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Majewska M, Słomka A, Hanaka A. Siderophore-producing bacteria from Spitsbergen soils-novel agents assisted in bioremediation of the metal-polluted soils. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2024; 31:32371-32381. [PMID: 38652189 PMCID: PMC11133149 DOI: 10.1007/s11356-024-33356-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/30/2023] [Accepted: 04/12/2024] [Indexed: 04/25/2024]
Abstract
Siderophores are molecules that exhibit a high specificity for iron (Fe), and their synthesis is induced by a deficiency of bioavailable Fe. Complexes of Fe-siderophore are formed extracellularly and diffuse through porins across membranes into bacterial cells. Siderophores can bind heavy metals facilitating their influx into cells via the same mechanism. The aim of the studies was to determine the ability of siderophore-producing bacteria isolated from soils in the north-west part of Wedel Jarlsberg Land (Spitsbergen) to chelate non-Fe metals (Al, Cd, Co, Cu, Hg, Mn, Sn, and Zn). Specially modified blue agar plates were used, where Fe was substituted by Al, Cd, Co, Cu, Hg, Mn, Sn, or Zn in metal-chrome azurol S (CAS) complex, which retained the blue color. It has been proven that 31 out of 33 strains were capable of producing siderophores that bind to Fe, as well as other metals. Siderophores from Pantoea sp. 24 bound only Fe and Zn, and O. anthropi 55 did not produce any siderophores in pure culture. The average efficiency of Cd, Co, Cu, Mn, Sn, and Zn chelation was either comparable or higher than that of Fe, while Al and Hg showed significantly lower efficiency. Siderophores produced by S. maltophilia 54, P. luteola 27, P. luteola 46, and P. putida 49 exhibited the highest non-Fe metal chelation activity. It can be concluded that the siderophores of these bacteria may constitute an integral part of the metal bioleaching preparation, and this fact will be the subject of further research.
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Affiliation(s)
- Małgorzata Majewska
- Department of Industrial and Environmental Microbiology, Institute of Biological Sciences, Faculty of Biology and Biotechnology, Maria Curie-Skłodowska University, Akademicka 19, 20-031, Lublin, Poland.
| | - Anna Słomka
- Department of Industrial and Environmental Microbiology, Institute of Biological Sciences, Faculty of Biology and Biotechnology, Maria Curie-Skłodowska University, Akademicka 19, 20-031, Lublin, Poland
| | - Agnieszka Hanaka
- Department of Plant Physiology and Biophysics, Institute of Biological Sciences, Faculty of Biology and Biotechnology, Maria Curie-Skłodowska University, Akademicka 19, 20-031, Lublin, Poland
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2
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Isolation, screening, characterization, and optimization of bacteria isolated from calcareous soils for siderophore production. Arch Microbiol 2022; 204:721. [DOI: 10.1007/s00203-022-03322-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2022] [Revised: 10/27/2022] [Accepted: 11/01/2022] [Indexed: 11/23/2022]
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Srivastava P, Sahgal M, Sharma K, Enshasy HAE, Gafur A, Alfarraj S, Ansari MJ, Sayyed RZ. Optimization and identification of siderophores produced by Pseudomonas monteilii strain MN759447 and its antagonism toward fungi associated with mortality in Dalbergia sissoo plantation forests. FRONTIERS IN PLANT SCIENCE 2022; 13:984522. [PMID: 36438130 PMCID: PMC9696734 DOI: 10.3389/fpls.2022.984522] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/02/2022] [Accepted: 08/22/2022] [Indexed: 06/10/2023]
Abstract
Siderophore-positive bacteria present in the rhizosphere and in bulk soil assist plants by either inhibiting phytopathogen proliferation or increasing plant growth. The bacterial diversity of the Shisham forest ecosystem in the Tarai region of the Western Himalayas was studied and used for siderophore production, taking into account the large-scale dieback and wilt-induced mortality in Dalbergia sissoo (common name: shisham) plantation forests and the importance of soil microbes in tree health. In addition, Pseudomonas, Burkholderia, and Streptomyces were prominent siderophore-positive bacteria in Shisham forests. Pseudomonas species are known for their remarkable siderophore-producing ability. Bacterial siderophores inhibit pathogen growth by rapidly lowering the number of ferric ions in the rhizosphere. The Pseudomonas monteilii strain MN759447 was isolated from a D. sissoo plantation forest at the Agroforestry Research Centre, Pantnagar, Uttarakhand (28°58'N 79°25'E/28.97°N 79.41°E). It produces a significant number of siderophore units (80.36% in total). A two-stage optimization of growth factors was attempted in the strain MN759447 for better siderophore recovery. In the first-stage single-factor experiment, among the five variables studied, only pH, NH4NO3 concentration, and Fe concentration affected siderophore synthesis. In the second stage, an optimization of pH, NH4NO3 concentration, and Fe concentration for improved growth and enhanced siderophore production was carried out using a Box-Behnken design with response surface methodology. By using LC-MS, two derivatives of pseudomonine, salicylic acid, and kynurenic acid were detected as siderophores in the purified XAD-2 methanol extract of the P. monteilii strain MN759447. In addition to siderophore production, the P. monteilii strain MN759447 also exhibited a broad range of antagonistic activity against Aspergillus calidoustus (65%), Fusarium oxysporum (41.66%), Talaromyces pinophilus (65%), and Talaromyces verruculosus (65.1%) that are linked to sissoo mortality. To our knowledge, this is the first report on siderophore-producing bacteria isolated, identified, and characterized from the D. sissoo Roxb. forest habitat. This strain can also be developed as a commercial product.
