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Musa Z, Ma J, Egamberdieva D, Abdelshafy Mohamad OA, Abaydulla G, Liu Y, Li WJ, Li L. Diversity and Antimicrobial Potential of Cultivable Endophytic Actinobacteria Associated With the Medicinal Plant Thymus roseus. Front Microbiol 2020; 11:191. [PMID: 32226412 PMCID: PMC7080825 DOI: 10.3389/fmicb.2020.00191] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2019] [Accepted: 01/27/2020] [Indexed: 11/30/2022] Open
Abstract
We report for the first time the isolation of endophytic actinobacteria associated with wild populations of the Chinese medicinal herb Thymus roseus Schipcz obtained from the arid land in Ili and Tacheng of the Xinjiang Province, China. Strains were isolated by special pretreatment of plant tissues and identified based on their 16S rRNA gene sequences, and their antimicrobial activities in vitro were evaluated. A total of 126 endophytic actinobacteria belonging to two classes, eight orders, 14 families, and 24 genera were isolated from different organs at the Ili and Tacheng sites. In addition, the diversity of culturable endophytic actinobacteria genera was higher at Tacheng site (n = 71, 56.35%) than the Ili site (n = 55, 43.65%). A neighbor-joining tree of 126 isolated actinobacteria showing the phylogenetic relationships based on 16S rRNA gene sequences and the genus Streptomyces was the most dominant isolate. The number of endophytic actinobacteria genera obtained from root tissues (n = 54, 42.86%) was higher compared to stem (n = 35, 27.78%) and leaf tissue (n = 37, 29.36%). Among 126 endophytic actinobacteria, 54 strains were antagonistic against at least one or more indicator organisms in vitro. Notably, most strains of Streptomyces proved antagonistic activities. For example, strain T4SB028, namely Streptomyces polyantibioticus, showed the highest inhibition ratio reached 67.06, 64.20, and 70.55% against Alternaria solani, Valsa malicola, and Valsa mali, respectively. The results demonstrate that about 30.95%, 23.01% of the tested endophytic actinobacteria were capable of producing siderophores and chitinase, respectively. Additionally, the results of the amplification of biosynthetic genes polyketide synthetase (PKS-I) and non-ribosomal peptide synthetase (NRPS) indicated that at least one antibiotic biosynthetic gene was detected in 27 (50%) of the tested strains. Our result emphasizes that the endophytic actinobacteria communities are different based on the plant tissues and the geographical environment of the sampled area. Thus, we conclude that T. roseus Schipcz. provided a rich source of endophytic actinobacteria that exhibited a broad-spectrum antimicrobial agent.
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Affiliation(s)
- Zulpiya Musa
- CAS Key Laboratory of Biogeography and Bioresource in Arid Land, Xinjiang Institute of Ecology and Geography, Ürümqi, China.,Department of Medicine, College of Kashgar Vocational Technology, Kashgar, China
| | - Jinbiao Ma
- CAS Key Laboratory of Biogeography and Bioresource in Arid Land, Xinjiang Institute of Ecology and Geography, Ürümqi, China
| | - Dilfuza Egamberdieva
- CAS Key Laboratory of Biogeography and Bioresource in Arid Land, Xinjiang Institute of Ecology and Geography, Ürümqi, China.,Faculty of Biology, National University of Uzbekistan, Tashkent, Uzbekistan
| | - Osama Abdalla Abdelshafy Mohamad
- CAS Key Laboratory of Biogeography and Bioresource in Arid Land, Xinjiang Institute of Ecology and Geography, Ürümqi, China.,Department of Environmental Protection, Faculty of Environmental Agricultural Sciences, Arish University, Arish, Egypt
| | - Gulsumay Abaydulla
