Some characteristics of phosphate solubilizing rhizobacteria as an ecological strategy for sustainable agriculture

Aarab, Saida; Ollero, Javier; Megı́as, Manuel; Laglaoui, Amin; Bakkali, Mohammed; Arakrak, Abdelhay

doi:10.1016/j.matpr.2019.04.091

Cited by 8 publications

(3 citation statements)

References 18 publications

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“…Various authors have reported different bacterial genera, e.g. Pseudomonas, Serratia and Enterobacter, as citric-, lactic-, succinic-, gluconic-, oxalic-, glutamic-, and pyruvic-acid producers, among others Krishnaraj and Dahale (2014); Valetti et al (2018); Aarab et al (2019); Mardad et al (2014). The Kosakonia genus has been scarcely reported as a phosphate solubilizer.…”

Section: Phosphate Solubilizing Bacteria Selection and Identificationmentioning

confidence: 99%

Bioinoculant production composed by Pseudomonas sp., Serratia sp., and Kosakonia sp., preliminary effect on Allium cepa L., growth at plot scale

et al. 2021

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Phosphorus (P) is an essential nutrient for plant’s development, and its deficiency restricts crop yield. To meet P requirements in agricultural settings, a low-cost culture medium (MT11B) was designed in which a bioinoculant was produced consisting of three bacterial isolates capable of solubilizing P from phosphoric rock (PR). Pseudomonas sp., Serratia sp., and Kosakonia sp. exhibited P solubilization in SMRS1 agar modified with PR (5.0 g L-1), as source of inorganic P. Sowings by isolation were made of the three bacteria on DNAse- and Blood-agar to rule out pathogenicity. At the interaction tests, no inhibition halos were observed; demonstrating there was no antagonism among them, thus they were used to constitute a consortium. Growth curve (12 h) in MT11B demonstrated consortium grew in presence of PR, brewer’s yeast hydrolysate, and glucose at concentrations (2.5 g L-1) fourfold lower than those in SMRS1 (10.0 g L-1); obtaining phosphate solubilizing bacteria of (10.60 ± 0.08/ log10 CFUmL-1 and, at 6 h of culture, acid and alkaline phosphatase enzyme volumetric activities of 2.3 ± 0.8 and (3.80 ± 0.13) UP, respectively. The consortium, releasing phosphorus at a rate of (45.80 ± 5.17) mg L-1 at 6 h of production, was evaluated as bioinoculant in onion plots for five months. Plants receiving a treatment that included 500 mL (10 x 107 CFU mL-1) of bioinoculant plus 100 kg ha-1 of an organic mineral fertilizer exhibited the highest determined response variables (170.1 ± 22.2) mm bulb height, (49.4 ± 6.5) mm bulb diameter, (9.0 ± 1.8) g bulb dry weight, and 15.21 mg bulb-1 total phosphorus (p < 0.05).

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Section: Phosphate Solubilizing Bacteria Selection and Identificationmentioning

confidence: 99%

Bioinoculant production composed by Pseudomonas sp., Serratia sp., and Kosakonia sp., preliminary effect on Allium cepa L., growth at plot scale

et al. 2021

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“…HCN can be produced by a wide variety of bacteria [29], including Bacillus and Pseudomonas species. The ability of bacteria to produce HCN is very useful in preventing the spread of fungal infections, which aids in the development of new plants [132]. PGPR-produced For example, HCN helps with metal chelation and geochemical processes in the substrate as a biocontrol factor against phytopathogens.…”

Section: Volatile Organic Compounds (Vocs)mentioning

confidence: 99%

Leveraging Plant Growth Promoting Rhizobacteria for Sustainable Agriculture and Environment: An Overview

Jain

Singh²

2023

AJB2T

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The term ''soil health'' refers to specific qualities of soil that allow it to support crop growth and productivity over time without harming the environment. Healthy soil contains abundant microorganisms, including plant growth promoting rhizobacteria (PGPR), which perform various beneficial functions in the rhizosphere. PGPR aid in nutrient cycling and uptake prevents the growth of harmful plant pathogens, stimulates plant immunity, and directly enhances plant growth by producing phytohormones and other compounds. They also can clean up soil pollution through bioremediation. This article overviews examines literature on how PGPR contributes to maintaining soil health and reducing the need for toxic agrochemicals. Ultimately, the goal is to promote more sustainable agriculture practices using PGPR as biocontrol agents, plant growth stimulators, and rhizoremediators.

