobacco Leaf Phyllosphere During Curing of Leaves. Front Microbiol 2020; 11:554051. [PMID: 33013785 PMCID: PMC7499341 DOI: 10.3389/fmicb.2020.554051] [Citation(s) in RCA: 29] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2020] [Accepted: 08/12/2020] [Indexed: 11/16/2022] Open
Abstract
Rhizopus oryzae causes tobacco pole rot in China during tobacco flue-curing. Flue-curing is a post-harvest process done to prepare tobacco leaves and involves three different stages: the yellowing stage has the lowest temperatures and highest humidity, then the color-fixing stage has higher temperatures and medium humidity, and finally the stem-drying stage has the highest temperatures and lowest humidity. In this study, fungal culturing and IonS5XL high-throughput sequencing techniques were used to reveal the fungal community of the petioles and lamina of tobacco leaves infected with pole rot during flue-curing. A total of 108 fungal isolates belonging to 6 genera were isolated on media. The most common fungal species isolated was the pathogen, R. oryzae, that was most often found equally on petioles and laminas in the color-fixing stage, followed by saprotrophs, mostly Aspergillus spp. High-throughput sequencing revealed saprotrophs with Alternaria being the most abundant genus, followed by Phoma, Cercospora, and Aspergillus, whereas Rhizopus was the tenth most abundant genus, which was mostly found on petioles at the yellowing stage. Both culturable fungal diversity and fungal sequence diversity was higher at stem-drying stage than the yellowing and color-fixing stages, and diversity was higher with leaf lamina than petioles revealing that the changes in fungal composition and diversity during the curing process were similar with both methods. This study demonstrates that the curing process affects the leaf microbiome of tobacco during the curing process, and future work could examine if any of these saprotrophic fungi detected during the curing of tobacco leaves may be potential biocontrol agents for with pole rot in curing chambers.
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Affiliation(s)
- Qian-Li Chen
- Key Laboratory of Molecular Genetics, Guizhou Academy of Tobacco Science, Guiyang, China
- College of Agriculture, Guizhou University, Guiyang, China
| | - Lin Cai
- College of Plant Protection, Southwest University, Chongqing, China
| | - Han-Cheng Wang
- Key Laboratory of Molecular Genetics, Guizhou Academy of Tobacco Science, Guiyang, China
| | - Liu-Ti Cai
- Key Laboratory of Molecular Genetics, Guizhou Academy of Tobacco Science, Guiyang, China
| | - Paul Goodwin
- School of Environmental Sciences, University of Guelph, Guelph, ON, Canada
| | - Jun Ma
- Qianxinan Branch of Guizhou Tobacco Company, Guiyang, China
| | - Feng Wang
- Key Laboratory of Molecular Genetics, Guizhou Academy of Tobacco Science, Guiyang, China
| | - Zhong Li
- College of Agriculture, Guizhou University, Guiyang, China
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Xueliang T, Dan X, Tingting S, Songyu Z, Ying L, Diandong W. Plant resistance and leaf chemical characteristic jointly shape phyllosphere bacterial community. World J Microbiol Biotechnol 2020; 36:139. [PMID: 32803493 DOI: 10.1007/s11274-020-02908-0] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2020] [Accepted: 07/31/2020] [Indexed: 12/18/2022]
Abstract
Phyllosphere bacteria have an important role in plant growth and resistance to pathogen infection and are partially influenced by plant genotype and leaf environment. How plant resistance to pathogens and leaf chemical characteristics shape the phyllosphere bacterial communities is unclear. In this study, the phyllosphere bacterial communities of maize hybrids with various resistance to Setosphaeria turcica were compared using the high-throughput sequencing and large-scale culturing methods. The results showed that Shannon and Simpson indices of phyllosphere bacterial communities were markedly higher in the highly resistant hybrid (HR) compared with the susceptible one. Hierarchical clustering analysis, unweighted UniFrac principal component analysis (PCoA) and the analysis of similarities (ANOSIM) demonstrated that the phyllosphere bacterial communities were significantly distinct between resistant and susceptible hybrids. The redundancy analysis (RDA) demonstrated that leaf chemical characteristics, including nitrogen and phosphorus concentration, and disease resistance play an important role in shaping the phyllosphere bacterial community. Linear discriminant effect size (LEfSe) analysis indicated that Bacillus, Pseudomonas and Tumebacillus were the biomarker species in the phyllosphere of HR. Biocontrol bacteria against S. turcica (such as Pseudomonas and Bacillus) were isolated from the phyllosphere of HR by large-scale culturing. The work contributes to understanding of the phyllosphere bacterial community assembly and provides a new clue to screening for strong biocontrol bacteria from HR and to facilitating future breeding efforts for enhancing disease resistance.