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Affiliation(s)
- Pragati Srivastava
- Department of Microbiology, G. B. Pant University of Agriculture and Technology, Pantnagar, Uttarakhand, India
| | - Manvika Sahgal
- Department of Microbiology, G. B. Pant University of Agriculture and Technology, Pantnagar, Uttarakhand, India
| | - Khanchand Sharma
- Department of Agricultural Engineering, Central University of Nagaland, School of Agricultural Sciences and Rural Development, Dimapur, India
| | - Hesham Ali El Enshasy
- Institute of Bioproduct Development (IBD), UniversitiTeknologi Malaysia (UTM), Skudai, Malaysia
- School of Chemical and Energy Engineering, UniversitiTeknologi Malaysia (UTM), Skudai, Malaysia
- Institute of Bioproduct Development (IBD), City of Scientific Research and Technology Applications (SRTA), Alexandria, Egypt
| | - Abdul Gafur
- Sinarmas Forestry Corporate Research and Development, Perawang, Indonesia
| | - Saleh Alfarraj
- Zoology Department, College of Science, King Saud University, Riyadh, Saudi Arabia
| | - Mohammad Javed Ansari
- Department of Botany, Hindu College, Moradabad (Mahatma Jyotiba Phule Rohilkhand University, Bareilly), Moradabad, India
| | - R. Z. Sayyed
- Asian PGPR Society, Department of Entomology, Auburn University, Auburn, AL, United States
- Department of Microbiology, PSGVP Mandal's S. I. Patil Arts, G. B. Patel Science and STKV Sangh Commerce College, Shahada, India
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Samet M, Ghazala I, Karray F, Abid C, Chiab N, Nouri-Ellouz O, Sayadi S, Gargouri-Bouzid R. Isolation of bacterial strains from compost teas and screening of their PGPR properties on potato plants. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2022; 29:75365-75379. [PMID: 35653020 DOI: 10.1007/s11356-022-21046-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/25/2022] [Accepted: 05/19/2022] [Indexed: 06/15/2023]
Abstract
The beneficial effect of compost and compost tea on plant growth and protection is mainly associated with the microbial diversity and the presence of bacteria with plant growth-promoting effect. PGPR are considered as eco-friendly bio-fertilizers that may reduce the use of chemical pesticides and fertilizers. Three composts (AT, A10, and A30) were previously prepared from industrial wastes (olive mill wastewater, olive pomace, coffee ground, and phosphogypsum). In the present study, we isolated three bacterial strains from the compost teas. The phylogenetic identification of these bacterial strains (B.AT, B.A10, and B.A30) showed that they correspond to Serratia liquefaciens (B.AT and B.A10) and Achromobacter spanius (B.A30) species. A further characterization of the PGPR traits of these bacteria showed that they produce siderophore, exopolysaccharides, and IAA. Their effect on potato plant growth, yields, and tuber quality was performed under field culture conditions. Results showed that these strains can be characterized as PGPR, the best effect on potato plant growth was observed with Serratia liquefaciens (B.AT), the best yield and tuber quality was observed with Serratia liquefaciens (B.A10) while bacterial treatment with Achromobacter spanius (B.A30) is a Cd-tolerant PGPR.
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Affiliation(s)
- Mariem Samet
- Laboratory of Plant Improvement and Agro-Resources Valorization, National School of Engineers of Sfax, road of Soukra Km 4, B.P 1173, 3038, Sfax, Tunisia.
| | - Imen Ghazala
- Laboratory of Plant Improvement and Agro-Resources Valorization, National School of Engineers of Sfax, road of Soukra Km 4, B.P 1173, 3038, Sfax, Tunisia
| | - Fatma Karray
- Laboratory of Environmental Bioprocesses, Sfax Biotechnology Center, Road of Sidi Mansour km6, BP 1177, 3018, Sfax, Tunisia
| | - Cyrine Abid
- Laboratory of Plant Improvement and Agro-Resources Valorization, National School of Engineers of Sfax, road of Soukra Km 4, B.P 1173, 3038, Sfax, Tunisia
| | - Nour Chiab
- Laboratory of Plant Improvement and Agro-Resources Valorization, National School of Engineers of Sfax, road of Soukra Km 4, B.P 1173, 3038, Sfax, Tunisia
| | - Oumèma Nouri-Ellouz
- Laboratory of Plant Improvement and Agro-Resources Valorization, National School of Engineers of Sfax, road of Soukra Km 4, B.P 1173, 3038, Sfax, Tunisia
| | - Sami Sayadi
- Biotechnology Program, Center for Sustainable Development, College of Arts and Sciences, Qatar University, 2713, Doha, Qatar
| | - Radhia Gargouri-Bouzid
- Laboratory of Plant Improvement and Agro-Resources Valorization, National School of Engineers of Sfax, road of Soukra Km 4, B.P 1173, 3038, Sfax, Tunisia
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Khan MS, Gao J, Zhang M, Xue J, Zhang X. Pseudomonas aeruginosa Ld-08 isolated from Lilium davidii exhibits antifungal and growth-promoting properties. PLoS One 2022; 17:e0269640. [PMID: 35714148 PMCID: PMC9205524 DOI: 10.1371/journal.pone.0269640] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/01/2022] [Accepted: 05/24/2022] [Indexed: 12/24/2022] Open
Abstract
A plant growth-promoting and antifungal endophytic bacteria designated as Ld-08 isolated from the bulbs of Lilium davidii was identified as Pseudomonas aeruginosa based on phenotypic, microscopic, and 16S rRNA gene sequence analysis. Ld-08 exhibited antifungal effects against Fusarium oxysporum, Botrytis cinerea, Botryosphaeria dothidea, and Fusarium fujikuroi. Ld-08 showed the highest growth inhibition, i.e., 83.82±4.76% against B. dothidea followed by 74.12±3.87%, 67.56±3.35%, and 63.67±3.39% against F. fujikuroi, B. cinerea, and F. oxysporum, respectively. The ethyl acetate fraction of Ld-08 revealed the presence of several bioactive secondary metabolites. Prominent compounds were quinolones; 3,9-dimethoxypterocarpan; cascaroside B; dehydroabietylamine; epiandrosterone; nocodazole; oxolinic acid; pyochelin; rhodotulic acid; 9,12-octadecadienoic acid; di-peptides; tri-peptides; ursodiol, and venlafaxine. The strain Ld-08 showed organic acids, ACC deaminase, phosphate solubilization, IAA, and siderophore. The sterilized bulbs of a Lilium variety, inoculated with Ld-08, were further studied for plant growth-promoting traits. The inoculated plants showed improved growth than the control plants. Importantly, some growth parameters such as plant height, leaf length, bulb weight, and root length were significantly (P ≤0.05) increased in the inoculated plants than in the control un-inoculated plants. Further investigations are required to explore the potential of this strain to be used as a plant growth-promoting and biocontrol agent in sustainable agriculture.
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Affiliation(s)
- Mohammad Sayyar Khan
- Microbiology Division, Institute of Biotechnology and Genetic Engineering (IBGE), The University of Agriculture, Peshawar, Khyber Pakhtunkhwa, Pakistan
- Beijing Academy of Agriculture and Forestry Sciences, Beijing, China
| | - Junlian Gao
- Beijing Academy of Agriculture and Forestry Sciences, Beijing, China
| | - Mingfang Zhang
- Beijing Academy of Agriculture and Forestry Sciences, Beijing, China
| | - Jing Xue
- Beijing Academy of Agriculture and Forestry Sciences, Beijing, China
| | - Xiuhai Zhang
- Beijing Academy of Agriculture and Forestry Sciences, Beijing, China
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6
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Soares EV. Perspective on the biotechnological production of bacterial siderophores and their use. Appl Microbiol Biotechnol 2022. [PMID: 35672469 DOI: 10.1007/s00253-022-11995] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/17/2023]
Abstract
Iron (Fe) is an essential element in several fundamental cellular processes. Although present in high amounts in the Earth's crust, Fe can be a scarce element due to its low bioavailability. To mitigate Fe limitation, microorganism (bacteria and fungi) and grass plant biosynthesis and secret secondary metabolites, called siderophores, with capacity to chelate Fe(III) with high affinity and selectivity. This review focuses on the current state of knowledge concerning the production of siderophores by bacteria. The main siderophore types and corresponding siderophore-producing bacteria are summarized. A concise outline of siderophore biosynthesis, secretion and regulation is given. Important aspects to be taken into account in the selection of a siderophore-producing bacterium, such as biological safety, complexing properties of the siderophores and amount of siderophores produced are summarized and discussed. An overview containing recent scientific advances on culture medium formulation and cultural conditions that influence the production of siderophores by bacteria is critically presented. The recovery, purification and processing of siderophores are outlined. Potential applications of siderophores in different sectors including agriculture, environment, biosensors and the medical field are sketched. Finally, future trends regarding the production and use of siderophores are discussed. KEY POINTS : • An overview of siderophore production by bacteria is critically presented • Scientific advances on factors that influence siderophores production are discussed • Potential applications of siderophores, in different fields, are outlined.
