The Attractive<i>Serratia plymuthica</i>BMA1 Strain With High Rock Phosphate-Solubilizing Activity and Its Effect on the Growth and Phosphorus Uptake by<i>Vicia faba</i>L. Plants

Borgi, Mohamed Ali; Saidi, Issam; Moula, Amel; Rhimi, Sofien; Rhimi, Moez

doi:10.1080/01490451.2020.1716892

Cited by 28 publications

(13 citation statements)

References 59 publications

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“…Newly isolated strain Serratia plymuthic BMA1 solubilized 450 mg L − 1 phosphorus and improved dry weight by 76% in inoculated Vicia faba L. plants, compared to uninoculated plants. The phosphorus content in roots and shoots was threefold higher in treated plants in comparison to control plants (Borgi et al 2020). The consortium of phosphobacteria (Klebsiella sp.…”

Section: Phosphate-solubilizing Microorganisms (Psms)mentioning

confidence: 90%

Phosphate-Solubilizing Microorganisms: Mechanism and Their Role in Phosphate Solubilization and Uptake

Rawat

Das

Shankhdhar

et al. 2020

J Soil Sci Plant Nutr

338

130

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Phosphorus is the second most critical macronutrient after nitrogen required for metabolism, growth, and development of plants. Despite the abundance of phosphorus in both organic and inorganic forms in the soil, it is mostly unavailable for plant uptake due to its complexation with metal ions in the soil. The use of agrochemicals to satisfy the demand for phosphorus to improve crop yield has led to the deterioration of the ecosystem and soil health, as well as an imbalance in the soil microbiota. Consequently, there is a demand for an alternate cost-effective and eco-friendly strategy for the biofortification of phosphorus. One such strategy is the application of phosphate-solubilizing microorganisms which can solubilize insoluble phosphates in soil by different mechanisms like secretion of organic acids, enzyme production, and excretion of siderophores that can chelate the metal ions and form complexes, making phosphates available for plant uptake. These microbes not only solubilize phosphates but also promote plant growth and crop yield by producing plant-growth-promoting hormones like auxins, gibberellins, and cytokinins, antibiosis against pathogens, 1-aminocyclopropane-1-carboxylic acid deaminase which enhances plant growth under stress conditions, improving plant resistance to heavy metal toxicity, and so on. Pyrroloquinoline quinine (pqq) and glucose dehydrogenase (gcd) are the representative genes for phosphorus solubilization in microorganisms. The content presented in this review paper focuses on different mechanisms and modes of action of phosphate-solubilizing microorganisms, their contribution to phosphorus solubilization, growth-promoting attributes in plants, and the molecular aspects of phosphorus solubilization.

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Section: Phosphate-solubilizing Microorganisms (Psms)mentioning

confidence: 90%

Phosphate-Solubilizing Microorganisms: Mechanism and Their Role in Phosphate Solubilization and Uptake

Rawat

Das

Shankhdhar

et al. 2020

J Soil Sci Plant Nutr

338

130

View full text Add to dashboard Cite

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“…Furthermore, and in corroboration with results from other studies, Serratia strain ECCN 24b was able to solubilise insoluble phosphate [60,61] and potassium [62]. Recent studies have shown that the mineral-solubilising activity for promotion of plant growth is typically associated with the production of organic acids which, for strains of Serratia spp., appears to include gluconic and lactic acid [63].…”

Section: Discussionmentioning

confidence: 99%

Coal-Degrading Bacteria Display Characteristics Typical of Plant Growth Promoting Rhizobacteria

