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de Moraes ACP, Ribeiro LDS, de Camargo ER, Lacava PT. The potential of nanomaterials associated with plant growth-promoting bacteria in agriculture. 3 Biotech 2021; 11:318. [PMID: 34194902 PMCID: PMC8190246 DOI: 10.1007/s13205-021-02870-0] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2021] [Accepted: 05/31/2021] [Indexed: 01/18/2023] Open
Abstract
The impacts of chemical fertilizers and pesticides have raised public concerns regarding the sustainability and security of food supplies, prompting the investigation of alternative methods that have combinations of both agricultural and environmental benefits, such as the use of biofertilizers involving microbes. These types of microbial inoculants are living microorganisms that colonize the soil or plant tissues when applied to the soil, seeds, or plant surfaces, facilitating plant nutrient acquisition. They can enhance plant growth by transforming nutrients into a form assimilable by plants and by acting as biological control agents, known as plant growth-promoting bacteria. The potential use of bacteria as biofertilizers in agriculture constitutes an economical and eco-friendly way to reduce the use of chemical fertilizers and pesticides. In this context, nanotechnology has emerged as a new source of quality enrichment for the agricultural sector. The use of nanoparticles can be an effective method to meet the challenges regarding the effectiveness of biofertilizers in natural environments. Given the novel sustainable strategies applied in agricultural systems, this review addresses the effects of nanoparticles on beneficial plant bacteria for promoting plant growth.
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Affiliation(s)
- Amanda Carolina Prado de Moraes
- Laboratory of Microbiology and Biomolecules, Department of Morphology and Pathology, Federal University of São Carlos (UFSCar), Rod. Washington Luiz, s/n, São Carlos, 13565-905 Brazil
- Biotechnology Graduation Program (PPG-Biotec), Federal University of São Carlos (UFSCar), Rod. Washington Luiz, s/n, São Carlos, 13565-905 Brazil
| | - Lucas da Silva Ribeiro
- Interdisciplinary Laboratory of Electrochemistry and Ceramics, Department of Chemistry, Federal University of São Carlos (UFSCar), Rod. Washington Luiz, s/n, São Carlos, 13565-905 Brazil
| | - Emerson Rodrigues de Camargo
- Interdisciplinary Laboratory of Electrochemistry and Ceramics, Department of Chemistry, Federal University of São Carlos (UFSCar), Rod. Washington Luiz, s/n, São Carlos, 13565-905 Brazil
| | - Paulo Teixeira Lacava
- Laboratory of Microbiology and Biomolecules, Department of Morphology and Pathology, Federal University of São Carlos (UFSCar), Rod. Washington Luiz, s/n, São Carlos, 13565-905 Brazil
- Biotechnology Graduation Program (PPG-Biotec), Federal University of São Carlos (UFSCar), Rod. Washington Luiz, s/n, São Carlos, 13565-905 Brazil
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Etesami H, Jeong BR, Glick BR. Contribution of Arbuscular Mycorrhizal Fungi, Phosphate-Solubilizing Bacteria, and Silicon to P Uptake by Plant. FRONTIERS IN PLANT SCIENCE 2021; 12:699618. [PMID: 34276750 PMCID: PMC8280758 DOI: 10.3389/fpls.2021.699618] [Citation(s) in RCA: 73] [Impact Index Per Article: 24.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/23/2021] [Accepted: 06/10/2021] [Indexed: 05/22/2023]
Abstract
Phosphorus (P) availability is usually low in soils around the globe. Most soils have a deficiency of available P; if they are not fertilized, they will not be able to satisfy the P requirement of plants. P fertilization is generally recommended to manage soil P deficiency; however, the low efficacy of P fertilizers in acidic and in calcareous soils restricts P availability. Moreover, the overuse of P fertilizers is a cause of significant environmental concerns. However, the use of arbuscular mycorrhizal fungi (AMF), phosphate-solubilizing bacteria (PSB), and the addition of silicon (Si) are effective and economical ways to improve the availability and efficacy of P. In this review the contributions of Si, PSB, and AMF in improving the P availability is discussed. Based on what is known about them, the combined strategy of using Si along with AMF and PSB may be highly useful in improving the P availability and as a result, its uptake by plants compared to using either of them alone. A better understanding how the two microorganism groups and Si interact is crucial to preserving soil fertility and improving the economic and environmental sustainability of crop production in P deficient soils. This review summarizes and discusses the current knowledge concerning the interactions among AMF, PSB, and Si in enhancing P availability and its uptake by plants in sustainable agriculture.