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Affiliation(s)
- Tian Xueliang
- Henan Institute of Science and Technology, Xinxiang, 453003, People's Republic of China
| | - Xu Dan
- Yangtze Normal University, Fuling, Chongqing, 408100, People's Republic of China
| | - Sun Tingting
- Henan Institute of Science and Technology, Xinxiang, 453003, People's Republic of China
| | - Zhao Songyu
- Henan Institute of Science and Technology, Xinxiang, 453003, People's Republic of China
| | - Li Ying
- Beihua University, Jilin, 132013, People's Republic of China
| | - Wang Diandong
- Yangtze Normal University, Fuling, Chongqing, 408100, People's Republic of China.
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Cheng F, Ma A, Luo J, Zhuang X, Zhuang G. N-acylhomoserine lactone-regulation of genes mediating motility and pathogenicity in Pseudomonas syringae pathovar tabaci 11528. Microbiologyopen 2017; 6:e00440. [PMID: 28133926 PMCID: PMC5458577 DOI: 10.1002/mbo3.440] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2016] [Revised: 11/28/2016] [Accepted: 12/07/2016] [Indexed: 11/11/2022] Open
Abstract
Pseudomonas syringae pathovar tabaci 11528 (P. syringae 11528) is a phytopathogen that causes wild-fire disease in soybean and tobacco plants. It utilizes a cell density-dependent regulation system known as quorum sensing (QS). In its QS system, the psyI is responsible for the biosynthesis of N-acylhomoserine lactones (AHLs). By comparing the transcripts from P. syringae 11528 wild-type strain with those of the ΔpsyI mutant using RNA sequencing (RNA-seq) technology, 1118 AHL-regulated genes were identified in the transition from exponential to stationary growth phase. Numerous AHL-regulated genes involved in pathogenicity were negatively controlled, including genes linked to flagella, chemotaxis, pilus, extracellular polysaccharides, secretion systems, and two-component system. Moreover, gene ontology and pathway enrichment analysis revealed that the most pronounced regulation was associated with bacterial motility. Finally, phenotypic assays showed that QS-regulated traits were involved in epiphytic growth of pathogens and disease development in plants. These findings imply that the AHL-mediated QS system in P. syringae 11528 plays significant roles in distinct stages of interactions between plants and pathogens, including early plant colonization and late plant infection.
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Affiliation(s)
- Feifei Cheng
- Research Center for Eco‐Environment SciencesChinese Academy of SciencesBeijingChina
- University of the Chinese Academy of SciencesBeijingChina
| | - Anzhou Ma
- Research Center for Eco‐Environment SciencesChinese Academy of SciencesBeijingChina
- University of the Chinese Academy of SciencesBeijingChina
| | - Jinxue Luo
- Research Center for Eco‐Environment SciencesChinese Academy of SciencesBeijingChina
- University of the Chinese Academy of SciencesBeijingChina
| | - Xuliang Zhuang
- Research Center for Eco‐Environment SciencesChinese Academy of SciencesBeijingChina
- University of the Chinese Academy of SciencesBeijingChina
| | - Guoqiang Zhuang
- Research Center for Eco‐Environment SciencesChinese Academy of SciencesBeijingChina
- University of the Chinese Academy of SciencesBeijingChina
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Zhou J, Bi S, Chen H, Chen T, Yang R, Li M, Fu Y, Jia AQ. Anti-Biofilm and Antivirulence Activities of Metabolites from Plectosphaerella cucumerina against Pseudomonas aeruginosa. Front Microbiol 2017; 8:769. [PMID: 28515715 PMCID: PMC5413567 DOI: 10.3389/fmicb.2017.00769] [Citation(s) in RCA: 66] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2017] [Accepted: 04/13/2017] [Indexed: 12/25/2022] Open
Abstract
This study reported the efficacy of the metabolites of Plectosphaerella cucumerina, one phyllosphere fungus from Orychophragmus violaceus, against Pseudomonas aeruginosa quorum sensing (QS) and QS-regulated biofilms. The minimum inhibitory concentration (MIC) of the ethyl acetate (EtOAc) extract from P. cucumerina against P. aeruginosa PAO1 was 1.25 mg mL−1. At sub-MIC concentrations, P. cucumerina extract (0.25–1 mg mL−1) not only inhibited biofilm formation but also disrupted preformed biofilms of P. aeruginosa PAO1 without affecting its growth. Fluorescence and scanning electron microscope (SEM) showed architectural disruption of the biofilms when treated with P. cucumerina metabolites. Further investigation demonstrated that metabolites in P. cucumerina attenuated the QS-dependent virulence factors. LC-MS/MS spectra coupled with experimentally standard samples suggested that patulin and emodin might act as the principal components possessing anti-biofilm and antivirulence activities. This is the first report of (1) the isolation of P. cucumerina from the phyllosphere of O. violaceus and (2) anti-biofilm, antivirulence, and biofilm disruption activities of this fungus. Thus, this study provides fascinating new pathways for screening antipathogenic agents.