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“…These bacteria have ability to produce low molecular weight organic acids in the rhizosphere such as acetic, citric, gluconic, lactic, succinic, propionic and oxalic acids, that well-recognized and widely accepted approach as principal mechanism for P-solubilization (Trivedi & Sa, 2008;Khan et al, 2014;Billah et al, 2019). Also, PSB can facilitate growth and increased of different plants via changing the concentration of plant growth promoting like substances such as indoleacetic acid (IAA), synthesizing siderophores, asymbiotic N 2 fixation, biocontrol activity, produce antibiotics and cyanide, synthesizing 1-aminocyclopropane-1-carboxylate (ACC) deaminase that can modulate plant ethylene levels and helping in bioremediation process (Abd El-Azeem et al, 2007;Poonguzhali et al, 2008;Aarab et al, 2019). Several works have shown that the strains Bacillus subtilis, Serratia marcescens and Pseudomonas fluorescens used as bacterial inoculants to enhance the growth of plants through at least one mechanism; production of IAA, siderophores, antifungal activity, HCN and ACC deaminase (Singh et al, 2008;Selvakumar et al, 2008;Shaharoona et al, 2008).…”

Section: Egyptian Journal Of Microbiologymentioning

confidence: 99%

Effects of Phosphate Solubilizing Microorganisms on Wheat Yield and Phosphatase Activity

El-Deen¹,

El-Azeem²,

Elwahab³

et al. 2020

Egypt. J. Microbiol.

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HOSPHATE solubilizing capacity of four strains, Pseudomonas fluorescence, Bacillus megaterium, Serratia marcescens, and Bacillus subtilis was assessed in liquid National Botanical Research Institute's phosphate medium containing rock phosphate (RP). A greenhouse pot experiment was conducted to evaluate the effects of inoculation with arbuscular mycorrhizal (AM) fungi alone or in combination with each strain with and without RP on wheat (Triticum aestivum Gemeza-9) growth, yield, nutrient uptake and the activity of alkaline phosphatase. The amounts of P released from RP by bacterial strains ranged from 0.22 to 80.8mg P L-1 and the pH values of the cultures were reduced from initial value of 7.3 to values varied between 4.04 and 6.62. The results indicated that B. subtilis was the most effective strain in solubilizing RP in liquid culture. The combined inoculation with bacterial strains and AM fungi led to a significant increase in soil P content and alkaline phosphatase activity compared with both the non-inoculated and the individually inoculated soil, and this increase was much higher after 69 days comparing with those after 130 days. In RP-amended soil, B. subtilis and P. fluorescence were more effective in increasing NPK uptake of wheat straw and grains compared with S. marcescens and B. megaterium when inoculated with AM fungi. This study is concluded that the combined inoculation plus RP gave better results for wheat grown in sandy soil. Further researches are required to estimate this study under field conditions and different soils to give reliable results.

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Some characteristics of phosphate solubilizing rhizobacteria as an ecological strategy for sustainable agriculture

Cited by 8 publications

References 18 publications

Bioinoculant production composed by Pseudomonas sp., Serratia sp., and Kosakonia sp., preliminary effect on Allium cepa L., growth at plot scale

Bioinoculant production composed by Pseudomonas sp., Serratia sp., and Kosakonia sp., preliminary effect on Allium cepa L., growth at plot scale

Leveraging Plant Growth Promoting Rhizobacteria for Sustainable Agriculture and Environment: An Overview

Effects of Phosphate Solubilizing Microorganisms on Wheat Yield and Phosphatase Activity

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