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Pokluda R, Ragasová LN, Jurica M, Kalisz A, Komorowska M, Niemiec M, Caruso G, Gąstoł M, Sekara A. The shaping of onion seedlings performance through substrate formulation and co-inoculation with beneficial microorganism consortia. FRONTIERS IN PLANT SCIENCE 2023; 14:1222557. [PMID: 37521928 PMCID: PMC10382143 DOI: 10.3389/fpls.2023.1222557] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 05/14/2023] [Accepted: 06/26/2023] [Indexed: 08/01/2023]
Abstract
Introduction Smart management in crop cultivation is increasingly supported by application of arbuscular mycorrhizal fungi (AMF) and plant growth-promoting microorganisms (PGPM), which sustain soil fertility and plant performance. The aim of this study was the evaluation of the effects of consortia composed of (Claroideoglomus claroideum BEG96, Claroideoglomus etunicatum BEG92, Funneliformis geosporum BEG199, Funneliformis mosseae BEG 95, and Rhizophagus irregularis BEG140) and PGPM (Azospirillum brasilense - AZ, or Saccharothrix sp. - S) on onion cultivated in growing media with a composition corresponding to a degraded soil. Methods Three types of substrate formulations were used, with peat:sand ratios of 50:50, 70:30, 100:0 (v:v). The analysis of substrate parameters crucial for its fertility (pH, salinity, sorption complex capacity, and elements' content) and characteristics reflecting onion seedlings' performance (fresh weight, stress biomarkers, and elements' content) was performed. Results AMF colonized onion roots in all treatments, showing increasing potential to form intercellular structures in the substrates rich in organic matter. Additionally, co-inoculation with PGPM microorganisms accelerated arbuscular mycorrhiza establishment. Increased antioxidant activity and glutathione peroxidase (GPOX) activity of onion roots sampled from the formulations composed of peat and sand in the ratio of 100:0, inoculated with AMF+S, and positive correlation between GPOX, fresh weight and antioxidant activity of onion roots reflected the successful induction of plant acclimatization response. Total phenols content was the highest in roots and leaves of onion grown in substrates with 70:30 peat:sand ratio, and, in the case of roots, it was correlated with AMF colonization parameters but not with antioxidant activity. Discussion AMF and PGPM efficiency in supporting onion growth should be linked to the increased onion root system capacity in mineral salts absorption, resulting in more efficient aboveground biomass production. AMF and PGPM consortia were effective in releasing minerals to soluble fraction in substrates rich in organic matter, making elements available for uptake by onion root system, though this phenomenon depended on the PGPM species. Microorganism consortia enhanced onion seedlings' performance also in substrates with lower content of organic carbon through plant biofertilization and phytostimulation.
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Affiliation(s)
- Robert Pokluda
- Department of Vegetable Sciences and Floriculture, Faculty of Horticulture, Mendel University, Brno, Czechia
| | - Lucia Nedorost Ragasová
- Department of Vegetable Sciences and Floriculture, Faculty of Horticulture, Mendel University, Brno, Czechia
| | - Miloš Jurica
- Department of Vegetable Sciences and Floriculture, Faculty of Horticulture, Mendel University, Brno, Czechia
| | - Andrzej Kalisz
- Department of Horticulture, Faculty of Biotechnology and Horticulture, University of Agriculture, Krakow, Poland
| | - Monika Komorowska
- Department of Agricultural and Environmental Chemistry, Faculty of Agriculture and Economics, University of Agriculture, Krakow, Poland
| | - Marcin Niemiec
- Department of Agricultural and Environmental Chemistry, Faculty of Agriculture and Economics, University of Agriculture, Krakow, Poland
| | - Gianluca Caruso
- Department of Agricultural Sciences, University of Naples Federico II, Naples, Italy
| | - Maciej Gąstoł
- Department of Horticulture, Faculty of Biotechnology and Horticulture, University of Agriculture, Krakow, Poland