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Affiliation(s)
- Jinwei Zhou
- School of Environmental and Biological Engineering, Nanjing University of Science and TechnologyNanjing, China
| | - Shiyuan Bi
- School of Environmental and Biological Engineering, Nanjing University of Science and TechnologyNanjing, China
| | - Hongjuan Chen
- State Key Laboratory of Pharmaceutical Biotechnology, Nanjing UniversityNanjing, China
| | - Tongtong Chen
- School of Environmental and Biological Engineering, Nanjing University of Science and TechnologyNanjing, China
| | - Rui Yang
- School of Environmental and Biological Engineering, Nanjing University of Science and TechnologyNanjing, China
| | - Minghui Li
- School of Environmental and Biological Engineering, Nanjing University of Science and TechnologyNanjing, China
| | - Yonghong Fu
- School of Environmental and Biological Engineering, Nanjing University of Science and TechnologyNanjing, China
| | - Ai-Qun Jia
- School of Environmental and Biological Engineering, Nanjing University of Science and TechnologyNanjing, China.,State Key Laboratory of Marine Resource Utilization in South China Sea, Key Laboratory of Tropical Biological Resources of Ministry Education, Hainan UniversityHaikou, China
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9
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Ren G, Ma A, Liu W, Zhuang X, Zhuang G. Bacterial signals N-acyl homoserine lactones induce the changes of morphology and ethanol tolerance in Saccharomyces cerevisiae. AMB Express 2016; 6:117. [PMID: 27873164 PMCID: PMC5118231 DOI: 10.1186/s13568-016-0292-y] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2016] [Accepted: 11/11/2016] [Indexed: 01/06/2023] Open
Abstract
The bacterial quorum sensing signals N-acyl homoserine lactone (AHL) signals are able to regulate a diverse array of physiological activities, such as symbiosis, virulence and biofilm formation, depending on population density. Recently, it has been discovered that the bacterial quorum sensing (QS) signal molecules can induce extensive response of higher eukaryotes including plants and mammalian cells. However, little is known about the response of fungi reacting to these bacterial signals. Here we showed that Saccharomyces cerevisiae, as an ancient eukaryote and widely used for alcoholic beverage and bioethanol production, exposed to short-chain 3-OC6-HSL and long-chain C12-HSL appeared obvious changes in morphology and ethanol tolerance. AHLs could increase the frequency of cells with bipolar and multipolar buds, and these changes did not present distinct differences when induced by different types (3-OC6-HSL and C12-HSL) and varied concentrations (200 nM and 2 μM) of AHLs. Further investigation by flow cytometer displayed that the cells untreated by AHLs reduced cell size (decreased FSC) and enhanced intracellular density (increased in SSC), compared with the AHLs-induced cells after incubation 6 h. In addition, the long-chain C12-HSL could slightly increase the ethanol tolerance of S. cerevisiae while the short-chain HSL obviously decreased it. Our study would be valuable to further research on the interaction between prokaryotic and eukaryotic microbes, and be reference for industrial production of bioethanol.
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Smith DL, Subramanian S, Lamont JR, Bywater-Ekegärd M. Signaling in the phytomicrobiome: breadth and potential. FRONTIERS IN PLANT SCIENCE 2015; 6:709. [PMID: 26442023 PMCID: PMC4563166 DOI: 10.3389/fpls.2015.00709] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/20/2015] [Accepted: 08/24/2015] [Indexed: 05/18/2023]
Abstract
Higher plants have evolved intimate, complex, subtle, and relatively constant relationships with a suite of microbes, the phytomicrobiome. Over the last few decades we have learned that plants and microbes can use molecular signals to communicate. This is well-established for the legume-rhizobia nitrogen-fixing symbiosis, and reasonably elucidated for mycorrhizal associations. Bacteria within the phytomircobiome communicate among themselves through quorum sensing and other mechanisms. Plants also detect materials produced by potential pathogens and activate pathogen-response systems. This intercommunication dictates aspects of plant development, architecture, and productivity. Understanding this signaling via biochemical, genomics, proteomics, and metabolomic studies has added valuable knowledge regarding development of effective, low-cost, eco-friendly crop inputs that reduce fossil fuel intense inputs. This knowledge underpins phytomicrobiome engineering: manipulating the beneficial consortia that manufacture signals/products that improve the ability of the plant-phytomicrobiome community to deal with various soil and climatic conditions, leading to enhanced overall crop plant productivity.