et al. 2020

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Coal mining produces large quantities of discard that is stockpiled in large dumps. This stockpiled material, termed coal discard, poses an environmental threat emphasising the need for appropriate bioremediation. Here, metagenomic analysis of the 16S rRNA from ten coal-degrading strains previously isolated from coal slurry from discard dumps and from the rhizosphere of diesel-contaminated sites was used to establish genetic relatedness to known plant growth-promoting (PGP) bacteria in the NCBI database. Measurement of indole and ammonium production and solubilisation of P and K were used to screen bacteria for PGP characteristics. BLAST analysis revealed ≥ 99% homology of six isolates with reference PGP strains of Bacillus, Escherichia, Citrobacter, Serratia, Exiguobacterium and Microbacterium, while two strains showed 94% and 91% homology with Proteus. The most competent PGP strains were Proteus strain ECCN 20b, Proteus strain ECCN 23b and Serratia strain ECCN 24b isolated from diesel-contaminated soil. In response to L-trp supplementation, the concentration of indolic compounds (measured as indole-3-acetic acid) increased. Production of ammonium and solubilisation of insoluble P by these strains was also apparent. Only Serratia strain ECCN 24b was capable of solubilising insoluble K. Production of indoles increased following exposure to increasing aliquots of coal discard, suggesting no negative effect of this material on indole production by these coal-degrading bacterial isolates and that these bacteria may indeed possess PGP characteristics.

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“…Oxalic, lactic, malic, citric, and succinic acids [20] Serratia plymuthica Soils Gluconic acid [187] Bacillus, Burkholderia, Paenibacillus sp. Paddy field Gluconic oxalic, citric, tartaric, succinic, formic and acetic acid [188] Pantoea, Pseudomonas, Serratia, and Enterobacter Wheat rhizosphere Oxalic, citric, gluconic succinic, and fumaric acids [189] Bacilli strains Wheat rhizospheres and rock phosphate mine Gluconic, lactic, citric, malic, succinic and propionic acids [190] Pseudomonas sp.…”

Section: Soils From High Altitudes In Indian Himalayasmentioning

confidence: 99%

Psychrophilic Bacterial Phosphate-Biofertilizers: A Novel Extremophile for Sustainable Crop Production under Cold Environment

et al. 2021

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Abiotic stresses, including low-temperature environments, adversely affect the structure, composition, and physiological activities of soil microbiomes. Also, low temperatures disturb physiological and metabolic processes, leading to major crop losses worldwide. Extreme cold temperature habitats are, however, an interesting source of psychrophilic and psychrotolerant phosphate solubilizing bacteria (PSB) that can ameliorate the low-temperature conditions while maintaining their physiological activities. The production of antifreeze proteins and expression of stress-induced genes at low temperatures favors the survival of such organisms during cold stress. The ability to facilitate plant growth by supplying a major plant nutrient, phosphorus, in P-deficient soil is one of the novel functional properties of cold-tolerant PSB. By contrast, plants growing under stress conditions require cold-tolerant rhizosphere bacteria to enhance their performance. To this end, the use of psychrophilic PSB formulations has been found effective in yield optimization under temperature-stressed conditions. Most of the research has been done on microbial P biofertilizers impacting plant growth under normal cultivation practices but little attention has been paid to the plant growth-promoting activities of cold-tolerant PSB on crops growing in low-temperature environments. This scientific gap formed the basis of the present manuscript and explains the rationale for the introduction of cold-tolerant PSB in competitive agronomic practices, including the mechanism of solubilization/mineralization, release of biosensor active biomolecules, molecular engineering of PSB for increasing both P solubilizing/mineralizing efficiency, and host range. The impact of extreme cold on the physiological activities of plants and how plants overcome such stresses is discussed briefly. It is time to enlarge the prospects of psychrophilic/psychrotolerant phosphate biofertilizers and take advantage of their precious, fundamental, and economical but enormous plant growth augmenting potential to ameliorate stress and facilitate crop production to satisfy the food demands of frighteningly growing human populations. The production and application of cold-tolerant P-biofertilizers will recuperate sustainable agriculture in cold adaptive agrosystems.

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The AttractiveSerratia plymuthicaBMA1 Strain With High Rock Phosphate-Solubilizing Activity and Its Effect on the Growth and Phosphorus Uptake byVicia fabaL. Plants

Cited by 28 publications

References 59 publications

Phosphate-Solubilizing Microorganisms: Mechanism and Their Role in Phosphate Solubilization and Uptake

Phosphate-Solubilizing Microorganisms: Mechanism and Their Role in Phosphate Solubilization and Uptake

Coal-Degrading Bacteria Display Characteristics Typical of Plant Growth Promoting Rhizobacteria

Psychrophilic Bacterial Phosphate-Biofertilizers: A Novel Extremophile for Sustainable Crop Production under Cold Environment

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