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
The rhizosphere microbiome and plant health
TL;DR: In this article, the authors discuss evidence that upon pathogen or insect attack, plants are able to recruit protective microorganisms, and enhance microbial activity to suppress pathogens in the rhizosphere.
Journal ArticleDOI
Biological control of soil-borne pathogens by fluorescent pseudomonads
Dieter Haas,Geneviève Défago +1 more
TL;DR: Biocontrol strains of fluorescent pseudomonads produce antifungal antibiotics, elicit induced systemic resistance in the host plant or interfere specifically with fungal pathogenicity factors during root colonization.
Journal ArticleDOI
Plant growth-promoting rhizobacteria (PGPR): emergence in agriculture
TL;DR: The progress to date in using the rhizosphere bacteria in a variety of applications related to agricultural improvement along with their mechanism of action with special reference to plant growth-promoting traits are summarized and discussed in this review.
Journal ArticleDOI
The rhizosphere microbiome: significance of plant beneficial, plant pathogenic, and human pathogenic microorganisms
TL;DR: The main functions of rhizosphere microorganisms and how they impact on health and disease are reviewed and several strategies to redirect or reshape the rhizospheric microbiome in favor of microorganisms that are beneficial to plant growth and health are highlighted.
Journal ArticleDOI
Mechanisms and applications of plant growth promoting rhizobacteria: Current perspective
TL;DR: The latest paradigms of applicability of these beneficial rhizobacteria in different agro-ecosystems have been presented comprehensively under both normal and stress conditions to highlight the recent trends with the aim to develop future insights.
References
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Journal ArticleDOI
Mechanism of Calcium and Phosphate Release from Hydroxy-Apatite by Mycorrhizal Hyphae
TL;DR: The role of vesicular-arbuscular mycorrhiza (VAM) in facilitating the uptake of sparingly soluble nutrients from the soil has been well documented as mentioned in this paper.
Journal ArticleDOI
Growth and nutrition of nodulated mycorrhizal and non-mycorrhizal Hedysarum coronarium as a result of treatment with fractions from a plant growth-promoting rhizobacteria
TL;DR: Investigation of the effect of components from a plant growth-promoting rhizobacterium (PGPR) or phytohormones on the growth and nutrient assimilation of a legume with N 2 -fixing Rhizobium shows that components from the PGPR culture behaved similarly in increasing growth in non-mycorrhizal plants irrespective of time of treatment.
Journal ArticleDOI
Contribution of BNF by Azoarcus sp. BH72 in Sorghum vulgare
TL;DR: Sorghum vulgare cv.
Journal ArticleDOI
Biological activity and colonization pattern of the bioluminescence-labeled plant growth-promoting bacterium Kluyvera ascorbata SUD165/26
TL;DR: To develop a better understanding of the functioning of K. ascorbata SUD165/26 in the environment, and to trace its distribution in the rhizosphere, isolates of this bacterium were labeled with either green fluorescent protein or luciferase.
Book ChapterDOI
Nitrogen fixation in para-nodules of wheat roots by introduced free-living diazotrophs
TL;DR: Nitrogen-fixation (C2H2-reduction) was demonstrated in wheat root nodules (p-nodules) induced by 2,4-dichlorophenoxyacetate and inoculated with A. brasilense and it was shown that the host plant was able to supply the necessary substrate required for the bacterial N2-fixated within thep- nodules.
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