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Affiliation(s)
- Eduardo V Soares
- Bioengineering Laboratory, ISEP-School of Engineering, Polytechnic Institute of Porto, rua Dr António Bernardino de Almeida, 431, 4249-015, Porto, Portugal.
- CEB-Centre of Biological Engineering, University of Minho, 4710-057, Braga, Portugal.
- LABBELS - Associate Laboratory, Braga-Guimaraes, Portugal.
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7
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Soares EV. Perspective on the biotechnological production of bacterial siderophores and their use. Appl Microbiol Biotechnol 2022; 106:3985-4004. [PMID: 35672469 DOI: 10.1007/s00253-022-11995-y] [Citation(s) in RCA: 27] [Impact Index Per Article: 13.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2022] [Revised: 05/17/2022] [Accepted: 05/18/2022] [Indexed: 11/29/2022]
Abstract
Iron (Fe) is an essential element in several fundamental cellular processes. Although present in high amounts in the Earth's crust, Fe can be a scarce element due to its low bioavailability. To mitigate Fe limitation, microorganism (bacteria and fungi) and grass plant biosynthesis and secret secondary metabolites, called siderophores, with capacity to chelate Fe(III) with high affinity and selectivity. This review focuses on the current state of knowledge concerning the production of siderophores by bacteria. The main siderophore types and corresponding siderophore-producing bacteria are summarized. A concise outline of siderophore biosynthesis, secretion and regulation is given. Important aspects to be taken into account in the selection of a siderophore-producing bacterium, such as biological safety, complexing properties of the siderophores and amount of siderophores produced are summarized and discussed. An overview containing recent scientific advances on culture medium formulation and cultural conditions that influence the production of siderophores by bacteria is critically presented. The recovery, purification and processing of siderophores are outlined. Potential applications of siderophores in different sectors including agriculture, environment, biosensors and the medical field are sketched. Finally, future trends regarding the production and use of siderophores are discussed. KEY POINTS : • An overview of siderophore production by bacteria is critically presented • Scientific advances on factors that influence siderophores production are discussed • Potential applications of siderophores, in different fields, are outlined.
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Affiliation(s)
- Eduardo V Soares
- Bioengineering Laboratory, ISEP-School of Engineering, Polytechnic Institute of Porto, rua Dr António Bernardino de Almeida, 431, 4249-015, Porto, Portugal. .,CEB-Centre of Biological Engineering, University of Minho, 4710-057, Braga, Portugal. .,LABBELS - Associate Laboratory, Braga-Guimaraes, Portugal.
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Della Mónica IF, Wong Villarreal A, Stefanoni Rubio PJ, Vaca-Paulín R, Yañez-Ocampo G. Exploring plant growth-promoting rhizobacteria as stress alleviators: a methodological insight. Arch Microbiol 2022; 204:316. [PMID: 35556177 DOI: 10.1007/s00203-022-02909-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2021] [Revised: 03/29/2022] [Accepted: 04/11/2022] [Indexed: 11/29/2022]
Abstract
Rhizospheric and root-endophyte bacteria can stimulate plant growth through diverse biochemical mechanisms and pathways, particularly under biotic and abiotic stresses. For this reason, biotechnological trends on plant growth-promoting rhizobacteria (PGPR) application as biofertilizers, bioremediators, and stress alleviators are gaining increasing interest as ecofriendly strategies for sustainable agriculture management and soil restoration. The first steps needed to implement these technologies are isolation, screening, and characterization of PGPR that can be potentially applied as bioinoculants to alleviate biotic and/or abiotic stresses. Therefore, a complete and accurate methodological study and laboratory techniques are required to warrant the correct achievement of these steps. This review compiles and details the fundamentals, methods, and procedures of key protocols used in isolation and characterization of PGPR for plant stress alleviation.
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Affiliation(s)
- Ivana F Della Mónica
- Departamento de Biodiversidad y Biología Experimental, Facultad de Ciencias Exactas y Naturales. Instituto de Micología y Botánica, Consejo Nacional de Investigaciones Científicas y Tecnológicas (INMIBO-CONICET), Universidad de Buenos Aires (UBA), Lab. 69, 4 Piso, Pabellón II, Ciudad Universitaria, Intendente Güiraldes 2160, 1428, Buenos Aires, Argentina.
| | - Arnoldo Wong Villarreal
- División Agroalimentaria, Universidad Tecnológica de la Selva, Ocosingo, 29950, Chiapas, Mexico
| | - Pablo J Stefanoni Rubio
- Departamento de Biodiversidad y Biología Experimental, Facultad de Ciencias Exactas y Naturales. Instituto de Micología y Botánica, Consejo Nacional de Investigaciones Científicas y Tecnológicas (INMIBO-CONICET), Universidad de Buenos Aires (UBA), Lab. 69, 4 Piso, Pabellón II, Ciudad Universitaria, Intendente Güiraldes 2160, 1428, Buenos Aires, Argentina
| | - Rocío Vaca-Paulín
- Laboratorio de Edafología y Ambiente, Facultad de Ciencias, Universidad Autónoma del Estado de México, 50000, Toluca, Estado de México, México
| | - Gustavo Yañez-Ocampo
- Laboratorio de Edafología y Ambiente, Facultad de Ciencias, Universidad Autónoma del Estado de México, 50000, Toluca, Estado de México, México.
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El-Sersawy MM, Hassan SED, El-Ghamry AA, El-Gwad AMA, Fouda A. Implication of plant growth-promoting rhizobacteria of Bacillus spp. as biocontrol agents against wilt disease caused by Fusarium oxysporum Schlecht. in Vicia faba L. Biomol Concepts 2021; 12:197-214. [PMID: 35041304 DOI: 10.1515/bmc-2021-0020] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2021] [Accepted: 12/20/2021] [Indexed: 12/26/2022] Open
Abstract
Out of seven Fusarium spp. isolated from infected faba bean roots, two Fusarium oxysporum were selected and showed faba bean-wilt disease severity with percentages of 68% and 47% under greenhouse conditions. The F. oxysporum showed the highest wilt disease was selected to complete the current study. Three rhizobacterial strains were isolated and identified as Bacillus velezensis Vb1, B. paramycoides Vb3, and B. paramycoides Vb6. These strains showed the highest in-vitro antagonistic activity by the dual-culture method against selected F. oxysporum with inhibition percentages of 59±0.2, 46±0.3, and 52±0.3% for Vb1, Vb3, and Vb6, respectively. These rhizobacterial strains exhibit varied activity for nitrogen-fixing and phosphate-solubilizing. Moreover, these strains showed positive results for ammonia, HCN, and siderophores production. The phytohormones production (indole-3-acetic acid, ABA, benzyl, kinten, ziaten, and GA3) and secretion of various lytic enzymes were recorded by these strains with varying degrees. Under greenhouse conditions, the rhizobacterial strains Vb1, Vb3, Vb6, and their consortium can protect faba bean from wilt caused by F. oxysporum with percentages of 70, 60, 65, and 82%, respectively. Under field conditions, the inoculation with the rhizobacterial consortium (Vb1+Vb3+Vb6) significantly increases the growth performance of the F. oxysporum-infected faba bean plant and recorded the highest wilt protection (83.3%).