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Affiliation(s)
- Hassan Etesami
- Department of Soil Science, University of Tehran, Tehran, Iran
| | - Byoung Ryong Jeong
- Department of Horticulture, Division of Applied Life Science (BK21+ Program), Graduate School, Gyeongsang National University, Jinju, South Korea
| | - Bernard R. Glick
- Department of Biology, University of Waterloo, Waterloo, ON, Canada
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Lozins R, Selga T, Ozoliņš D. Microorganism adhesion using silicon dioxide: An experimental study. Heliyon 2020; 6:e03678. [PMID: 32280796 PMCID: PMC7139121 DOI: 10.1016/j.heliyon.2020.e03678] [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: 06/26/2019] [Revised: 08/14/2019] [Accepted: 03/24/2020] [Indexed: 11/17/2022] Open
Abstract
In this study, spectrophotometry was used to measure changes in the absorbance properties of yeast, Gram-positive, and Gram-negative bacteria after their attachment to silicon dioxide microparticles (silica). The goal of this study was to determine whether spectrophotometry is an effective method to distinguish these microorganisms from one another and determine whether they have an affinity for silicon dioxide. The experiments were performed by examining the light absorption properties of yeast, Gram-positive and Gram-negative bacteria in a spectrophotometer, both with and without silicon dioxide microparticles. The experiments produced a number of promising results. First, the spectrophotometer graphs of yeast were noticeably different from those of both Gram-positive and Gram-negative bacteria. Second, the absorption of light in both Gram-positive and Gram-negative bacteria occurred at near infrared range (700-1500 nm) and, unlike yeast, the wavelengths increased when silicon dioxide microparticles were added to the suspension. When silicon dioxide microparticles were added to yeast, the absorption of light decreased during the entire wavelength interval of the spectrophotometer measurement. These results indicate that bacteria have an affinity for silicon dioxide, and that spectrophotometry may be used to distinguish yeast from bacteria and, possibly, different bacterial types from one another.
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Affiliation(s)
- Roberts Lozins
- Residency Development Program, University of Latvia, Riga, Latvia
- Faculty of Medicine, University of Latvia, Riga, Latvia
- Traumatology and Orthopaedics Hospital, Riga, Latvia
| | - Tūrs Selga
- Faculty of Medicine, University of Latvia, Riga, Latvia
| | - Dzintars Ozoliņš
- Residency Development Program, University of Latvia, Riga, Latvia
- Traumatology and Orthopaedics Hospital, Riga, Latvia
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Bhattacharya S, Sen D, Bhattacharjee C. In vitro antibacterial effect analysis of stabilized PEGylated allicin-containing extract from Allium sativum in conjugation with other antibiotics. Process Biochem 2019. [DOI: 10.1016/j.procbio.2019.09.025] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
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Jones AA, Bennett PC. Mineral Ecology: Surface Specific Colonization and Geochemical Drivers of Biofilm Accumulation, Composition, and Phylogeny. Front Microbiol 2017; 8:491. [PMID: 28400754 PMCID: PMC5368280 DOI: 10.3389/fmicb.2017.00491] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2016] [Accepted: 03/09/2017] [Indexed: 01/30/2023] Open
Abstract
This study tests the hypothesis that surface composition influences microbial community structure and growth of biofilms. We used laboratory biofilm reactors (inoculated with a diverse subsurface community) to explore the phylogenetic and taxonomic variability in microbial communities as a function of surface type (carbonate, silicate, aluminosilicate), media pH, and carbon and phosphate availability. Using high-throughput pyrosequencing, we found that surface type significantly controlled ~70–90% of the variance in phylogenetic diversity regardless of environmental pressures. Consistent patterns also emerged in the taxonomy of specific guilds (sulfur-oxidizers/reducers, Gram-positives, acidophiles) due to variations in media chemistry. Media phosphate availability was a key property associated with variation in phylogeny and taxonomy of whole reactors and was negatively correlated with biofilm accumulation and α-diversity (species richness and evenness). However, mineral-bound phosphate limitations were correlated with less biofilm. Carbon added to the media was correlated with a significant increase in biofilm accumulation and overall α-diversity. Additionally, planktonic communities were phylogenetically distant from those in biofilms. All treatments harbored structurally (taxonomically and phylogenetically) distinct microbial communities. Selective advantages within each treatment encouraged growth and revealed the presence of hundreds of additional operational taxonomix units (OTU), representing distinct consortiums of microorganisms. Ultimately, these results provide evidence that mineral/rock composition significantly influences microbial community structure, diversity, membership, phylogenetic variability, and biofilm growth in subsurface communities.
