Journal ArticleDOI
Plant growth promoting rhizobacteria as biofertilizers
TLDR
This review focuses on the known, the putative, and the speculative modes-of-action of PGPR, which include fixing N2, increasing the availability of nutrients in the rhizosphere, positively influencing root growth and morphology, and promoting other beneficial plant–microbe symbioses.Abstract:
Numerous species of soil bacteria which flourish in the rhizosphere of plants, but which may grow in, on, or around plant tissues, stimulate plant growth by a plethora of mechanisms. These bacteria are collectively known as PGPR (plant growth promoting rhizobacteria). The search for PGPR and investigation of their modes of action are increasing at a rapid pace as efforts are made to exploit them commercially as biofertilizers. After an initial clarification of the term biofertilizers and the nature of associations between PGPR and plants (i.e., endophytic versus rhizospheric), this review focuses on the known, the putative, and the speculative modes-of-action of PGPR. These modes of action include fixing N2, increasing the availability of nutrients in the rhizosphere, positively influencing root growth and morphology, and promoting other beneficial plant–microbe symbioses. The combination of these modes of actions in PGPR is also addressed, as well as the challenges facing the more widespread utilization of PGPR as biofertilizers.read more
Citations
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Journal ArticleDOI
Players over the Surface: Unraveling the Role of Exopolysaccharides in Zinc Biosorption by Fluorescent Pseudomonas Strain Psd.
TL;DR: It is identified that alginates are the prime components contributing to Zn2+ biosorption, and the increased alginate production in response to ZN2+ exposure leads to improved biofilm formation by the strain.
Journal ArticleDOI
Bio-preparates support the productivity of potato plants grown under desert farming conditions of north Sinai: Five years of field trials.
Mohammed T. Abbas,Mervat A. Hamza,Hanan H. Youssef,Gehan H. Youssef,Mohamed Fayez,Mohamed Monib,Nabil A. Hegazi +6 more
TL;DR: The response of open-field potatoes to the application of RMO bio-preparates, the biofertilizer “Biofertile” and the bioagent “Biocontrol”, were experimented over 5 successive years under N-hunger of north Sinai desert soils.
Book ChapterDOI
Perspectives of Plant Growth Promoting Rhizobacteria in Growth Enhancement and Sustainable Production of Tomato
TL;DR: In this paper, the authors used microbial inoculation especially those consisting of plant growth-promoting rhizobacteria (PGPR) to replace chemical fertilizers/pesticides.
Journal ArticleDOI
Culturable Yeasts as Biofertilizers and Biopesticides for a Sustainable Agriculture: A Comprehensive Review
TL;DR: In this paper, the authors highlight the application of Yeasts as biological agents in different sectors of sustainable agricultural practices through direct or indirect mechanisms of action, such as the ability of yeasts to provide soluble nutrients to plants, produce organic acids and phytohormones (indole-3-acetic acid), and as soil bioremediating agents.
Journal ArticleDOI
Isolation and biochemical characterization of Plant Growth Promoting (PGP) bacteria colonizing the rhizosphere of Tef crop during the seedling stage
Zerihun Tsegaye,Birhanu Gizaw,Genene Tefera,Adey Feleke,Solomon Chaniyalew,Tesfaye Alemu,Fasil Assefa +6 more
TL;DR: PGPR can be used as biofertilizers as well as biocontrol agents to replace agrochemicals to improve crop productivity and hence these species can be further formulated and used for greenhouse and fi eld applications.
References
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Journal ArticleDOI
Phosphate solubilizing bacteria and their role in plant growth promotion
Hilda Rodríguez,Reynaldo Fraga +1 more
TL;DR: Genetic manipulation of phosphate-solubilizing bacteria to improve their ability to improve plant growth may include cloning genes involved in both mineral and organic phosphate solubilization, followed by their expression in selected rhizobacterial strains.
Journal ArticleDOI
The enhancement of plant growth by free-living bacteria
TL;DR: The ways in which plant growth promoting rhizobacteria facilitate the growth of plants are considered and discussed and the possibility of improving plant growth promotion by specific genetic manipulation is critically examined.
Journal ArticleDOI
Microbial interactions and biocontrol in the rhizosphere
TL;DR: Multiple microbial interactions involving bacteria and fungi in the rhizosphere are shown to provide enhanced biocontrol in many cases in comparison with biocOntrol agents used singly.
Journal ArticleDOI
Soil Fertility and Fertilizers
TL;DR: Soil fertility and fertilizers, Soil fertility, fertilizers and soil fertility and fertility, this paper, soil fertility, soil fertility, fertility, and fertilization, etc.
Journal ArticleDOI
A Model For the Lowering of Plant Ethylene Concentrations by Plant Growth-promoting Bacteria
TL;DR: It is argued that the simplest explanation for the observed biological activity of plant growth promoting rhizobacteria relates to the relative amounts of 1-aminocyclopropane-1-carboxylate deaminase and 1-amino-2-car boxylate oxidase in the system under consideration.
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