| | - Agnieszka Sekara
- Department of Horticulture, Faculty of Biotechnology and Horticulture, University of Agriculture, Krakow, Poland
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Asif R, Siddique MH, Hayat S, Rasul I, Nadeem H, Faisal M, Waseem M, Zakki SA, Zitouni A, Muzammil S. Efficacy of Saccharothrix algeriensis NRRL B-24137 to suppress Fusarium oxysporum f.sp. vasinfectum induced wilt disease in cotton. PeerJ 2023; 11:e14754. [PMID: 36778156 PMCID: PMC9910192 DOI: 10.7717/peerj.14754] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2022] [Accepted: 12/27/2022] [Indexed: 02/08/2023] Open
Abstract
Fusarium cotton wilt is a devastating disease of the cotton crop throughout the world, caused by Fusarium oxysporum f.sp. vasinfectum (FOV). Chemical control has many side effects, so, biological controls have been widely used for the management of Fusarium wilt. This study aimed to investigate the possible use of an actinomycetes Saccharothrix algeriensis (SA) NRRL B-24137 to control FOV. To access in-vitro anti-Fusarium ability of SA NRRL B-24137, dual culture assay, spore germination and seed germination tests were carried out. Following in-vitro investigations, several pot tests in a greenhouse environment were used to evaluate the biological control potential of SA NRRL B-24137 against FOV. Dual culture assay and spore germination revealed that SA NRRL B-24137 showed significant anti-Fusarium activity.During spore germination 87.77% inhibition of spore germination were observed. In pot experiments, SA NRRL B-24137 primed cotton seeds resulted in a 74.0% reduction in disease incidence. In soil there was a significant reduction in FOV spores in the presence of SA NRRL B-24137. Positive correlation was also observed on different concentrations of SA NRRL B-24137 towards FOV reduction. The results of this study showed that SA NRRL B-24137 has the potential to be employed as a biocontrol agent against Fusarium cotton wilt, improving cotton growth characteristics and yield.
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Affiliation(s)
- Rizwan Asif
- Department of Microbiology, Government College University, Faisalabad, Pakistan,Department of Eastern Medicine and Surgery, Qarshi University Lahore, Lahore, Pakistan
| | | | - Sumreen Hayat
- Department of Microbiology, Government College University, Faisalabad, Pakistan
| | - Ijaz Rasul
- Department of Bioinformatics and Biotechnology, Government College University, Faisalabad, Pakistan
| | - Habibullah Nadeem
- Department of Bioinformatics and Biotechnology, Government College University, Faisalabad, Pakistan
| | - Muhammad Faisal
- Institute of Plant Breeding and Biotechnology, MNS-University of Agriculture, Multan, Pakistan
| | - Muhammad Waseem
- Department of Environmental Science, Government College University, Faisalabad, Pakistan
| | - Shahbaz Ahmad Zakki
- Department of Public Health and Nutrition, The University of Haripur, Haripur, Pakistan
| | - Abdelghani Zitouni
- Laboratoire de Biologie des Systèmes Microbiens (LBSM), Ecole Normale Supérieure de Kouba, Alger, Algeria
| | - Saima Muzammil
- Department of Microbiology, Government College University, Faisalabad, Pakistan
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Pokluda R, Ragasová L, Jurica M, Kalisz A, Komorowska M, Niemiec M, Sekara A. Effects of growth promoting microorganisms on tomato seedlings growing in different media conditions. PLoS One 2021; 16:e0259380. [PMID: 34731216 PMCID: PMC8565787 DOI: 10.1371/journal.pone.0259380] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2021] [Accepted: 10/18/2021] [Indexed: 11/30/2022] Open
Abstract