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Affiliation(s)
- Aaron A Jones
- Department of Geological Sciences, University of Texas at Austin Austin, TX, USA
| | - Philip C Bennett
- Department of Geological Sciences, University of Texas at Austin Austin, TX, USA
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Winsley TJ, Snape I, McKinlay J, Stark J, van Dorst JM, Ji M, Ferrari BC, Siciliano SD. The ecological controls on the prevalence of candidate division TM7 in polar regions. Front Microbiol 2014; 5:345. [PMID: 25076941 PMCID: PMC4097103 DOI: 10.3389/fmicb.2014.00345] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2014] [Accepted: 06/21/2014] [Indexed: 11/13/2022] Open
Abstract
The candidate division TM7 is ubiquitous and yet uncultured phylum of the Bacteria that encompasses a commonly environmental associated clade, TM7-1, and a “host-associated” clade, TM7-3. However, as members of the TM7 phylum have not been cultured, little is known about what differs between these two clades. We hypothesized that these clades would have different environmental niches. To test this, we used a large-scale global soil dataset, encompassing 223 soil samples, their environmental parameters and associated bacterial 16S rRNA gene sequence data. We correlated chemical, physical and biological parameters of each soil with the relative abundance of the two major classes of the phylum to deduce factors that influence the groups' seemingly ubiquitous nature. The two classes of the phylum (TM7-1 and TM7-3) were indeed distinct from each other in their habitat requirements. A key determinant of each class' prevalence appears to be the pH of the soil. The class TM7-1 displays a facultative anaerobic nature with correlations to more acidic soils with total iron, silicon, titanium and copper indicating a potential for siderophore production. However, the TM7-3 class shows a more classical oligotrophic, heterotroph nature with a preference for more alkaline soils, and a probable pathogenic role with correlations to extractable iron, sodium and phosphate. In addition, the TM7-3 was abundant in diesel contaminated soils highlighting a resilient nature along with a possible carbon source. In addition to this both classes had unique co-occurrence relationships with other bacterial phyla. In particular, both groups had opposing correlations to the Gemmatimonadetes phylum, with the TM7-3 class seemingly being outcompeted by this phylum to result in a negative correlation. These ecological controls allow the characteristics of a TM7 phylum preferred niche to be defined and give insight into possible avenues for cultivation of this previously uncultured group.
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Affiliation(s)
- Tristrom J Winsley
- Australian Antarctic Division, Department of the Environment Kingston, TAS, Australia ; Department of Soil Science, University of Saskatchewan Saskatoon, SK, Canada
| | - Ian Snape
- Australian Antarctic Division, Department of the Environment Kingston, TAS, Australia
| | - John McKinlay
- Australian Antarctic Division, Department of the Environment Kingston, TAS, Australia
| | - Jonny Stark
- Australian Antarctic Division, Department of the Environment Kingston, TAS, Australia
| | - Josie M van Dorst
- Faculty of Science, School of Biotechnology and Biomolecular Sciences, University of New South Wales Kensington, NSW, Australia
| | - Mukan Ji
- Faculty of Science, School of Biotechnology and Biomolecular Sciences, University of New South Wales Kensington, NSW, Australia
| | - Belinda C Ferrari
- Faculty of Science, School of Biotechnology and Biomolecular Sciences, University of New South Wales Kensington, NSW, Australia
| | - Steven D Siciliano
- Department of Soil Science, University of Saskatchewan Saskatoon, SK, Canada
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Karunakaran G, Suriyaprabha R, Manivasakan P, Yuvakkumar R, Rajendran V, Prabu P, Kannan N. Effect of nanosilica and silicon sources on plant growth promoting rhizobacteria, soil nutrients and maize seed germination. IET Nanobiotechnol 2013; 7:70-7. [PMID: 24028804 DOI: 10.1049/iet-nbt.2012.0048] [Citation(s) in RCA: 58] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
Abstract
The study was aimed at evaluating the effect of nanosilica and different sources of silicon on soil properties, total bacterial population and maize seed germination. Nanosilica was synthesised using rice husk and characterised. Silica powder was amorphous (50 nm) with >99.9% purity. Sodium silicate treated soil inhibited plant growth promoting rhizobacteria in contrast to nanosilica and other bulk sources. Surface property and effect of soil nutrient content of nanosilica treatment were improved. Colony forming unit (CFU) was doubled in the presence of nanosilica from 4 × 105 CFU (control) to 8 × 105 CFU per gram of soil. The silica and protein content of bacterial biomass clearly showed an increase in uptake of silica with an increase in nanosilica concentration. Nanosilica promoted seed germination percentage (100%) in maize than conventional Si sources. These studies show that nanosilica has favourable effect on beneficial bacterial population and nutrient value of soil.