- Xinjiang Laboratory of Resources Microbiology, College of Life Sciences and Technology, Xinjiang University, Ürümqi, China
| | - Yonghong Liu
- CAS Key Laboratory of Biogeography and Bioresource in Arid Land, Xinjiang Institute of Ecology and Geography, Ürümqi, China
| | - Wen-Jun Li
- CAS Key Laboratory of Biogeography and Bioresource in Arid Land, Xinjiang Institute of Ecology and Geography, Ürümqi, China.,State Key Laboratory of Biocontrol and Guangdong Provincial Key Laboratory of Plant Resources, School of Life Sciences, Sun Yat-sen University, Guangzhou, China
| | - Li Li
- CAS Key Laboratory of Biogeography and Bioresource in Arid Land, Xinjiang Institute of Ecology and Geography, Ürümqi, China
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Soussi S, Essid R, Hardouin J, Gharbi D, Elkahoui S, Tabbene O, Cosette P, Jouenne T, Limam F. Utilization of Grape Seed Flour for Antimicrobial Lipopeptide Production by Bacillus amyloliquefaciens C5 Strain. Appl Biochem Biotechnol 2019; 187:1460-1474. [PMID: 30251231 DOI: 10.1007/s12010-018-2885-1] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2018] [Accepted: 09/10/2018] [Indexed: 10/28/2022]
Abstract
An endophytic Bacillus amyloliquefaciens strain called C5, able to produce biosurfactant lipopeptides with a broad antibacterial activity spectrum, has been isolated from the roots of olive tree. Optimization of antibacterial activity was undertaken using grape seed flour (GSF) substrate at 0.02, 0.2, and 2% (w/v) in M9 medium. Strain C5 exhibited optimal growth and antimicrobial activity (MIC value of 60 μg/ml) when incubated in the presence of 0.2% GSF while lipopeptide production culminated at 2% GSF. Thin layer chromatography analysis of lipopeptide extract revealed the presence of at least three active spots at Rf 0.35, 0.59, and 0.72 at 0.2% GSF. Data were similar to those obtained in LB-rich medium. MALDI-TOF/MS analysis of lipopeptide extract obtained from 0.2% GSF substrate revealed the presence of surfactin and bacillomycin D. These results show that GSF could be used as a low-cost culture medium supplement for optimizing the production of biosurfactants by strain C5.
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Affiliation(s)
- Siwar Soussi
- Laboratory of Bioactive Substances, Center of Biotechnology of Borj Cedria, BP-901, 2050, Hammam-lif, Tunisia.,University of Carthage, Avenue de la République, BP-77, 1054, Amilcar, Tunisia
| | - Rym Essid
- Laboratory of Bioactive Substances, Center of Biotechnology of Borj Cedria, BP-901, 2050, Hammam-lif, Tunisia
| | - Julie Hardouin
- Polymers, Biopolymers, Surface Laboratory, UMR 6270 CNRS, Normandie University, Mont-Saint-Aignan, France.,Proteomic Platform PISSARO, 76821, Mont-Saint-Aignan, France
| | - Dorra Gharbi
- Laboratory of Bioactive Substances, Center of Biotechnology of Borj Cedria, BP-901, 2050, Hammam-lif, Tunisia.,University of Carthage, Avenue de la République, BP-77, 1054, Amilcar, Tunisia
| | - Salem Elkahoui
- Laboratory of Bioactive Substances, Center of Biotechnology of Borj Cedria, BP-901, 2050, Hammam-lif, Tunisia
| | - Olfa Tabbene
- Laboratory of Bioactive Substances, Center of Biotechnology of Borj Cedria, BP-901, 2050, Hammam-lif, Tunisia
| | - Pascal Cosette
- Polymers, Biopolymers, Surface Laboratory, UMR 6270 CNRS, Normandie University, Mont-Saint-Aignan, France.,Proteomic Platform PISSARO, 76821, Mont-Saint-Aignan, France
| | - Thierry Jouenne
- Polymers, Biopolymers, Surface Laboratory, UMR 6270 CNRS, Normandie University, Mont-Saint-Aignan, France.,Proteomic Platform PISSARO, 76821, Mont-Saint-Aignan, France
| | - Ferid Limam
- Laboratory of Bioactive Substances, Center of Biotechnology of Borj Cedria, BP-901, 2050, Hammam-lif, Tunisia.