Plant growth-promoting microbes (PGPM) play vital roles in maintaining crop fitness and soil health in stressed environments. Research have included analysis-based cultivation of soil-microbial-plant relationships to clarify microbiota potential. The goal of the research was to (i) evaluate the symbiotic microorganism effects on tomato seedling fitness under stressed conditions simulating a fragile soil susceptible to degradation; (ii) compare the plant-microbial interactions after inoculation with microbial isolates and fungi-bacteria consortia; (iii) develop an effective crop-microbial network, which improves soil and plant status. The experimental design included non-inoculated treatments with peat and sand at ratios of 50:50, 70:30, 100:0 (v:v), inoculated treatments with arbuscular mycorrhizal fungi (AMF) and Azospirillum brasilense (AZ) using the aforementioned peat:sand ratios; and treatment with peat co-inoculated with AMF and Saccharothrix tamanrassetensis (S). AMF + AZ increased root fresh weight in peat substrate compared to the control (4.4 to 3.3 g plant–1). An increase in shoot fresh weight was detected in the AMF + AZ treatment with a 50:50 peat:sand ratio (10.1 to 8.5 g plant-1). AMF + AZ reduced antioxidant activity (DPPH) (18–34%) in leaves, whereas AMF + S had the highest DPPH in leaves and roots (45%). Total leaf phenolic content was higher in control with a decreased proportion of peat. Peroxidase activity was enhanced in AMF + AZ and AMF + S treatments, except for AMF + AZ in peat. Microscopic root assays revealed the ability of AMF to establish strong fungal-tomato symbiosis; the colonization rate was 78–89%. AMF + AZ accelerated K and Mg accumulation in tomato leaves in treatments reflecting soil stress. To date, there has been no relevant information regarding the successful AMF and Saccharothrix co-inoculation relationship. This study confirmed that AMF + S could increase the P, S, and Fe status of seedlings under high organic C content conditions. The improved tomato growth and nutrient acquisition demonstrated the potential of PGPM colonization under degraded soil conditions.
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Affiliation(s)
- Robert Pokluda
- Faculty of Horticulture, Department of Vegetable Sciences and Floriculture, Mendel University in Brno, Brno, Czech Republic
- * E-mail:
| | - Lucia Ragasová
- Faculty of Horticulture, Department of Vegetable Sciences and Floriculture, Mendel University in Brno, Brno, Czech Republic
| | - Miloš Jurica
- Faculty of Horticulture, Department of Vegetable Sciences and Floriculture, Mendel University in Brno, Brno, Czech Republic
| | - Andrzej Kalisz
- Faculty of Biotechnology and Horticulture, Department of Horticulture, University of Agriculture in Krakow, Krakow, Poland
| | - Monika Komorowska
- Faculty of Biotechnology and Horticulture, Department of Horticulture, University of Agriculture in Krakow, Krakow, Poland
| | - Marcin Niemiec
- Faculty of Agriculture and Economics, Department of Agricultural and Environmental Chemistry, University of Agriculture in Krakow, Krakow, Poland
| | - Agnieszka Sekara
- Faculty of Biotechnology and Horticulture, Department of Horticulture, University of Agriculture in Krakow, Krakow, Poland
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Merrouche R, Yekkour A, Coppel Y, Bouras N, Zitouni A, Mathieu F, Sabaou N. Saccharothrix algeriensis NRRL B-24137, the first non-Streptomyces actinobacterium, produces holomycin after cystine feeding. Arch Microbiol 2020; 202:2509-2516. [DOI: 10.1007/s00203-020-01971-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2019] [Revised: 06/28/2020] [Accepted: 06/30/2020] [Indexed: 10/23/2022]
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5
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Asif R, Siddique MH, Zakki SA, Rasool MH, Waseem M, Hayat S, Muzammil S. Saccharothrix Algeriensis NRRL B-24137 Potentiates Chemical Fungicide Carbendazim in Treating Fusarium Oxysporum f.sp. Vasinfectum-Induced Cotton Wilt Disease. Dose Response 2020; 18:1559325820960346. [PMID: 32994756 PMCID: PMC7503036 DOI: 10.1177/1559325820960346] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2020] [Revised: 05/21/2020] [Accepted: 05/27/2020] [Indexed: 11/16/2022] Open
Abstract