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Volodina LA, Zhigach AN, Leypunsky IO, Zotova ES, Glushchenko NN. The influence of physical-chemical characteristics of surface modified copper nanoparticles on E. coli cell population growth suppression and on electrostatic properties of their membranes. Biophysics (Nagoya-shi) 2013. [DOI: 10.1134/s0006350913030202] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
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Chen Y, Yan F, Chai Y, Liu H, Kolter R, Losick R, Guo JH. Biocontrol of tomato wilt disease by Bacillus subtilis isolates from natural environments depends on conserved genes mediating biofilm formation. Environ Microbiol 2013; 15:848-864. [PMID: 22934631 PMCID: PMC3904073 DOI: 10.1111/j.1462-2920.2012.02860.x] [Citation(s) in RCA: 257] [Impact Index Per Article: 23.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2012] [Revised: 07/22/2012] [Accepted: 07/28/2012] [Indexed: 12/21/2022]
Abstract
Bacillus subtilis and other Bacilli have long been used as biological control agents against plant bacterial diseases but the mechanisms by which the bacteria confer protection are not well understood. Our goal in this study was to isolate strains of B. subtilis that exhibit high levels of biocontrol efficacy from natural environments and to investigate the mechanisms by which these strains confer plant protection. We screened a total of 60 isolates collected from various locations across China and obtained six strains that exhibited above 50% biocontrol efficacy on tomato plants against the plant pathogen Ralstonia solanacearum under greenhouse conditions. These wild strains were able to form robust biofilms both in defined medium and on tomato plant roots and exhibited strong antagonistic activities against various plant pathogens in plate assays. We show that plant protection by those strains depended on widely conserved genes required for biofilm formation, including regulatory genes and genes for matrix production. We provide evidence suggesting that matrix production is critical for bacterial colonization on plant root surfaces. Finally, we have established a model system for studies of B. subtilis-tomato plant interactions in protection against a plant pathogen.
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Affiliation(s)
- Yun Chen
- Department of Plant Pathology, College of Plant Protection, Nanjing Agricultural University; Engineering Center of Bioresource Pesticide in Jiangsu Province; Key Laboratory of Integrated Management of Crop Diseases and Pests (Nanjing Agricultural University), Ministry of Education; Nanjing 210095, China
- Department of Molecular and Cellular Biology, Harvard University, Cambridge, MA 02138, USA
| | - Fang Yan
- Department of Plant Pathology, College of Plant Protection, Nanjing Agricultural University; Engineering Center of Bioresource Pesticide in Jiangsu Province; Key Laboratory of Integrated Management of Crop Diseases and Pests (Nanjing Agricultural University), Ministry of Education; Nanjing 210095, China
| | - Yunrong Chai
- Department of Molecular and Cellular Biology, Harvard University, Cambridge, MA 02138, USA
| | - Hongxia Liu
- Department of Plant Pathology, College of Plant Protection, Nanjing Agricultural University; Engineering Center of Bioresource Pesticide in Jiangsu Province; Key Laboratory of Integrated Management of Crop Diseases and Pests (Nanjing Agricultural University), Ministry of Education; Nanjing 210095, China
| | - Roberto Kolter
- Department of Microbiology and Immunology, Harvard Medical School, Boston, MA, 02115, USA
| | - Richard Losick
- Department of Molecular and Cellular Biology, Harvard University, Cambridge, MA 02138, USA
| | - Jian-hua Guo
- Department of Plant Pathology, College of Plant Protection, Nanjing Agricultural University; Engineering Center of Bioresource Pesticide in Jiangsu Province; Key Laboratory of Integrated Management of Crop Diseases and Pests (Nanjing Agricultural University), Ministry of Education; Nanjing 210095, China
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