Spirulina platensis-Polysaccharides Promoted Green Silver Nanoparticles Production Using Gamma Radiation to Suppress the Expansion of Pear Fire Blight-Producing Erwinia amylovora

“…The important role of proteins present in the S. platensis extract for the synthesis of Ag NPs was investigated by Ameen et al [42]. In addition to polysaccharides from S. platensis extract, Attia et al utilized gamma radiation to synthesize Ag NPs [43]. The product was successfully used against Erwinia amylovora, Gram-negative bacteria, which caused fire blight infection on trees.…”

Section: Plos Onementioning

confidence: 99%

Characterization of nanomaterials synthesized from Spirulina platensis extract and their potential antifungal activity

et al. 2022

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Nowadays, fungal infections increase, and the demand of novel antifungal agents is constantly rising. In the present study, silver, titanium dioxide, cobalt (II) hydroxide and cobalt (II,III) oxide nanomaterials have been synthesized from Spirulina platensis extract. The synthesis mechanism has been studied using GCMS and FTIR thus confirming the involvement of secondary metabolites, mainly amines. The obtained products have been analysed using XRD, SEM, TGA and zeta potential techniques. The findings revealed average crystallite size of 15.22 nm with 9.72 nm for oval-shaped silver nanoparticles increasing to 26.01 nm and 24.86 nm after calcination and 4.81 nm for spherical-shaped titanium dioxide nanoparticles which decreased to 4.62 nm after calcination. Nanoflake shape has been observed for cobalt hydroxide nanomaterials and for cobalt (II, III) oxide with crystallite size of 3.52 nm and 13.28 nm, respectively. Silver nanoparticles showed the best thermal and water dispersion stability of all the prepared structures. Once subjected to three different Candida species (C. albicans, C. glabrata, and C. krusei) silver nanoparticles and cobalt (II) hydroxide nanomaterials showed strong antifungal activity at 50 μg/mL with minimum inhibitory concentration (MIC) values. After light exposition, MIC values for nanomaterials decreased (to 12.5 μg/mL) for C. krusei and increased (100 μg/mL) for C. albicans and C. glabrata.

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“…The intensity of the red color constructed was fitting to the power of the prepared GSH to biosynthesize Se NPs (El-Sayyad et al 2020). Usually, surface plasmon resonance (SPR) is influenced by the intensity, dimension, morphological surfaces, structure and dielectric manners of the synthesized Se NPs 0.014 ± 0.001c 0.017 ± 0.003c 0.033 ± 0.005d 0.007 ± 0.002d WW 0.305 ± 0.003a 0.360 ± 0.007a 0.401 ± 0.008a 0.288 ± 0.006a Se NPs 0.012 ± 0.005c 0.015 ± 0.002c 0.027 ± 0.003d 0.006 ± 0.001d Se NPs + Gly, Pro) 0.009 ± 0.002c 0.011 ± 0.003c 0.018 ± 0.005d 0.001 ± 0.001d WW + Se NPs 0.080 ± 0.008b 0.077 ± 0.005b 0.192 ± 0.009b 0.088 ± 0.007b WW + (Se NPs + Gly, Pro) 0.061 ± 0.006b 0.075 ± 0.007b 0.149 ± 0.007c 0.052 ± 0.004c HSD 0.008 0.009 0.011 0.007 Permissible limit* 0.10 0.10 0.20 0.10 (Kelly et al 2003;Prasad and Selvaraj 2014;El-Baz et al 2016;Attia et al 2019).To investigate the average particle size and the desired shape of the biosynthesized Se NPs, HTEM images were performed, and its outcomes were compared with the DLS analysis, which operated to define particle size distribution, hydrodynamic radius, and polydispersity index (PDI) (El-Batal et al 2016;El-Baz et al 2016;Elkodous et al 2019). The current values demonstrate that the biosynthesized Se NPs was a moderate mono-size spread.…”

