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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Mucilaginibacter gossypii sp. nov. and Mucilaginibacter gossypiicola sp. nov., plant-growth-promoting bacteria isolated from cotton rhizosphere soils
Munusamy Madhaiyan,Selvaraj Poonguzhali,Jung-Sook Lee,M. Senthilkumar,Keun Chul Lee,Subbiah Sundaram +5 more
TL;DR: Results of phenotypic, phylogenetic and genotypic analysis revealed that the strains were separated from the species of Mucilaginibacter described to date, and strains Gh-67(T) and Gh-48(T).
Journal ArticleDOI
The role of organic/bio–fertilizer amendment on aggregate stability and organic carbon content in different aggregate scales
Erdem Yilmaz,Mehmet Sönmez +1 more
TL;DR: In this article, the effects of different organic and bio-fertilizer (alone or in combination) applications on aggregate stability and organic carbon (OC) content in macro and micro aggregate sizes of clay loam (Typic Xerofluvent) textured soil were investigated.
Journal ArticleDOI
Re-addressing the biosafety issues of plant growth promoting rhizobacteria
Chetan Keswani,Om Prakash,Nidhi Bharti,Juan I. Vílchez,Estibaliz Sansinenea,Richard D. Lally,Rainer Borriss,Surya Pal Singh,Vijai Kumar Gupta,Leonardo Fernandes Fraceto,Renata de Lima,Harikesh Bahadur Singh +11 more
TL;DR: It is advised herein, that research and industrial laboratories developing biofertilizers for commercialization or environmental release must characterize microorganisms of interest using a multilateral polyphasic approach of microbial systematics.
Journal ArticleDOI
Salt-tolerant and plant growth-promoting bacteria isolated from Zn/Cd contaminated soil: identification and effect on rice under saline conditions
Woranan Nakbanpote,Natthawoot Panitlurtumpai,Aphidech Sangdee,Narongrit Sakulpone,Pawinee Sirisom,Apinya Pimthong +5 more
TL;DR: An unexpected effect of Pseudomonas sp.
Journal ArticleDOI
Evaluating the efficacy of cyanobacterial formulations and biofilmed inoculants for leguminous crops
Radha Prasanna,Sodimalla Triveni,Ngangom Bidyarani,Santosh Babu,Kuldeep Yadav,Anurup Adak,Sangeeta Khetarpal,Madan Pal,Yashbir Singh Shivay,Anil Kumar Saxena +9 more
TL;DR: The promise of cyanobacterial inoculants and biofilmed biofertilizers as promising inputs for integrated nutrient management strategies in agriculture is highlighted.
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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