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
Diversity and Efficiency of Rhizobia Communities from Iron Mining Areas Using Cowpea as a Trap Plant
Jordana Luísa de Castro,Mariana Gonçalves Souza,Márcia Rufini,Amanda Azarias Guimarães,Tainara Louzada Rodrigues,Fatima Maria de Souza Moreira +5 more
TL;DR: The objective of this study was to evaluate the diversity and efficiency of symbiotic nitrogen fixing bacterial communities in soils under different types of vegetation in the Quadrilatero Ferrifero: ironstone outcrops, Atlantic Forest, neotropical savanna, and a rehabilitated area revegetated with grass.
Journal ArticleDOI
Plant-Growth-Promoting Rhizobacteria Emerging as an Effective Bioinoculant to Improve the Growth, Production, and Stress Tolerance of Vegetable Crops.
Manoj Kumar,Ved Prakash Giri,Shipra Pandey,Anmol Gupta,Manish Kumar Patel,Atal Bihari Bajpai,Sasha N. Jenkins,Kadambot H. M. Siddique +7 more
TL;DR: In this article, the role of plant growth-promoting rhizobacteria (PGPR) in vegetable crop growth and resistance to adverse effects arising from various abiotic (drought, salinity, heat, heavy metals) and biotic (fungi, bacteria, nematodes, and insect pests) stresses is discussed.
Journal ArticleDOI
Characterization of the cultivable bacterial populations associated with field grown Brassica napus L.: an evaluation of sampling and isolation protocols
TL;DR: It was striking that all replicates and thus the whole plant contained Pseudomonas and Bacillus strains although aboveground and belowground plant tissues differed in most dominant bacterial genera and characteristics.
Journal ArticleDOI
Pseudomonas PS01 Isolated from Maize Rhizosphere Alters Root System Architecture and Promotes Plant Growth
Thanh Nguyen Chu,Thanh Nguyen Chu,Le Van Bui,Le Van Bui,Minh Thi Thanh Hoang,Minh Thi Thanh Hoang +5 more
TL;DR: The results suggest that PS01 is a potential candidate to be used as bio-fertilizer agent for enhancing plant growth and the plant-growth promoting effects of PS01 might be independent of bacterial auxin and could be caused by a combination of different diffusible compounds and volatile organic compounds (VOCs).
Journal ArticleDOI
Bacillus vallismortis EXTN-1-Mediated Growth Promotion and DiseaseSuppression in Rice
TL;DR: In this paper, Bacillus vallismortis EXTN-1, a biocontrol agent in cucumber, tomato and potato was tested in rice pathosystem against rice fungal pathogens viz. Magnaporthe grisea, Rhizoctonia solani and Cochliobolus miyabeanus.
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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