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Affiliation(s)
| | - Saad El-Din Hassan
- Botany and Microbiology Department, Faculty of Science, Al-Azhar University, Cairo 11884, Egypt
| | - Abbas A El-Ghamry
- Botany and Microbiology Department, Faculty of Science, Al-Azhar University, Cairo 11884, Egypt
| | - Amr Mahmoud Abd El-Gwad
- Soil Fertility and Microbiology Department, Desert Research Center, El-Mataria, Cairo, Egypt
| | - Amr Fouda
- Botany and Microbiology Department, Faculty of Science, Al-Azhar University, Cairo 11884, Egypt
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Mahmood Ansari S, Saquib Q, De Matteis V, Awad Alwathnani H, Ali Alharbi S, Ali Al-Khedhairy A. Marine Macroalgae Display Bioreductant Efficacy for Fabricating Metallic Nanoparticles: Intra/Extracellular Mechanism and Potential Biomedical Applications. Bioinorg Chem Appl 2021; 2021:5985377. [PMID: 34873399 PMCID: PMC8643268 DOI: 10.1155/2021/5985377] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2021] [Revised: 10/26/2021] [Accepted: 11/01/2021] [Indexed: 11/17/2022] Open
Abstract
The application of hazardous chemicals during nanoparticle (NP) synthesis has raised alarming concerns pertaining to their biocompatibility and equally to the environmental harmlessness. In the recent decade, nanotechnological research has made a gigantic shift in order to include the natural resources to produce biogenic NPs. Within this approach, researchers have utilized marine resources such as macroalgae and microalgae, land plants, bacteria, fungi, yeast, actinomycetes, and viruses to synthesize NPs. Marine macroalgae (brown, red, and green) are rich in polysaccharides including alginates, fucose-containing sulfated polysaccharides (FCSPs), galactans, agars or carrageenans, semicrystalline cellulose, ulvans, and hemicelluloses. Phytochemicals are abundant in phenols, tannins, alkaloids, terpenoids, and vitamins. However, microorganisms have an abundance of active compounds ranging from sugar molecules, enzymes, canonical membrane proteins, reductase enzymes (NADH and NADPH), membrane proteins to many more. The prime reason for using the aforesaid entities in the metallic NPs synthesis is based on their intrinsic properties to act as bioreductants, having the capability to reduce and cap the metal ions into stabilized NPs. Several green NPs have been verified for their biocompatibility in human cells. Bioactive constituents from the above resources have been found on the green metallic NPs, which has demonstrated their efficacies as prospective antibiotics and anti-cancer agents against a range of human pathogens and cancer cells. Moreover, these NPs can be characterized for the size, shapes, functional groups, surface properties, porosity, hydrodynamic stability, and surface charge using different characterization techniques. The novelty and originality of this review is that we provide recent research compilations on green synthesis of NPs by marine macroalgae and other biological sources (plant, bacteria, fungi, actinomycetes, yeast, and virus). Besides, we elaborated on the detailed intra- and extracellular mechanisms of NPs synthesis by marine macroalgae. The application of green NPs as anti-bacterial, anti-cancer, and popular methods of NPs characterization techniques has also been critically reviewed.
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Affiliation(s)
- Sabiha Mahmood Ansari
- Botany & Microbiology Department, College of Science, King Saud University, P.O. Box 2455, Riyadh 11451, Saudi Arabia
| | - Quaiser Saquib
- Zoology Department, College of Science, King Saud University, P.O. Box 2455, Riyadh 11451, Saudi Arabia
| | - Valeria De Matteis
- Department of Mathematics and Physics “E. De Giorgi”, University of Salento, Via per Arnesano, 73100 Lecce, Italy
| | - Hend Awad Alwathnani
- Botany & Microbiology Department, College of Science, King Saud University, P.O. Box 2455, Riyadh 11451, Saudi Arabia
| | - Sulaiman Ali Alharbi
- Botany & Microbiology Department, College of Science, King Saud University, P.O. Box 2455, Riyadh 11451, Saudi Arabia
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Ercole TG, Savi DC, Adamoski D, Kava VM, Hungria M, Galli-Terasawa LV. Diversity of maize (Zea mays L.) rhizobacteria with potential to promote plant growth. Braz J Microbiol 2021; 52:1807-1823. [PMID: 34458975 DOI: 10.1007/s42770-021-00596-y] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2021] [Accepted: 08/15/2021] [Indexed: 11/30/2022] Open
Abstract
Plant growth-limiting factors, such as low nutrient availability and weak pathogen resistance, may hinder the production of several crops. Plant growth-promoting bacteria (PGPB) used in agriculture, which stimulate plant growth and development, can serve as a potential tool to mitigate or even circumvent these limitations. The present study evaluated the feasibility of using bacteria isolated from the maize rhizosphere as PGPB for the cultivation of this crop. A total of 282 isolates were collected and clustered into 57 groups based on their genetic similarity using BOX-PCR. A representative isolate from each group was selected and identified at the genus level with 16S rRNA sequencing. The identified genera included Bacillus (61.5% of the isolates), Lysinibacillus (30.52%), Pseudomonas (3.15%), Stenotrophomonas (2.91%), Paenibacillus (1.22%), Enterobacter (0.25%), Rhizobium (0.25%), and Atlantibacter (0.25%). Eleven isolates with the highest performance were selected for analyzing the possible pathways underlying plant growth promotion using biochemical and molecular techniques. Of the selected isolates, 90.9% were positive for indolepyruvate/phenylpyruvate decarboxylase, 54.4% for pyrroloquinoline quinine synthase, 36.4% for nitrogenase reductase, and 27.3% for nitrite reductase. Based on biochemical characterization, 9.1% isolates could fix nitrogen, 36.6% could solubilize phosphate, 54.5% could produce siderophores, and 90.9% could produce indole acetic acid. Enzymatic profiling revealed that the isolates could degrade starch (90.1%), cellulose (72.7%), pectin (81.8%), protein (90.9%), chitin (18.2%), urea (54.5%), and esters (45.4%). Based on the data obtained, we identified three Bacillus spp. (LGMB12, LGMB273, and LGMB426), one Stenotrophomonas sp. (LGMB417), and one Pseudomonas sp. (LGMB456) with the potential to serve as PGPB for maize. Further research is warranted to evaluate the biotechnological potential of these isolates as biofertilizers under field conditions.
