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Soumare A, Boubekri K, Lyamlouli K, Hafidi M, Ouhdouch Y, Kouisni L. From Isolation of Phosphate Solubilizing Microbes to Their Formulation and Use as Biofertilizers: Status and Needs. Front Bioeng Biotechnol 2020; 7:425. [PMID: 31998701 PMCID: PMC6962098 DOI: 10.3389/fbioe.2019.00425] [Citation(s) in RCA: 62] [Impact Index Per Article: 15.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2019] [Accepted: 12/02/2019] [Indexed: 11/13/2022] Open
Abstract
The production of biofertilizers at industrial level is a bottleneck because bacterial strains are generally developed and managed by research laboratories and not by production units. A seamless transition from laboratory to field application is, therefore necessary. This review provides an overview of the constraints that limiting the application or the implementation of Actinobacteria based biofertilizers especially in agricultural field and suggests solutions to overcome some of these limits. General processes of making and controlling the quality of the inoculum are briefly described. In addition, the paper underlines the opportunity of biofertilizers alone or in combination with chemical fertilizers. This review also, highlights the latest studies (until June 2019) and focuses on P-solubilization microorganisms mainly Actinobacteria. The biotechnology of these bacteria is a glimmer of hope for rock phosphate (RP) bioformulation. Since direct application of RP fertilizer is not always agronomically effective due to its sparse solubility.
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Affiliation(s)
- Abdoulaye Soumare
- AgroBioSciences Program, Mohammed VI Polytechnic University (UM6P), Benguerir, Morocco.,Université Cheikh Anta Diop, Laboratoire Commun de Microbiologie IRD/ISRA/UCAD, Centre de Recherche de Bel Air, Dakar, Senegal
| | - Kenza Boubekri
- AgroBioSciences Program, Mohammed VI Polytechnic University (UM6P), Benguerir, Morocco.,Faculté des Sciences Semlalia, Université Cadi Ayyad, Laboratoire of Microbial Biotechnologies, Agrosciences and Environment, Marrakesh, Morocco
| | - Karim Lyamlouli
- AgroBioSciences Program, Mohammed VI Polytechnic University (UM6P), Benguerir, Morocco
| | - Mohamed Hafidi
- AgroBioSciences Program, Mohammed VI Polytechnic University (UM6P), Benguerir, Morocco.,Faculté des Sciences Semlalia, Université Cadi Ayyad, Laboratoire of Microbial Biotechnologies, Agrosciences and Environment, Marrakesh, Morocco
| | - Yedir Ouhdouch
- AgroBioSciences Program, Mohammed VI Polytechnic University (UM6P), Benguerir, Morocco.,Faculté des Sciences Semlalia, Université Cadi Ayyad, Laboratoire of Microbial Biotechnologies, Agrosciences and Environment, Marrakesh, Morocco
| | - Lamfeddal Kouisni
- AgroBioSciences Program, Mohammed VI Polytechnic University (UM6P), Benguerir, Morocco
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Krishnen G, Kecskés ML, Rose MT, Geelan-Small P, Amprayn KO, Pereg L, Kennedy IR. Field monitoring of plant-growth-promoting rhizobacteria by colony immunoblotting. Can J Microbiol 2011; 57:914-22. [DOI: 10.1139/w11-059] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Inoculant plant-growth-promoting bacteria are emerging as an important component of sustainable agriculture. There is a need to develop inexpensive methods for enumerating these organisms after their application in the field, to better understand their survival and impacts on yields. Immunoblotting is one potential method to measure viable cells, but the high cost of the conventionally used nylon membranes makes this method prohibitive. In this study, less expensive alternative materials such as filter papers, glossy photo papers, and transparencies for the purpose of colony immunoblotting were evaluated and the best substance was chosen for further studies. Whatman filter paper No. 541 combined with a 0.01 mol·L–1 H2SO4 rinsing step gave similar results to nylon membranes but <20% of the overall cost of the original colony immunoblotting assay. The application of the modified immunoblot method was tested on nonsterile clay soil samples that were spiked with high numbers (>107 CFU·g–1) of the plant-growth-promoting bacteria Pseudomonas fluorescens , Azospirillum brasilense , or Rhizobium leguminosarum . The modified protocol allowed the identification and recovery of over 50% of the inoculated cells of all three strains, amidst a background of the native soil microflora. Subsequently, the survival of P. fluorescens was successfully monitored for several months after application to field-grown rice at Jerilderie, New South Wales, Australia, thus validating the procedure.
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Affiliation(s)
- Ganisan Krishnen
- SUNFix Centre for Nitrogen Fixation, Faculty of Agriculture, Food and Natural Resources, Biomedical Building, 1 Central Avenue, Eveleigh, The University of Sydney, New South Wales 2006, Australia
- Strategic Resources Research Centre, MARDI Head Quarters, 43400 Serdang, Selangor, Malaysia
| | - Mihály L. Kecskés
- SUNFix Centre for Nitrogen Fixation, Faculty of Agriculture, Food and Natural Resources, Biomedical Building, 1 Central Avenue, Eveleigh, The University of Sydney, New South Wales 2006, Australia
| | - Michael T. Rose
- SUNFix Centre for Nitrogen Fixation, Faculty of Agriculture, Food and Natural Resources, Biomedical Building, 1 Central Avenue, Eveleigh, The University of Sydney, New South Wales 2006, Australia
| | - Peter Geelan-Small
- SUNFix Centre for Nitrogen Fixation, Faculty of Agriculture, Food and Natural Resources, Biomedical Building, 1 Central Avenue, Eveleigh, The University of Sydney, New South Wales 2006, Australia
| | - Khanok-on Amprayn
- SUNFix Centre for Nitrogen Fixation, Faculty of Agriculture, Food and Natural Resources, Biomedical Building, 1 Central Avenue, Eveleigh, The University of Sydney, New South Wales 2006, Australia
| | - Lily Pereg
- School of Science and Technology, University of New England, Armidale New South Wales, Australia
| | - Ivan R. Kennedy
- SUNFix Centre for Nitrogen Fixation, Faculty of Agriculture, Food and Natural Resources, Biomedical Building, 1 Central Avenue, Eveleigh, The University of Sydney, New South Wales 2006, Australia
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