Cotton (Gossypium hirsutum) wilt is one of the destructive disease caused by Fusarium oxysporum f. sp. vasinfectum and lead to 100% yield loss under favorable conditions. This study aims to estimate the potential of biological control agents Saccharothrix algeriensis NRRL B-24137 (SA) and chemical fungicides against cotton wilt pathogen under in-vitro and in-vivo conditions. The in-vitro study revealed that carbendazim showed maximum mycelia growth inhibition with a mean of 91% over control, which was further validated in glasshouse assay. In-vitro dual culture test of biocontrol agents with F. oxysporum determined that SA had a potential to inhibit mycelia growth by 68% compared to control. Further in glasshouse assay, the combination of the SA and carbendazim (10 µg/mL) showed a significant (p < 0.05) disease control. Moreover, results demonstrated that carbendazim and SA remarkably decreased the disease development up to 83% and subsequently, significant improvement was observed in the plant growth parameters (plant length, root length, and plant weight) compared to untreated plants. Conclusively, exploration and utilization of bioagent for fungal diseases in cotton may provide a better line with maximum efficacy and with lesser adverse effects, which will pave a way toward better consequences in fungal treatments.
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Affiliation(s)
- Rizwan Asif
- Department of Microbiology, Government College University Faisalabad, Faisalabad, Pakistan
| | - Muhammad Hussnain Siddique
- Department of Bioinformatics & Biotechnology, Government College University Faisalabad, Faisalabad, Pakistan
| | - Shahbaz Ahmad Zakki
- Department of Public Health, The University of Haripur, Haripur, KP, Pakistan
| | | | - Muhammad Waseem
- Department of Microbiology, Government College University Faisalabad, Faisalabad, Pakistan
| | - Sumreen Hayat
- Department of Microbiology, Government College University Faisalabad, Faisalabad, Pakistan.,Department of Biotechnology, University of Sargodha, Sargodha, Pakistan
| | - Saima Muzammil
- Department of Microbiology, Government College University Faisalabad, Faisalabad, Pakistan
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Actinobacteria Associated with Vineyard Soils of Algeria: Classification, Antifungal Potential Against Grapevine Trunk Pathogens and Plant Growth-Promoting Features. Curr Microbiol 2020; 77:2831-2840. [PMID: 32594221 DOI: 10.1007/s00284-020-02097-x] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2020] [Accepted: 06/18/2020] [Indexed: 12/16/2022]
Abstract
Grapevine trunk diseases (GTDs) are among the most destructive diseases of vineyards worldwide, including Algeria. In the fungal complex involved in GTD symptoms, referred as grapevine trunk-pathogens, Paeomoniella chlamydospora and Phaeoacremonium minimum have a determining infecting role as pioneer fungi. Due to the lack of efficiency of conventional disease management practices, a search for alternative strategies, such as biocontrol, is needed. Taking the approach of looking for biocontrol candidates in the environment surrounding the plant, the present study explored actinobacteria diversity within vineyard soils of six grape-producing regions in Algeria. Based on their 16S rRNA gene sequence, identification and phylogenic analysis were performed on the 40 isolates of actinobacteria obtained. Forty percent of strains were attached to Streptomyces, including two evidenced new species, and 32.5% were affiliated to Saccharothrix. The other less represented genera were Actinoplanes, Nocardia, Nocardiopsis, Lentzea, Nonomuraea, Promicromonospora, Saccharopolyspora and Streptosporangium. Screening based on antagonistic and plant growth promotion (PGP) abilities of the strains showed that 47.5% of the isolates exhibited appreciable antagonistic activities against both Pa. chlamydospora and Pm. minimum, with the two best strains being Streptomyces sp. Ms18 and Streptomyces sp. Sb11. Screening for plant growth promoting properties demonstrated that majority of the strains were able to produce indole acetic acid, siderophores, ammonia, ACC deaminase, cellulase and amylase, and fix N2. Through a PGP-traits-based cluster analysis, the most interesting strains were highlighted. Taking into account both antagonistic and PGP properties, Streptomyces sp Sb11 was selected as the most promising candidate for further evaluations of its efficiency in a GTDs context.