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Affiliation(s)
- Tairine G Ercole
- Department of Genetics, Universidade Federal Do Paraná, Av. Coronel Francisco Heráclito Dos Santos, 210. CEP, Curitiba, PR, 81531-970, Brazil
| | - Daiani C Savi
- Department of Biomedicine, Centro Universitário Católica de Santa Catarina, R. Visconde de Taunay, 427. CEP, Joinville, SC, 89203-005, Brazil
| | - Douglas Adamoski
- Department of Genetics, Universidade Federal Do Paraná, Av. Coronel Francisco Heráclito Dos Santos, 210. CEP, Curitiba, PR, 81531-970, Brazil
- Brazilian Biosciences National Laboratory (LNBio), Brazilian Center for Research in Energy and Materials (CNPEM), 13083-970, Campinas, Sao Paulo, Brazil
| | - Vanessa M Kava
- Department of Genetics, Universidade Federal Do Paraná, Av. Coronel Francisco Heráclito Dos Santos, 210. CEP, Curitiba, PR, 81531-970, Brazil
| | | | - Lygia V Galli-Terasawa
- Department of Genetics, Universidade Federal Do Paraná, Av. Coronel Francisco Heráclito Dos Santos, 210. CEP, Curitiba, PR, 81531-970, Brazil.
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12
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Houida S, Yakkou L, Bilen S, Raouane M, El Harti A, Amghar S. Taxonomic and functional characteristics of aerobic bacteria isolated from the chloragogenous tissue of the earthworm Aporrectodea molleri. Arch Microbiol 2021; 203:4805-4812. [PMID: 34196750 DOI: 10.1007/s00203-021-02396-2] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2021] [Revised: 05/18/2021] [Accepted: 05/20/2021] [Indexed: 11/30/2022]
Abstract
Earthworms are considered as a rich microhabitat for the growth and proliferation of diverse soil microorganisms. Hence, earthworms' associated bacteria attracted interest due to their high metabolic profiles and benefits to soil fertility and plant growth. In this study, we aimed to isolate for the first-time aerobic bacteria present in the chloragogenous tissue of the earthworm Apporectodea molleri and test their Plant Growth-Promoting abilities and their resistance to heavy metals (Mn, Zn, Cu, Cd, and Ni). The 16S rRNA gene sequencing revealed the affiliation of the fifteen isolates to six main bacterial genera: Enterobacter, Citrobacter, Aeromonas, Pseudomonas, Bacillus, Terribacillus. These strains displayed different plant growth promoting traits (e.g., indole-3-acetic acid IAA, siderophores, nitrogen fixation, phosphate, and potassium solubilization), in addition, they were able to resist differently to heavy metals. Bacillus strains were most effective as three strains, namely B. subtilis strain TC34; B. circulans strain TC7 and Bacillus sp. strain TC10, were positive to all PGP traits and resisted to all heavy metals. This study illustrates the potential of bacteria from the chloragogenous tissue to exhibit multiple properties, which can be related to the functional feature of this tissue to stock metabolites and neutralize toxic elements.
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Affiliation(s)
- Sofia Houida
- Research Team «Lumbricidae, Improving Soil Productivity and Environment (LAPSE)», Centre Eau, Ressources Naturelles, Environnement et Développement Durable (CERNE2D), Ecole Normale Supérieure (ENS), Mohammed V University in Rabat, 5118, Rabat, Morocco.,Department of Soil Science and Plant Nutrition, Faculty of Agriculture, Atatürk University, Erzurum, 25240, Turkey
| | - Lamia Yakkou
- Research Team «Lumbricidae, Improving Soil Productivity and Environment (LAPSE)», Centre Eau, Ressources Naturelles, Environnement et Développement Durable (CERNE2D), Ecole Normale Supérieure (ENS), Mohammed V University in Rabat, 5118, Rabat, Morocco.,Department of Soil Science and Plant Nutrition, Faculty of Agriculture, Atatürk University, Erzurum, 25240, Turkey
| | - Serdar Bilen
- Department of Soil Science and Plant Nutrition, Faculty of Agriculture, Atatürk University, Erzurum, 25240, Turkey.
| | - Mohammed Raouane
- Research Team «Lumbricidae, Improving Soil Productivity and Environment (LAPSE)», Centre Eau, Ressources Naturelles, Environnement et Développement Durable (CERNE2D), Ecole Normale Supérieure (ENS), Mohammed V University in Rabat, 5118, Rabat, Morocco
| | - Abdellatif El Harti
- Research Team «Lumbricidae, Improving Soil Productivity and Environment (LAPSE)», Centre Eau, Ressources Naturelles, Environnement et Développement Durable (CERNE2D), Ecole Normale Supérieure (ENS), Mohammed V University in Rabat, 5118, Rabat, Morocco
| | - Souad Amghar
- Research Team «Lumbricidae, Improving Soil Productivity and Environment (LAPSE)», Centre Eau, Ressources Naturelles, Environnement et Développement Durable (CERNE2D), Ecole Normale Supérieure (ENS), Mohammed V University in Rabat, 5118, Rabat, Morocco
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13
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Production, Purification, and Characterization of Bacillibactin Siderophore of Bacillus subtilis and Its Application for Improvement in Plant Growth and Oil Content in Sesame. SUSTAINABILITY 2021. [DOI: 10.3390/su13105394] [Citation(s) in RCA: 58] [Impact Index Per Article: 19.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Siderophores are low molecular weight secondary metabolites produced by microorganisms under low iron stress as a specific iron chelator. In the present study, a rhizospheric bacterium was isolated from the rhizosphere of sesame plants from Salem district, Tamil Nadu, India and later identified as Bacillus subtilis LSBS2. It exhibited multiple plant-growth-promoting (PGP) traits such as hydrogen cyanide (HCN), ammonia, and indole acetic acid (IAA), and solubilized phosphate. The chrome azurol sulphonate (CAS) agar plate assay was used to screen the siderophore production of LSBS2 and quantitatively the isolate produced 296 mg/L of siderophores in succinic acid medium. Further characterization of the siderophore revealed that the isolate produced catecholate siderophore bacillibactin. A pot culture experiment was used to explore the effect of LSBS2 and its siderophore in promoting iron absorption and plant growth of Sesamum indicum L. Data from the present study revealed that the multifarious Bacillus sp. LSBS2 could be exploited as a potential bioinoculant for growth and yield improvement in S. indicum.