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Luziatelli F, Ficca AG, Colla G, Baldassarre Švecová E, Ruzzi M. Foliar Application of Vegetal-Derived Bioactive Compounds Stimulates the Growth of Beneficial Bacteria and Enhances Microbiome Biodiversity in Lettuce. FRONTIERS IN PLANT SCIENCE 2019; 10:60. [PMID: 30804958 PMCID: PMC6370708 DOI: 10.3389/fpls.2019.00060] [Citation(s) in RCA: 41] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/29/2018] [Accepted: 01/16/2019] [Indexed: 05/02/2023]
Abstract
Many studies on plant biostimulants and organic fertilizers have been focused on the ability of these products to increase crop productivity and ameliorate crop tolerance to abiotic stresses. However, little information is available on their effect on plant microbiota, whereas it is well known that microorganisms associated with plant play crucial roles on the health and productivity of their host. The aim of this study was to evaluate the effect of a vegetal-derived protein hydrolysate (PH), a vegetal-derived PH enriched with copper (Cu-PH), and a tropical plant extract enriched with micronutrients (PE) on shoot growth and the epiphytic bacterial population of lettuce plants and the ability of these products to enhance the growth of beneficial or harmful bacteria. The three plant-derived products enhanced shoot biomass of lettuce plants indicating a biostimulant effect of the products. Data obtained using culture-independent (Terminal Restriction Fragment Length Polymorphism and Next Generation Sequencing) and culture-dependent approaches indicated that foliar application of commercial products altered the composition of the microbial population and stimulated the growth of specific bacteria belonging to Pantoea, Pseudomonas, Acinetobacter, and Bacillus genus. Data presented in this work demonstrated that some of these strains exhibited potential plant growth-promoting properties and/or biocontrol activity against fungi and bacteria phytopathogens including Fusarium, Trichoderma, and Erwinia species. No indication of potential health risks associated to the enrichment of human or plant bacterial pathogens emerged by the analysis of the microbiota of treated and no-treated plants. Overall, the findings presented in this study indicate that the commercial organic-based products can enhance the growth of beneficial bacteria occurring in the plant microbiota and signals produced by these bacteria can act synergistically with the organic compounds to enhance plant growth and productivity.
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Affiliation(s)
- Francesca Luziatelli
- Department for Innovation in Biological, Agrofood and Forest Systems, University of Tuscia, Viterbo, Italy
| | - Anna Grazia Ficca
- Department for Innovation in Biological, Agrofood and Forest Systems, University of Tuscia, Viterbo, Italy
| | - Giuseppe Colla
- Department of Agriculture and Forest Sciences, University of Tuscia, Viterbo, Italy
| | | | - Maurizio Ruzzi
- Department for Innovation in Biological, Agrofood and Forest Systems, University of Tuscia, Viterbo, Italy
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Kalai-Grami L, Karkouch I, Naili O, Slimene IB, Elkahoui S, Zekri RB, Touati I, Mnari-Hattab M, Hajlaoui MR, Limam F. Production and identification of iturin A lipopeptide from Bacillus methyltrophicus TEB1 for control of Phoma tracheiphila. J Basic Microbiol 2016; 56:864-71. [PMID: 27125201 DOI: 10.1002/jobm.201500683] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2015] [Accepted: 02/27/2016] [Indexed: 11/06/2022]
Abstract
A lipopeptide-producing endophytic Bacillus methyltrophicus TEB1 strain exhibited potent antifungal activity against Phoma tracheiphila. Lipopeptide production started at the early growth phase plateaued after 36 h of culture where it reduced the mycelium growth by 80%. The crude lipopeptide extract harvested at the stationary phase efficiently inhibited the growth of P. tracheiphila mycelium and MIC values displaying 50 and 90% inhibition of conidia germination were around 47.5 and 100 μg ml(-1) , respectively. Increasing lipopeptide extract till 3 mg ml(-1) induced 10% swelling and 3% crumbling of P. tracheiphila conidia whereas 5 mg ml(-1) induced 40% swelling and 20% crumbling. Mass spectrometry analysis of the lipopeptide extract indicated that surfactin production took place from 12 to 20 h, iturin A from 16 to 72 h, and fengycin from 12 to 72 h and that the main active compound against P. tracheiphila was identified as C15 iturin A lipopeptide. Iturin A appeared as a potential biological control agent able to substitute the currently used chemical pesticides in agriculture.