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Djinni I, Defant A, Kecha M, Mancini I. Actinobacteria Derived from Algerian Ecosystems as a Prominent Source of Antimicrobial Molecules. Antibiotics (Basel) 2019; 8:E172. [PMID: 31581466 PMCID: PMC6963827 DOI: 10.3390/antibiotics8040172] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2019] [Revised: 09/25/2019] [Accepted: 09/25/2019] [Indexed: 01/19/2023] Open
Abstract
Actinobacteria, in particular "rare actinobacteria" isolated from extreme ecosystems, remain the most inexhaustible source of novel antimicrobials, offering a chance to discover new bioactive metabolites. This is the first overview on actinobacteria isolated in Algeria since 2002 to date with the aim to present their potential in producing bioactive secondary metabolites. Twenty-nine new species and one novel genus have been isolated, mainly from the Saharan soil and palm groves, where 37.93% of the most abundant genera belong to Saccharothrix and Actinopolyspora. Several of these strains were found to produce antibiotics and antifungal metabolites, including 17 new molecules among the 50 structures reported, and some of these antibacterial metabolites have shown interesting antitumor activities. A series of approaches used to enhance the production of bioactive compounds is also presented as the manipulation of culture media by both classical methods and modeling designs through statistical strategies and the associations with diverse organisms and strains. Focusing on the Algerian natural sources of antimicrobial metabolites, this work is a representative example of the potential of a closely combined study on biology and chemistry of natural products.
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Affiliation(s)
- Ibtissem Djinni
- Laboratoire de Microbiologie Appliquée, Faculté des Sciences de la Nature et de la Vie, Université de Bejaia 06000, Algeria.
- Bioorganic Chemistry Laboratory, Department of Physics, University of Trento, Trento 38123, Italy.
| | - Andrea Defant
- Bioorganic Chemistry Laboratory, Department of Physics, University of Trento, Trento 38123, Italy.
| | - Mouloud Kecha
- Laboratoire de Microbiologie Appliquée, Faculté des Sciences de la Nature et de la Vie, Université de Bejaia 06000, Algeria.
| | - Ines Mancini
- Bioorganic Chemistry Laboratory, Department of Physics, University of Trento, Trento 38123, Italy.
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Merrouche R, Yekkour A, Coppel Y, Bouras N, Zitouni A, Lebrihi A, Mathieu F, Sabaou N. A new dithiolopyrrolone antibiotic triggered by a long fermentation of Saccharothrix algeriensis NRRL B-24137 in sorbic acid-amended medium. Lett Appl Microbiol 2019; 69:294-301. [PMID: 31424588 DOI: 10.1111/lam.13207] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2019] [Revised: 08/09/2019] [Accepted: 08/09/2019] [Indexed: 11/28/2022]
Abstract
Saccharothrix algeriensis NRRL B-24137 is an actinobacterium isolated from Algerian Saharan soil. It produces bioactive compounds belonging to the dithiolopyrrolone class of antibiotics, which are characterized by the possession of a unique pyrrolinonodithiole nucleus. Dithiolopyrrolones are known for their strong antibacterial and antifungal activities. This class of antibiotics generated great interest after the discovery of their anticancer properties. In this study, an antibiotic named PR11, produced after a long bacterial fermentation (11 days) in sorbic acid-containing culture broth, was characterized as a new dithiolopyrrolone derivative. After HPLC analysis and purification, the chemical structure of this antibiotic was determined by 1 H- and 13 C-nuclear magnetic resonance, mass and UV-visible data. PR11 was thus characterized as an iso-hexanoyl-pyrrothine, a novel dithiolopyrrolone derivative. The minimum inhibitory concentrations of the new induced antibiotic were determined against several pathogenic micro-organisms. A moderate to strong activity was noted against all Gram-positive bacteria, filamentous fungi and yeasts tested. SIGNIFICANCE AND IMPACT OF THE STUDY: Given the strong activities of dithiolopyrrolones against diverse prokaryotic and eukaryotic micro-organisms including potent selective-anticancer activity, the discovery of new-related derivatives draw continuous attention for therapeutic research. Depending on nature and concentration of added precursor, Saccharothrix algeriensis NRRL B-24137 produce several dithiolopyrrolone coumpounds. In this study, sorbic acid addition combined to long fermentation duration was shown to induce the biosynthesis of a novel dithiolopyrrolone derivative. After purification and full spectroscopic and spectrometric study, the compound was characterized as iso-hexanoyl-pyrrothine. In the future investigation for novel dithiolopyrrolone discovery, fermentation duration should be regarded as a key parameter as well.