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14
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Valenzuela‐Heredia D, Henríquez‐Castillo C, Donoso R, Lavín P, Ringel MT, Brüser T, Campos JL. An unusual overrepresentation of genetic factors related to iron homeostasis in the genome of the fluorescent Pseudomonas sp. ABC1. Microb Biotechnol 2021; 14:1060-1072. [PMID: 33492712 PMCID: PMC8085936 DOI: 10.1111/1751-7915.13753] [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: 10/13/2020] [Revised: 12/29/2020] [Accepted: 01/02/2021] [Indexed: 12/25/2022] Open
Abstract
Members of the genus Pseudomonas inhabit diverse environments, such as soil, water, plants and humans. The variability of habitats is reflected in the diversity of the structure and composition of their genomes. This cosmopolitan bacterial genus includes species of biotechnological, medical and environmental importance. In this study, we report on the most relevant genomic characteristics of Pseudomonas sp. strain ABC1, a siderophore-producing fluorescent strain recently isolated from soil. Phylogenomic analyses revealed that this strain corresponds to a novel species forming a sister clade of the recently proposed Pseudomonas kirkiae. The genomic information reveals an overrepresented repertoire of mechanisms to hoard iron when compared to related strains, including a high representation of fecI-fecR family genes related to iron regulation and acquisition. The genome of the Pseudomonas sp. ABC1 contains the genes for non-ribosomal peptide synthetases (NRPSs) of a novel putative Azotobacter-related pyoverdine-type siderophore, a yersiniabactin-type siderophore and an antimicrobial betalactone; the last two are found only in a limited number of Pseudomonas genomes. Strain ABC1 can produce siderophores in a low-cost medium, and the supernatants from cultures of this strain promote plant growth, highlighting their biotechnological potential as a sustainable industrial microorganism.
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Affiliation(s)
| | - Carlos Henríquez‐Castillo
- Laboratorio de Fisiología y Genética Marina (FIGEMA)Centro de Estudios Avanzados de Zonas Áridas (CEAZA)CoquimboChile
- Facultad de Ciencias del MarUniversidad Católica del NorteCoquimboChile
| | - Raúl Donoso
- Programa Institucional de Fomento a la InvestigaciónDesarrollo, e Innovación (PIDi)Universidad Tecnológica MetropolitanaSantiagoChile
| | - Paris Lavín
- Facultad de Ciencias del Mar y Recursos BiológicosDepartamento de BiotecnologíaLaboratorio de Complejidad Microbiana y Ecología FuncionalInstituto AntofagastaUniversidad de AntofagastaAntofagastaChile
- Network for Extreme Environments Research (NEXER)Universidad de AntofagastaUniversidad de La Frontera y Universidad de MagallanesPunta ArenasChile
| | | | - Thomas Brüser
- Institute of MicrobiologyLeibniz University HannoverHannoverGermany
| | - José Luis Campos
- Facultad de Ingeniería y CienciasUniversidad Adolfo IbáñezViña del MarChile
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15
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Singh P, Khan A, Kumar R, Kumar R, Singh VK, Srivastava A. Recent developments in siderotyping: procedure and application. World J Microbiol Biotechnol 2020; 36:178. [PMID: 33128090 DOI: 10.1007/s11274-020-02955-7] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2020] [Accepted: 10/27/2020] [Indexed: 12/31/2022]
Abstract
Siderophores are metal chelating secondary metabolites secreted by almost all organisms. Beside iron starvation, the ability to produce siderophores depends upon several other factors. Chemical structure of siderophore is very complex with vast structural diversity, thus the principle challenge involves its detection, quantification, purification and characterisation. Metal chelation is its most fascinating attribute. This metal chelation property is now forming the basis of its application as molecular markers, siderotyping tool for taxonomic clarification, biosensors and bioremediation agents. This has led researchers to develop and continuously modify previous techniques in order to provide accurate and reproducible methods of studying siderophores. Knowledge obtained via computational approaches provides a new horizon in the field of siderophore biosynthetic gene clusters and their interaction with various proteins/peptides. This review illustrates various techniques, bioinformatics tools and databases employed in siderophores' studies, the principle of analytical methods and their recent applications.
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Affiliation(s)
- Pratika Singh
- Department of Life Science, School of Earth, Biological and Environmental Sciences, Central University of South Bihar, Gaya, 824236, India
| | - Azmi Khan
- Department of Life Science, School of Earth, Biological and Environmental Sciences, Central University of South Bihar, Gaya, 824236, India
| | - Rakesh Kumar
- Department of Bioinformatics, School of Earth, Biological and Environmental Sciences, Central University of South Bihar, Gaya, 824236, India
| | - Ravinsh Kumar
- Department of Life Science, School of Earth, Biological and Environmental Sciences, Central University of South Bihar, Gaya, 824236, India
| | - Vijay Kumar Singh
- Department of Bioinformatics, School of Earth, Biological and Environmental Sciences, Central University of South Bihar, Gaya, 824236, India
| | - Amrita Srivastava
- Department of Life Science, School of Earth, Biological and Environmental Sciences, Central University of South Bihar, Gaya, 824236, India.
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16
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Khan MS, Gao J, Zhang M, Chen X, Moe TS, Du Y, Yang F, Xue J, Zhang X. Isolation and characterization of plant growth-promoting endophytic bacteria Bacillus stratosphericus LW-03 from Lilium wardii. 3 Biotech 2020; 10:305. [PMID: 32612899 PMCID: PMC7313711 DOI: 10.1007/s13205-020-02294-2] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2019] [Accepted: 06/07/2020] [Indexed: 02/01/2023] Open
Abstract
In the present study, a new strain of Bacillus stratosphericus LW-03 was isolated from the bulbs of Lilium wardii. The isolated endophytic strain LW-03 exhibited excellent antifungal activity against common plant pathogens, such as Fusarium oxysporum, Botryosphaeria dothidea, Botrytis cinerea, and Fusarium fujikuroi. The growth inhibition percentage of Botryosphaeria dothidea was 74.56 ± 2.35%, which was the highest, followed by Botrytis cinerea, Fusarium fujikuroi, and Fusarium oxysporum were 71.91 ± 2.87%, 69.54 ± 2.73%, and 65.13 ± 1.91%, respectively. The ethyl acetate fraction revealed a number of bioactive compounds and several of which were putatively identified as antimicrobial agents, such as 4-hydroxy-2-nonenylquinoline N-oxide, sphingosine ceramides like cer(d18:0/16:0(2OH)), cer(d18:0/16:0), and cer(d18:1/0:0), di-peptides, tri-peptide, cyclopeptides [cyclo(D-Trp-L-Pro)], [cyclo (Pro-Phe)], dehydroabietylamine, oxazepam, 1-palmitoyl-2-arachidonoyl-sn-glycero-3-phosphocholine like compound (PC(0:0/20:4), phosphatidylethanolamine (PE(18:1/0:0)), 3-Hydroxyoctadecanoic acid, 7.alpha.,27-Dihydroxycholesterol, N-Acetyl-d-mannosamine, p-Hydroxyphenyllactic acid, Phytomonic acid, and 2-undecenyl-quinoloin-4 (1H). The LW-03 strain exhibits multiple plant growth-promoting traits, including the production of organic acids, ACC deaminase, indole-3-acetic acid (IAA), siderophores, and nitrogen fixation activity. The beneficial effects of the endophytic strain LW-03 on the growth of two lily varieties were further evaluated under greenhouse conditions. Our results revealed plant growth-promoting activity in inoculated plants relative to non-inoculated control plants. The broad-spectrum antifungal activity and multiple plant growth-promoting properties of Bacillus stratosphericus LW-03 make it an important player in the development of biological fertilizers and sustainable agricultural biological control strategies.