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Affiliation(s)
- Donald L. Smith
- Plant Science Department, McGill University/Macdonald Campus, Sainte-Anne-de-Bellevue, QCCanada
| | | | - John R. Lamont
- Plant Science Department, McGill University/Macdonald Campus, Sainte-Anne-de-Bellevue, QCCanada
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Kato T, Morohoshi T, Someya N, Ikeda T. The ppuI-rsaL-ppuR quorum-sensing system regulates cellular motility, pectate lyase activity, and virulence in potato opportunistic pathogen Pseudomonas sp. StFLB209. Biosci Biotechnol Biochem 2014; 79:673-80. [PMID: 25485871 DOI: 10.1080/09168451.2014.988679] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Abstract
Pseudomonas sp. StFLB209 was isolated from potato leaf as an N-acylhomoserine lactone (AHL)-producing bacterium and showed a close phylogenetic relationship with P. cichorii, a known plant pathogen. Although there are no reports of potato disease caused by pseudomonads in Japan, StFLB209 was pathogenic to potato leaf. In this study, we reveal the complete genome sequence of StFLB209, and show that the strain possesses a ppuI-rsaL-ppuR quorum-sensing system, the sequence of which shares a high similarity with that of Pseudomonas putida. Disruption of ppuI results in a loss of AHL production as well as remarkable reduction in motility. StFLB209 possesses strong pectate lyase activity and causes maceration on potato tuber and leaf, which was slightly reduced in the ppuI mutant. These results suggest that the quorum-sensing system is well conserved between StFLB209 and P. putida and that the system is essential for motility, full pectate lyase activity, and virulence in StFLB209.
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Affiliation(s)
- Taro Kato
- a Department of Material and Environmental Chemistry, Graduate School of Engineering , Utsunomiya University , Utsunomiya , Japan
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Hidalgo M, Prieto I, Abriouel H, Cobo A, Benomar N, Gálvez A, Martínez-Cañamero M. Effect of virgin and refined olive oil consumption on gut microbiota. Comparison to butter. Food Res Int 2014; 64:553-559. [PMID: 30011688 DOI: 10.1016/j.foodres.2014.07.030] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2014] [Revised: 07/12/2014] [Accepted: 07/20/2014] [Indexed: 12/20/2022]
Abstract
There is increasing evidence of the health benefits of olive oil consumption in the diet. Some authors have studied the effect of high fat/high calorie diets and have detected changes on the microbiota. However, these studies are mainly based on saturated fats. Here we present a study on the specific effect on gut bacterial populations of extra virgin olive oil, rich in monounsaturated fatty acids and phenolic compounds, in comparison to refined olive oil, rich in monounsaturated fatty acids but low in phenolic compounds, and to butter, rich in saturated fatty acids and cholesterol. Four groups of animals were studied: one group of mice received a standard chow diet, and the other received three high fat diets, rich in extra virgin olive oil, refined olive oil or butter. Evolution of symbiont population in feces was studied using culture-dependent and culture-independent methods. In the latter, the V3 region of 16S rDNA was amplified and separated by denaturing gradient gel electrophoresis; followed by sequencing of the most representative bands. Culture-dependent studies and comparison of the different DGGE profiles throughout the experiment demonstrated that different dietary fats had different effects on gut microbial composition. Butter-induced changes in the microbial counts resembled those previously described in obese individuals. Interestingly, a different behavior between extra virgin and refined olive oil was also observed, extra virgin olive oil being most different from butter. To our knowledge, no studies have analyzed gut microbiota depending on diets with different fatty acid saturations including different types of olive oil. This may offer new data supporting the benefits for health of extra virgin olive oil, so important in the Mediterranean diet.