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Affiliation(s)
- R Merrouche
- Laboratoire de Biologie des Systèmes Microbiens, Ecole Normale Supérieure de Kouba, Alger, Algeria
| | - A Yekkour
- Laboratoire de Biologie des Systèmes Microbiens, Ecole Normale Supérieure de Kouba, Alger, Algeria.,Institut National de Recherche Agronomique d'Algérie, Alger, Algeria
| | - Y Coppel
- Laboratoire de Chimie de Coordination, CNRS, Université de Toulouse, UPS, INPT, Toulouse, France
| | - N Bouras
- Laboratoire de Biologie des Systèmes Microbiens, Ecole Normale Supérieure de Kouba, Alger, Algeria.,Département de Biologie, Faculté des Sciences de la Nature et de la Vie et Sciences de la Terre, Université de Ghardaïa, Ghardaïa, Algeria
| | - A Zitouni
- Laboratoire de Biologie des Systèmes Microbiens, Ecole Normale Supérieure de Kouba, Alger, Algeria
| | - A Lebrihi
- Laboratoire de Génie Chimique, Université de Toulouse, CNRS, Toulouse, France
| | - F Mathieu
- Laboratoire de Génie Chimique, Université de Toulouse, CNRS, Toulouse, France
| | - N Sabaou
- Laboratoire de Biologie des Systèmes Microbiens, Ecole Normale Supérieure de Kouba, Alger, Algeria
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Hamdar A, El Hage S, El Garah F, Baziard G, Roques C, Lajoie B. Yield enhancement strategy of dithiolopyrrolone from Saccharothrix algeriensis by aliphatic alcohols supplementation. Process Biochem 2019. [DOI: 10.1016/j.procbio.2018.11.011] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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10
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Merrouche R, Yekkour A, Coppel Y, Bouras N, Lamari L, Zitouni A, Mathieu F, Lebrihi A, Sabaou N. Effective biosynthesis of benzoyl-pyrrothine dithiolopyrrolone antibiotic by cinnamic acid-precursor addition in culture of Saccharothrix algeriensis NRRL B-24137. Lett Appl Microbiol 2019; 68:165-172. [PMID: 30480824 DOI: 10.1111/lam.13101] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2018] [Revised: 11/15/2018] [Accepted: 11/16/2018] [Indexed: 11/30/2022]
Abstract
Dithiolopyrrolone antibiotics, produced by several micro-organisms, are known for their strong antimicrobial and antitumor activities. Among of this micro-organisms, Saccharothrix algeriensis NRRL B-24137, a rare actinobacterium, has the ability to produce several dithiolopyrrolones derivatives depending on precursors added in the culture medium. After 10 days of strain fermentation on semi-synthetic medium supplemented with cinnamic acid and HPLC purification, biosynthesis of benzoyl-pyrrothine dithiolopyrrolone was evidenced through complete spectroscopic (UV-visible and 1H and 13C NMR) and spectrometric (electron impact mass spectrum) analyses. The pure molecule showed appreciable minimum inhibitory concentration values against several Gram-positive bacteria and filamentous fungi. SIGNIFICANCE AND IMPACT OF THE STUDY: Dithiolopyrrolone antibiotics, known for their strong antimicrobial activities, gained greater interest after the discovery of their antitumor properties. Depending on precursors added, Saccharothrix algeriensis NRRL B-24137 has the ability to produce several dithiolopyrrolones derivatives. Since biological activities of dithiolopyrrolones are related to their variable structure, discover of new natural analogues to be therapeutically explored remains a significant framework of research. In this study, a new dithiolopyrrolone derivative was purified from the fermentation broth of S. algeriensis NRRL B-24137. This new antibiotic, characterized as benzoyl-pyrrothine dithiolopyrrolone, was induced by adding cinnamic acid, as precursor, to a semi-synthetic medium.