Section: Discussionmentioning

confidence: 99%

Selenium nanoparticles induce growth and physiological tolerance of wastewater‑stressed carrot plants

et al. 2023

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Climate changes have a direct impact on agricultural lands through their impact on the rate of water levels in the oceans and seas, which leads to a decrease in the amount of water used in agriculture, and therefore the use of alternative sources of irrigation such as wastewater and overcoming its harmful effect on plants was one of the solutions to face this problem. In the present study, the impacts of the synthesized selenium nanoparticles (Se NPs) alone or in combination with glycine betaine and proline treatments on the growth, physiological, and yield attributes of wastewater irrigated carrot plants are investigated. Furthermore, to evaluate heavy metals uptake and accumulation in edible plant parts. The usage of wastewater to carrot plants significantly increased free proline contents, total phenols, superoxide dismutase, catalase, peroxidase, polyphenol oxidase, Malondialdehyde (MDA), and hydrogen peroxide (H2O2) throughout the two growth stages. While total soluble carbohydrate and soluble protein content in carrot shoots and roots were significantly reduced. Moreover, the concentrations of nickel (Ni), cadmium (Cd), lead (Pb), and cobalt (Co) in carrot plants were considerably higher than the recommended limits set by international organizations. Application of selenium nanoparticles alone or in combination with glycine betaine and proline reduced the contents of Ni, Cd, Pb, and Co; free proline; total phenols; superoxide dismutase; catalase; peroxidase; polyphenol oxidase; Malondialdehyde (MDA) and Hydrogen peroxide (H2O2) in carrot plants. However, morphological aspects, photosynthetic pigments, soluble carbohydrates, soluble protein, total phenol, and β-Carotene were enhanced in response to Se NPs application. As an outcome, this research revealed that Se NPs combined with glycine betaine and proline can be used as a strategy to minimize heavy metal stress caused by wastewater irrigation in carrot plants, consequently enhancing crop productivity and growth.

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Spirulina platensis-Polysaccharides Promoted Green Silver Nanoparticles Production Using Gamma Radiation to Suppress the Expansion of Pear Fire Blight-Producing Erwinia amylovora

Cited by 32 publications

References 75 publications

Merits of photocatalytic and antimicrobial applications of gamma-irradiated Co_xNi_1−xFe₂O₄/SiO₂/TiO₂;x= 0.9 nanocomposite for pyridine removal and pathogenic bacteria/fungi disinfection: implication for wastewater treatment

Merits of photocatalytic and antimicrobial applications of gamma-irradiated Co_xNi_1−xFe₂O₄/SiO₂/TiO₂;x= 0.9 nanocomposite for pyridine removal and pathogenic bacteria/fungi disinfection: implication for wastewater treatment

Characterization of nanomaterials synthesized from Spirulina platensis extract and their potential antifungal activity

Selenium nanoparticles induce growth and physiological tolerance of wastewater‑stressed carrot plants

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Spirulina platensis-Polysaccharides Promoted Green Silver Nanoparticles Production Using Gamma Radiation to Suppress the Expansion of Pear Fire Blight-Producing Erwinia amylovora

Cited by 32 publications

References 75 publications

Merits of photocatalytic and antimicrobial applications of gamma-irradiated CoxNi1−xFe2O4/SiO2/TiO2;x= 0.9 nanocomposite for pyridine removal and pathogenic bacteria/fungi disinfection: implication for wastewater treatment

Merits of photocatalytic and antimicrobial applications of gamma-irradiated CoxNi1−xFe2O4/SiO2/TiO2;x= 0.9 nanocomposite for pyridine removal and pathogenic bacteria/fungi disinfection: implication for wastewater treatment

Characterization of nanomaterials synthesized from Spirulina platensis extract and their potential antifungal activity

Selenium nanoparticles induce growth and physiological tolerance of wastewater‑stressed carrot plants

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Product

Resources

About

Merits of photocatalytic and antimicrobial applications of gamma-irradiated Co_xNi_1−xFe₂O₄/SiO₂/TiO₂;x= 0.9 nanocomposite for pyridine removal and pathogenic bacteria/fungi disinfection: implication for wastewater treatment

Merits of photocatalytic and antimicrobial applications of gamma-irradiated Co_xNi_1−xFe₂O₄/SiO₂/TiO₂;x= 0.9 nanocomposite for pyridine removal and pathogenic bacteria/fungi disinfection: implication for wastewater treatment