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Affiliation(s)
- Mohammad Sayyar Khan
- Beijing Agro-Biotechnology Research Center, Beijing Academy of Agriculture and Forestry Sciences, Beijing, 100097 China
- Genomics and Bioinformatics Division, Institute of Biotechnology and Genetic Engineering (IBGE), The University of Agriculture, Khyber Pakhtunkhwa, Peshawar, 25000 Pakistan
| | - Junlian Gao
- Beijing Agro-Biotechnology Research Center, Beijing Academy of Agriculture and Forestry Sciences, Beijing, 100097 China
| | - Mingfang Zhang
- Beijing Agro-Biotechnology Research Center, Beijing Academy of Agriculture and Forestry Sciences, Beijing, 100097 China
| | - Xuqing Chen
- Beijing Agro-Biotechnology Research Center, Beijing Academy of Agriculture and Forestry Sciences, Beijing, 100097 China
| | - The Su Moe
- Beijing Agro-Biotechnology Research Center, Beijing Academy of Agriculture and Forestry Sciences, Beijing, 100097 China
- Pharmaceutical Research Laboratory, Biotechnology Research Department, Ministry of Education, Mandalay Division, Kyaukse, 05151 Myanmar
| | - Yunpeng Du
- Beijing Agro-Biotechnology Research Center, Beijing Academy of Agriculture and Forestry Sciences, Beijing, 100097 China
| | - Fengping Yang
- Beijing Agro-Biotechnology Research Center, Beijing Academy of Agriculture and Forestry Sciences, Beijing, 100097 China
| | - Jing Xue
- Beijing Agro-Biotechnology Research Center, Beijing Academy of Agriculture and Forestry Sciences, Beijing, 100097 China
| | - Xiuhai Zhang
- Beijing Agro-Biotechnology Research Center, Beijing Academy of Agriculture and Forestry Sciences, Beijing, 100097 China
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17
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Khan MS, Gao J, Chen X, Zhang M, Yang F, Du Y, Moe TS, Munir I, Xue J, Zhang X. The Endophytic Bacteria Bacillus velezensis Lle-9, Isolated from Lilium leucanthum, Harbors Antifungal Activity and Plant Growth-Promoting Effects. J Microbiol Biotechnol 2020; 30:668-680. [PMID: 32482932 PMCID: PMC9728359 DOI: 10.4014/jmb.1910.10021] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2019] [Accepted: 01/28/2020] [Indexed: 12/15/2022]
Abstract
Bacillus velezensis is an important plant growth-promoting rhizobacterium with immense potential in agriculture development. In the present study, Bacillus velezensis Lle-9 was isolated from the bulbs of Lilium leucanthum. The isolated strain showed antifungal activities against plant pathogens like Botryosphaeria dothidea, Fusarium oxysporum, Botrytis cinerea and Fusarium fujikuroi. The highest percentage of growth inhibition i.e., 68.56±2.35% was observed against Fusarium oxysporum followed by 63.12 ± 2.83%, 61.67 ± 3.39% and 55.82 ± 2.76% against Botrytis cinerea, Botryosphaeria dothidea, and Fusarium fujikuroi, respectively. The ethyl acetate fraction revealed a number of bioactive compounds and several were identified as antimicrobial agents such as diketopiperazines, cyclo-peptides, linear peptides, latrunculin A, 5α-hydroxy-6-ketocholesterol, (R)-S-lactoylglutathione, triamterene, rubiadin, moxifloxacin, 9-hydroxy-5Z,7E,11Z,14Zeicosatetraenoic acid, D-erythro-C18-Sphingosine, citrinin, and 2- arachidonoyllysophosphatidylcholine. The presence of these antimicrobial compounds in the bacterial culture might have contributed to the antifungal activities of the isolated B. velezensis Lle- 9. The strain showed plant growth-promoting traits such as production of organic acids, ACC deaminase, indole-3-acetic acid (IAA), siderophores, and nitrogen fixation and phosphate solubilization. IAA production was accelerated with application of exogenous tryptophan concentrations in the medium. Further, the lily plants upon inoculation with Lle-9 exhibited improved vegetative growth, more flowering shoots and longer roots than control plants under greenhouse condition. The isolated B. velezensis strain Lle-9 possessed broad-spectrum antifungal activities and multiple plant growth-promoting traits and thus may play an important role in promoting sustainable agriculture. This strain could be developed and applied in field experiments in order to promote plant growth and control disease pathogens.
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Affiliation(s)
- Mohammad Sayyar Khan
- Beijing Agro-Biotechnology Research Center, Beijing Academy of Agriculture and Forestry Sciences, Beijing 00097, P.R. China
- Genomics and Bioinformatics Division, Institute of Biotechnology and Genetic Engineering (IBGE), The University of Agriculture, Peshawar 5000 Khyber Pakhtunkhwa, Pakistan
| | - Junlian Gao
- Beijing Agro-Biotechnology Research Center, Beijing Academy of Agriculture and Forestry Sciences, Beijing 00097, P.R. China
| | - Xuqing Chen
- Beijing Agro-Biotechnology Research Center, Beijing Academy of Agriculture and Forestry Sciences, Beijing 00097, P.R. China
| | - Mingfang Zhang
- Beijing Agro-Biotechnology Research Center, Beijing Academy of Agriculture and Forestry Sciences, Beijing 00097, P.R. China
| | - Fengping Yang
- Beijing Agro-Biotechnology Research Center, Beijing Academy of Agriculture and Forestry Sciences, Beijing 00097, P.R. China
| | - Yunpeng Du
- Beijing Agro-Biotechnology Research Center, Beijing Academy of Agriculture and Forestry Sciences, Beijing 00097, P.R. China
| | - The Su Moe
- Beijing Agro-Biotechnology Research Center, Beijing Academy of Agriculture and Forestry Sciences, Beijing 00097, P.R. China
- Pharmaceutical Research Laboratory, Biotechnology Research Department, Ministry of Education, Mandalay Division, Kyaukse 05151, Myanmar
| | - Iqbal Munir
- Genomics and Bioinformatics Division, Institute of Biotechnology and Genetic Engineering (IBGE), The University of Agriculture, Peshawar 5000 Khyber Pakhtunkhwa, Pakistan
| | - Jing Xue
- Beijing Agro-Biotechnology Research Center, Beijing Academy of Agriculture and Forestry Sciences, Beijing 00097, P.R. China
| | - Xiuhai Zhang
- Beijing Agro-Biotechnology Research Center, Beijing Academy of Agriculture and Forestry Sciences, Beijing 00097, P.R. China
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Isolation and Characterization of Plant Growth-Promoting Endophytic Bacteria Paenibacillus polymyxa SK1 from Lilium lancifolium. BIOMED RESEARCH INTERNATIONAL 2020; 2020:8650957. [PMID: 32190683 PMCID: PMC7064867 DOI: 10.1155/2020/8650957] [Citation(s) in RCA: 45] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/19/2019] [Accepted: 12/31/2019] [Indexed: 12/18/2022]
Abstract