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Affiliation(s)
- M Hidalgo
- Área de Microbiología, Departamento de Ciencias de la Salud, Universidad de Jaén, Spain
| | - I Prieto
- Área de Fisiología, Departamento de Ciencias de la Salud, Universidad de Jaén, Spain
| | - H Abriouel
- Área de Microbiología, Departamento de Ciencias de la Salud, Universidad de Jaén, Spain
| | - A Cobo
- Área de Microbiología, Departamento de Ciencias de la Salud, Universidad de Jaén, Spain
| | - N Benomar
- Área de Microbiología, Departamento de Ciencias de la Salud, Universidad de Jaén, Spain
| | - A Gálvez
- Área de Microbiología, Departamento de Ciencias de la Salud, Universidad de Jaén, Spain
| | - M Martínez-Cañamero
- Área de Microbiología, Departamento de Ciencias de la Salud, Universidad de Jaén, Spain.
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Deng X, Zhuang G, Ma A, Yu Q, Zhuang X. Construction of a dual fluorescence whole-cell biosensor to detect N-acyl homoserine lactones. J Environ Sci (China) 2014; 26:415-422. [PMID: 25076533 DOI: 10.1016/s1001-0742(13)60407-6] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Detection of N-acyl homoserine lactones (AHLs) is useful for understanding quorum sensing (QS) behaviors, including biofilm formation, virulence and metabolism. For detecting AHLs and indicating the host cells in situ, we constructed the plasmid pUCGMA2T(1-4) to make a dual fluorescent whole-cell biosensor based on the AhlIR AHL system of Pseudomonas syringae pv. syringae B728a. The plasmid contains three components: constitutively expressed P(npatII::gfp) for indicating host cells, P(ahlI::mcherry) that produces red fluorescence in response to AHL, and the ahlR gene that encodes an AHL regulatory protein. Meanwhile, two copies of T(1-4) (four tandem copies of a transcriptional terminator) were added into the plasmid to reduce background. The results showed that when the plasmid was placed into Escherichia coli, the dual fluorescence whole-cell biosensor was able to respond with red fluorescence within 6 hr to 5 x 10(-8)-1 x 10(-5) mol/L of 3OC6-HSL. Bright green fluorescence indicated the host cells. Furthermore, when the plasmid was transferred to wildtype Pseudomonas PhTA125 (an AHL-producing bacterium), it also showed both green and red fluorescence. This result demonstrates that this plasmid can be used to construct whole-cell indicators that can indicate the AHL response and spatial behaviors of microbes in a microenvironmental niche.
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Ma A, Lv D, Zhuang X, Zhuang G. Quorum quenching in culturable phyllosphere bacteria from tobacco. Int J Mol Sci 2013; 14:14607-19. [PMID: 23857057 PMCID: PMC3742262 DOI: 10.3390/ijms140714607] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2013] [Revised: 06/25/2013] [Accepted: 06/26/2013] [Indexed: 11/16/2022] Open
Abstract
Many Gram-negative plant pathogenic bacteria employ a N-acylhomoserine lactone (AHL)-based quorum sensing (QS) system to regulate their virulence traits. A sustainable biocontrol strategy has been developed using quorum quenching (QQ) bacteria to interfere with QS and protect plants from pathogens. Here, the prevalence and the diversity of QQ strains inhabiting tobacco leaf surfaces were explored. A total of 1177 leaf-associated isolates were screened for their ability to disrupt AHL-mediated QS, using the biosensor Chromobacterium violaceum CV026. One hundred and sixty-eight strains (14%) are capable of interfering with AHL activity. Among these, 106 strains (63%) of the culturable quenchers can enzymatically degrade AHL molecules, while the remaining strains might use other QS inhibitors to interrupt the chemical communication. Moreover, almost 79% of the QQ strains capable of inactivating AHLs enzymatically have lactonase activity. Further phylogenetic analysis based on 16S rDNA revealed that the leaf-associated QQ bacteria can be classified as Bacillus sp., Acinetobacter sp., Lysinibacillus sp., Serratia sp., Pseudomonas sp., and Myroides sp. The naturally occurring diversity of bacterial quenchers might provide opportunities to use them as effective biocontrol reagents for suppressing plant pathogen in situ.
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Affiliation(s)
- Anzhou Ma
- Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; E-Mails: (A.M.); (X.Z.)
| | - Di Lv
- Insitute of Microbiology, Chinese Academy of Sciences, Beijing 100101, China; E-Mail:
| | - Xuliang Zhuang
- Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; E-Mails: (A.M.); (X.Z.)
| | - Guoqiang Zhuang
- Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; E-Mails: (A.M.); (X.Z.)
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