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Affiliation(s)
- Leila Kalai-Grami
- Laboratoire des Substances Bioactives, CBBC, Hammam-Lif, Tunisia.,Laboratoire de Biotechnologie Appliquée à l'Agriculture, INRA, Hedi Karray, Tunis, Tunisia
| | - Ines Karkouch
- Laboratoire des Substances Bioactives, CBBC, Hammam-Lif, Tunisia
| | - Omar Naili
- Laboratoire de Biotechnologie Appliquée à l'Agriculture, INRA, Hedi Karray, Tunis, Tunisia
| | - Imen Ben Slimene
- Laboratoire des Substances Bioactives, CBBC, Hammam-Lif, Tunisia
| | - Salem Elkahoui
- Laboratoire des Substances Bioactives, CBBC, Hammam-Lif, Tunisia
| | | | - Ines Touati
- Laboratoire des Substances Bioactives, CBBC, Hammam-Lif, Tunisia
| | - Monia Mnari-Hattab
- Laboratoire de Biotechnologie Appliquée à l'Agriculture, INRA, Hedi Karray, Tunis, Tunisia
| | - Mohamed Rabeh Hajlaoui
- Laboratoire de Biotechnologie Appliquée à l'Agriculture, INRA, Hedi Karray, Tunis, Tunisia
| | - Ferid Limam
- Laboratoire des Substances Bioactives, CBBC, Hammam-Lif, Tunisia
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Kefi A, Ben Slimene I, Karkouch I, Rihouey C, Azaeiz S, Bejaoui M, Belaid R, Cosette P, Jouenne T, Limam F. Characterization of endophytic Bacillus strains from tomato plants (Lycopersicon esculentum) displaying antifungal activity against Botrytis cinerea Pers. World J Microbiol Biotechnol 2015; 31:1967-76. [PMID: 26347324 DOI: 10.1007/s11274-015-1943-x] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2015] [Accepted: 09/03/2015] [Indexed: 11/26/2022]
Abstract
Eighty endophytic bacteria were isolated from healthy tissues of roots, stems, leaves and fruits of tomato plants (Lycopersicon esculentum). Four strains, named BL1, BT5, BR8 and BF11 were selected for their antagonism against Botrytis cinerea, a phytopathogenic fungus responsible of gray mold in several important crops, with growth inhibitory activity ranging from 27 to 53%. Morphological, biochemical, and molecular parameters as 16S rDNA sequencing demonstrated that the selected bacterial strains were related to Bacillus species which are known to produce and secrete a lot of lipopeptides with strong inhibitory effect against pathogen mycelial growth. Electrospray mass spectrometry analysis showed that these strains produced heterogeneous mixture of antibiotics belonging to fengycin and surfactin for BL1 and BT5, to iturin and surfactin for BR8, to bacillomycin D, fengycin and surfactin for BF11. Furthermore, these bacteria exhibited biocontrol potential by reducing the disease severity when tested on detached leaflets. Based on their antifungal activity against Botrytis cinerea, these strains could be used for biological control of plant diseases.
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Affiliation(s)
- Asma Kefi
- Laboratory of Bioactive Substances, Biotechnology Center of Borj-Cedria, BP 901, 2050, Hammam-Lif, Tunisia
| | - Imen Ben Slimene
- Laboratory of Bioactive Substances, Biotechnology Center of Borj-Cedria, BP 901, 2050, Hammam-Lif, Tunisia
| | - Ines Karkouch
- Laboratory of Bioactive Substances, Biotechnology Center of Borj-Cedria, BP 901, 2050, Hammam-Lif, Tunisia
| | - Christophe Rihouey
- PBS Laboratory, UMR 6270 CNRS, FR 3038, Proteomic Platform PISSARO, Institute for Research and Innovation in Biomedicine, University of Rouen, 76821, Mont-Saint-Aignan Cedex, France
| | - Sana Azaeiz
- Laboratory of Bioactive Substances, Biotechnology Center of Borj-Cedria, BP 901, 2050, Hammam-Lif, Tunisia
| | - Marwa Bejaoui
- Laboratory of Bioactive Substances, Biotechnology Center of Borj-Cedria, BP 901, 2050, Hammam-Lif, Tunisia
| | - Rania Belaid
- Laboratory of Bioactive Substances, Biotechnology Center of Borj-Cedria, BP 901, 2050, Hammam-Lif, Tunisia
| | - Pascal Cosette
- PBS Laboratory, UMR 6270 CNRS, FR 3038, Proteomic Platform PISSARO, Institute for Research and Innovation in Biomedicine, University of Rouen, 76821, Mont-Saint-Aignan Cedex, France
| | - Thierry Jouenne
- PBS Laboratory, UMR 6270 CNRS, FR 3038, Proteomic Platform PISSARO, Institute for Research and Innovation in Biomedicine, University of Rouen, 76821, Mont-Saint-Aignan Cedex, France
| | - Ferid Limam
- Laboratory of Bioactive Substances, Biotechnology Center of Borj-Cedria, BP 901, 2050, Hammam-Lif, Tunisia.
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