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Affiliation(s)
- R Merrouche
- Laboratoire de Biologie des Systèmes Microbiens, Ecole Normale Supérieure de Kouba, Alger, Algeria
| | - A Yekkour
- Laboratoire de Biologie des Systèmes Microbiens, Ecole Normale Supérieure de Kouba, Alger, Algeria.,Institut National de Recherche Agronomique d'Algérie, Station Mehdi Boualem Baraki, Alger, Algeria
| | - Y Coppel
- Laboratoire de Chimie de Coordination, CNRS, Université de Toulouse, UPS, INPT, Toulouse, France
| | - N Bouras
- Laboratoire de Biologie des Systèmes Microbiens, Ecole Normale Supérieure de Kouba, Alger, Algeria.,Département de Biologie, Faculté des Sciences de la Nature et de la Vie et Sciences de la Terre, Université de Ghardaïa, Ghardaïa, Algeria
| | - L Lamari
- Laboratoire de Biologie des Systèmes Microbiens, Ecole Normale Supérieure de Kouba, Alger, Algeria
| | - A Zitouni
- Laboratoire de Biologie des Systèmes Microbiens, Ecole Normale Supérieure de Kouba, Alger, Algeria
| | - F Mathieu
- Laboratoire de Génie Chimique, Université de Toulouse, CNRS, Toulouse, France
| | - A Lebrihi
- Laboratoire de Génie Chimique, Université de Toulouse, CNRS, Toulouse, France
| | - N Sabaou
- Laboratoire de Biologie des Systèmes Microbiens, Ecole Normale Supérieure de Kouba, Alger, Algeria
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Actinomycetes: an unexplored microorganisms for plant growth promotion and biocontrol in vegetable crops. World J Microbiol Biotechnol 2018; 34:132. [PMID: 30105532 DOI: 10.1007/s11274-018-2517-5] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2018] [Accepted: 08/09/2018] [Indexed: 12/24/2022]
Abstract
Actinomycetes, a Gram positive bacteria, well reported as a source of antibiotics, also possess potential to control various plant pathogens, besides acting as plant growth promoting agent. Chemicals in different forms are extensively being used in vegetable farming, adversely affecting the environment and consumer health. Microbial agent like actinomycetes can substantially replace these harmful chemicals, and have now started finding a place as an important input in to farming practices. Only selected vegetable crops belonging to 11 different families have been explored with use of actinomycetes as biocontrol and plant growth promoting agent till now. It provides ample opportunities to vegetable researchers, to further explore with use of this very important group of microorganisms, in order to achieve even higher production level of safe vegetables. Mycostop and Actinovate are two actinomycetes based formulations globally available for use in vegetable farming as a substitute for chemical formulations. Present review article has summarized the literature available on use of actinomycetes in vegetable farming. Existing wide gap in knowledge, and potential thrust areas for future research have also been projected.
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