Review Article Silicate Bacteria as a Biofertilizer

Afify, Aida

doi:10.21608/jacb.2022.154996.1029

Cited by 4 publications

(3 citation statements)

References 11 publications

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“…Finally, several genera of bacteria are essential part for weathering silicate minerals namely biological agents. These bacteria referred as " silicate bacteria" have the ability to decompose aluminosilicate minerals to increase silicate elements (potassium, silicon and aluminum) in an available forms for plant nutrition (Afify, 2022).…”

Section: Silicate Bacteriamentioning

confidence: 99%

Mini Review: Silicate Bacteria and Plant Diseases

Ashour

Afify²

2023

Journal of Agricultural Chemistry and Biotechnology

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Silicate bacteria were identified for fertility management and in this review as biological control in soil. The main source of silica in soil are the silicate minerals. However, monosilicic acid is the only soluble form of silicon for plant absorbation. This acid (monosilicic acid) can be produced by several ways such as rockweathering mostly of these ways depends on microbial activities namely silicate solubilizing bacteria (SSB). The present work discussed silicate solubilizing bacteria as a very important factor in this scale and commonly used in plant diseases. The very important role of silicate bacteria is converting insoluble forms of silicates minerals to soluble ones. Furthermore, silicate bacteria can also solubilize other beneficial element for plant such as potassium. Potassium element enhances plant defense mechanisms against phytopathogens and hence increase soil fertility to develope growth of plants. Silicate bacteria enhance resistance against several soil borne fungi with supplementation of silicon which inhibits many plant-pathogen systems and protects plants against pathogens. By producing bacterial metabolites such as organic acids and the antagonistic activity of this bacteria against the pathogens the silicate bacteria can protect the plants. Thus, the silicate-mediated can affect bioavailability of silicon by decreasing doses of pesticide use, sustainable agriculture and developed health of plant.

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Section: Silicate Bacteriamentioning

confidence: 99%

Mini Review: Silicate Bacteria and Plant Diseases

Ashour

Afify²

2023

Journal of Agricultural Chemistry and Biotechnology

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“…Dept., Fac. Agric., Mansoura Univ., Mansoura, Egypt as Pseudomonas fluorescens, Bacillus subtilis, Proteus mirabilis and Bacillus circulans (Afify, 2022). For studying their cultural characteristics, agar medium supplemented with biotite as a source of silicate was used according to Aleksandrov and Ternovs'ka (1961).…”

Section: Source Of Silicate Bacteriamentioning

confidence: 99%

“…Silicon (Si) promotes the growth and development of several crops (Afify, 1982(Afify, & 2022 and has been reported to reduce the incidence of many fungal diseases in different pathosystems by strengthening the cell walls, particularly the outer membrane of epidermal cells in leaves, thereby increasing resistance to the penetration of pathogenic fungi (Carver, et al, 1987;Francois, et al, 2005). Silicon remains in insoluble form unless solubilized by weathering action of minerals or biological activity of plant roots and microorganisms.…”

Section: Introductionmentioning

confidence: 99%

Biological control of two pathogenic fungi by silicate bacteria

Afify

Ashour²

2022

Journal of Agricultural Chemistry and Biotechnology

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Silicate solubilizing bacteria (SSB) play a critical role in soil fertility by utilizing available forms of silicates minerals. Furthermore, SSB can also enhance plant defense mechanisms. Distribution of rhizobacteria in fields had been cultivated with flax and wheat which, are high silicate accumulators, and screened for available silicate on a selective medium, the bacterial counts varied markedly with a type of plantation in soil. Four bacterial strains were capable of solubilizing biotite (source of silicate mineral): Pseudomonas fluorescens, Bacillus subtilis, Proteus mirabilis, and Bacillus circulans. By using dual culture antagonistic assays were carried out on these bacteria versus two pathogens fungi (Fusarium oxysporum and Rhizoctonia solani). The inhibition zone of these bacteria against two pathogenic fungi ranged 10 to 33 mm. The maximum inhibition zone by bacterial strains was shown by the strain B. subtilis followed by Ps. fluorescens. When detected the antagonistic metabolites, siderophores were produced by Ps. fluorescens and B. subtilis also these two strains with B. criculans produced chitinase. Only Proteus mirabilis produced hydrogen cyanide. The SSB strains showed different levels of efficiency in increasing the survival of flax seedlings however, two bacterial strains (B. subtilis & Ps. fluorescens) showed maximum efficiency under glasshouse conditions compared with the control. Finally, the strong action of silicate bacteria is very important in the development of bio fungicides against fungal pathogens.

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A comprehensive overview of eco-friendly bio-fertilizers extracted from living organisms

Ammar,

Rady,

Khattab

et al. 2023

Environ Sci Pollut Res

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Currently, sustainable agriculture involves ecofriendly techniques, which include biofertilization. Biofertilizers increase plant productivity by improving soil fertility and nutrient content. A wide range of living organisms can be applied as biofertilizers and increase soil fertility without causing pollution due to their biodegradability. The organisms can be microorganisms like bacteria, microalgae, and micro fungi or macro organisms like macroalgae, macro fungi, and higher plants. Biofertilizers extracted from living organisms or their residues will be increasingly used rather than chemical fertilizers, which cause heavy metal accumulation in soil. Biofertilizer use aims for sustainable development in agriculture by maintaining the soil. This will mitigate climate change and related impacts and will also lower many serious diseases resulting from pollution such as cancer, liver and renal failure, and immune diseases. This review is a comprehensive overview of biofertilizers extracted from a range of living organisms from the Kingdoms Monera to Plantae and included bacteria, algae, fungi, and higher plants. Organisms that play a vital role in elevating soil nutrients in a safe, cheap, and ecofriendly manner are included in the review to promote their potential commercial application.

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Review Article Silicate Bacteria as a Biofertilizer

Cited by 4 publications

References 11 publications

Mini Review: Silicate Bacteria and Plant Diseases

Mini Review: Silicate Bacteria and Plant Diseases

Biological control of two pathogenic fungi by silicate bacteria

A comprehensive overview of eco-friendly bio-fertilizers extracted from living organisms

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