Paenibacillus polymyxa is a plant growth-promoting rhizobacterium that has immense potential to be used as an environmentally friendly replacement of chemical fertilizers and pesticides. In the present study, Paenibacillus polymyxa SK1 was isolated from bulbs of Lilium lancifolium. The isolated endophytic strain showed antifungal activities against important plant pathogens like Botryosphaeria dothidea, Fusarium oxysporum, Botrytis cinerea, and Fusarium fujikuroi. The highest percentage of growth inhibition, i.e., 66.67 ± 2.23%, was observed for SK1 against Botryosphaeria dothidea followed by 61.19 ± 3.12%, 60.71 ± 3.53%, and 55.54 ± 2.89% against Botrytis cinerea, Fusarium fujikuroi, and Fusarium oxysporum, respectively. The metabolite profiling of ethyl acetate fraction was assessed through the UHPLC-LTQ-IT-MS/MS analysis, and putative identification was done with the aid of the GNPS molecular networking workflow. A total of 29 compounds were putatively identified which included dipeptides, tripeptides, cyclopeptides (cyclo-(Leu-Leu), cyclo(Pro-Phe)), 2-heptyl-3-hydroxy 4-quinolone, 6-oxocativic acid, anhydrobrazilic acid, 1-(5-methoxy-1H-indol-3-yl)-2-piperidin-1-ylethane-1,2-dione, octadecenoic acid, pyochelin, 15-hydroxy-5Z,8Z,11Z, 13E-eicosatetraenoic acid, (Z)-7-[(2R,3S)-3-[(2Z,5E)-Undeca-2,5-dienyl]oxiran-2-yl]hept-5-enoic acid, arginylasparagine, cholic acid, sphinganine, elaidic acid, gossypin, L-carnosine, tetrodotoxin, and ursodiol. The high antifungal activity of SK1 might be attributed to the presence of these bioactive compounds. The isolated strain SK1 showed plant growth-promoting traits such as the production of organic acids, ACC deaminase, indole-3-acetic acid (IAA), siderophores, nitrogen fixation, and phosphate solubilization. IAA production was strongly correlated with the application of exogenous tryptophan concentrations in the medium. Furthermore, inoculation of SK1 enhanced plant growth of two Lilium varieties, Tresor and White Heaven, under greenhouse condition. In the light of these findings, the P. polymyxa SK1 may be utilized as a source of plant growth promotion and disease control in sustainable agriculture.
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Khalikova E, Somersalo S, Korpela T. Metabolites Produced by Alkaliphiles with Potential Biotechnological Applications. ADVANCES IN BIOCHEMICAL ENGINEERING/BIOTECHNOLOGY 2019; 172:157-193. [PMID: 31240347 DOI: 10.1007/10_2019_96] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
Alkaliphiles are a diverse group of relatively less known microorganisms living in alkaline environments. To thrive in alkaline environments, alkaliphiles require special adaptations. This adaptation may have evolved metabolites which can be useful for biotechnological processes or other applications. In fact, certain metabolites are found unique to alkaliphiles or are effectively produced by alkaliphiles. This probably aroused the interest in metabolites of alkaliphiles. During recent years, many alkaliphilic microbes have been isolated, especially in countries having alkaline environments, like soda lakes. Even if the number of such isolated alkaliphiles is large, their metabolites have not yet been extensively analyzed and exploited. This is expected to come in the years ahead. So far, the focus of interests in metabolites from alkaliphiles falls into categories such as organic acids, ingredients for foodstuffs and cosmetics, antibiotics, and substances which modify properties of other materials used in industry. This chapter deals with biotechnologically important metabolites of alkaliphiles including compatible solutes, biosurfactants, siderophores, carotenoids, exopolysaccharides, and antimicrobial agents. It also covers the promising potential of alkaliphiles as sources of bioplastic raw materials. Moreover, an overview of the patent literature related to alkaliphiles is highlighted. Graphical Abstract.
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Affiliation(s)
- Elvira Khalikova
- Joint Biotechnology Laboratory, University of Turku, Turku, Finland
| | | | - Timo Korpela
- Department of Future Technologies, University of Turku, Turku, Finland.
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Role of novel bacterial Raoultella sp. strain X13 in plant growth promotion and cadmium bioremediation in soil. Appl Microbiol Biotechnol 2019; 103:3887-3897. [PMID: 30820635 DOI: 10.1007/s00253-019-09700-7] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2018] [Revised: 02/13/2019] [Accepted: 02/14/2019] [Indexed: 01/10/2023]
Abstract
Heavy metal pollution in agricultural soils has become a widespread serious problem with the rapid industrialization and urbanization in the past two decades. Cadmium (Cd2+) is of the most concern in soils due to its high toxicity. It is necessary to develop remediation strategies to remove or neutralize its toxic effects in Cd-contaminated soil. Microbial bioremediation is a promising technology to treat heavy metal-contaminated soils. In this study, Cd-resistant bacterium, isolated from heavy metal-polluted soil in Southern China, was characterized as Raoultella sp. strain X13 on the basis of its biochemical profile and 16S rRNA. We investigated the characterization of Cd2+ distribution in different cellular compartments after Cd2+ uptake. Cd2+ uptake by strain X13 was mainly by ion exchange and chelation binding tightly to the cell wall. In addition, X13 plant growth-promoting characteristics suggested that X13 could solubilize phosphate and produce indole acetic acid. Pot experiments for the remediation of Cd-contaminated soil in situ by X13 inoculation demonstrated that X13 application to Cd-contaminated soils significantly promoted pak choi growth and improved production. We also found that X13 substantially reduced the Cd2+ bioavailability for pak choi. Therefore, strain X13 is an effective treatment for potential application in Cd2+ remediation as well as for sustainable agronomic production programs in Cd-contaminated soils.
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Modified microplate method for rapid and efficient estimation of siderophore produced by bacteria. 3 Biotech 2017; 7:381. [PMID: 29109926 PMCID: PMC5658296 DOI: 10.1007/s13205-017-1008-y] [Citation(s) in RCA: 98] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2017] [Accepted: 10/09/2017] [Indexed: 12/20/2022] Open
Abstract
In this study, siderophore production by various bacteria amongst the plant-growth-promoting rhizobacteria was quantified by a rapid and efficient method. In total, 23 siderophore-producing bacterial isolates/strains were taken to estimate their siderophore-producing ability by the standard method (chrome azurol sulphonate assay) as well as 96 well microplate method. Production of siderophore was estimated in percent siderophore unit by both the methods. It was observed that data obtained by both methods correlated positively with each other proving the correctness of microplate method. By the modified microplate method, siderophore production by several bacterial strains can be estimated both qualitatively and quantitatively at one go, saving time, chemicals, making it very less tedious, and also being cheaper in comparison with the method currently in use. The modified microtiter plate method as proposed here makes it far easier to screen the plant-growth-promoting character of plant-associated bacteria.
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