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
Use of Plant Growth-Promoting Rhizobacteria in Maize and Sugarcane: Characteristics and Applications
Roberta Mendes dos Santos,Paola Andrea Escobar Diaz,Laiana Lana Bentes Lobo,Everlon Cid Rigobelo +3 more
TL;DR: The present review is an effort to elucidate the concept of rhizobacteria in the current scenario and their underlying mechanisms of plant growth promotion with recent updates to garner broad perspectives regarding their functioning and applicability.
Journal ArticleDOI
Beneficial role of endophytes in biofortification of Zn in wheat genotypes varying in nutrient use efficiency grown in soils sufficient and deficient in Zn
Devendra Singh,Mahendra Vikram Singh Rajawat,Rajeev Kaushik,Radha Prasanna,Anil Kumar Saxena +4 more
TL;DR: Zn solubilizing endophytes can enhance the translocation and enrichment of Zn to grains in wheat genotypes, irrespective of their different nutrient use efficiency (Zn), and can be integrated into the modern strategies for biofortification.
Journal ArticleDOI
Effects of biofertilizer produced from bradyrhizobium and streptomyces griseoflavus on plant growth, nodulation, nitrogen fixation, nutrient uptake, and Seed Yield of Mung Bean, Cowpea, and Soybean
TL;DR: Bradyrhizobium japonicum SAY3-7 plus Bradyrh Izobium elkanii BLY3-8 and Streptomyces griseoflavus are effective bacteria that can be used together as biofertilizer for the production of economically important leguminous crops, especially soybean and mung bean.
Book ChapterDOI
Role of Rhizosphere Microflora in Potassium Solubilization
TL;DR: The main source of K+ for plant is soil which is taken up by the plant roots through the epidermal and cortical cells and transported to the shoot and distributed to the leaves.
Journal ArticleDOI
The Use of Microalgae and Cyanobacteria in the Improvement of Agricultural Practices: A Review on Their Biofertilising, Biostimulating and Biopesticide Roles
TL;DR: This manuscript highlights the potential of microalgae and cyanobacteria in the improvement of agricultural practices, presenting how these photosynthetic microorganisms interact with higher plants; the main bioactive compounds that can be isolated from microalgal and cyanOBacteria; and how they can influence plants’ growth at different levels.
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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