High diversity of microalgae as a tool for the synthesis of different silver nanoparticles: A species-specific green synthesis

Moraes, Leonardo C.; Figueiredo, Rute Cunha; Ribeiro‐Andrade, Rodrigo; Pontes-Silva, Augusto V.; Arantes, Mônica L.; Giani, Alessandra; Figueredo, Cleber Cunha

doi:10.1016/j.colcom.2021.100420

Cited by 23 publications

(8 citation statements)

References 70 publications

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“…Thus, the application of NPs is one of the new manners to ameliorate growth and plant performance under saline environments [ 6 ]. Among all types of NPs, silver nanoparticles (AgNPs) have been extensively used due to their eco-friendly implementations in biological science, unparalleled physiochemical characteristics, and large specific surfaces [ 7 ]. AgNPs increased or minimized plant growth and development depending on the concentration, size, and application time [ 8 ].…”

Section: Introductionmentioning

confidence: 99%

Assessment of the Impacts of Green Synthesized Silver Nanoparticles on Maerua oblongifolia Shoots under In Vitro Salt Stress

et al. 2022

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Salinity is one of the major abiotic stresses that affect the plant’s growth and development. Recently, the contribution of nanoparticles (NPs) to ameliorating salinity stresses has become the new field of interest for scientists due to their special physiochemical properties in the biological system. This study is designed to examine the effects of biosynthesized silver nanoparticles (AgNPs) spherical in shape (size range between 9 and 30 nm) on morphophysiological characteristics and the antioxidant defense system of in vitro raised Maerua oblongifolia under four levels of salt stress (0, 50, 100, and 200 mM NaCl). Our findings reveal that the application of AgNPs (0, 10, 20, and 30 mg/L) to M. oblongifolia shoots significantly alleviates the adverse effects of salt stress and ameliorates plant developmental-related parameters and defense systems. High salinity elevates the oxidative damage by over-accumulation of the levels of total soluble sugars, proline, hydrogen peroxide (H2O2), and malondialdehyde (MDA). In addition, enhancing the activity of the antioxidant enzymes, total phenolic, and flavonoid content over the control. Interestingly, the application of AgNPs to salinized plants improved the growth traits and photosynthetic pigment production and caused higher enhancement in antioxidant enzyme activities. Furthermore, mitigating the oxidative damage by lowering the accumulation of proline, soluble sugars, H2O2, MDA, and total phenolic and flavonoid contents in salt-stressed plants. In general, AgNPs augmented the growth of M. oblongifolia shoots under saline conditions through different strategies; thus, AgNPs can be used as an appropriate eco-friendly approach that enhances salinity tolerance in plants.

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Section: Introductionmentioning

confidence: 99%

Assessment of the Impacts of Green Synthesized Silver Nanoparticles on Maerua oblongifolia Shoots under In Vitro Salt Stress

et al. 2022

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“…The algae-mediated biosynthesis of AgNPs can be conducted intra- or extracellularly, by taking advantage of the wide range of biomolecules found inside the microalgae cell or of those excreted in the culture medium. Several investigators have applied the extracellular synthesis of AgNPs using microalgae cell extracts, extracellular polymeric substances (EPS), or the CFS of microalgae cultures [ 33 , 34 , 35 , 36 , 37 , 38 , 39 , 40 , 41 , 42 , 43 , 44 ].…”

Section: Resultsmentioning

confidence: 99%

Green Synthesis of Silver Nanoparticles Using the Cell-Free Supernatant of Haematococcus pluvialis Culture

Savvidou,

Kontari,

Kalantzi

et al. 2023

Materials

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The green synthesis of silver nanoparticles (AgNPs) using the cell-free supernatant of a Haematococcus pluvialis culture (CFS) was implemented in the current study, under illumination conditions. The reduction of Ag+ to AgNPs by the CFS could be described by a pseudo-first-order kinetic equation at the temperature range tested. A high reaction rate during synthesis and stable AgNPs were obtained at 45 °C, while an alkaline pH (pH = 11.0) and a AgNO3 aqueous solution to CFS ratio of 90:10 (v/v) proved to be the most effective conditions in AgNPs synthesis. A metal precursor (AgNO3) at the concentration range tested (1–5 mM) was the limited reactant in the synthesis process. The synthesis of AgNPs was accomplished under static and agitated conditions. Continuous stirring enhanced the rate of reaction but induced aggregation at prolonged incubation times. Zeta potential and polydispersity index measurements indicated stable AgNPs and the majority of AgNPs formation occurred in the monodisperse phase. The X-ray diffraction (XRD) pattern revealed the face-centered cubic structure of the formed AgNPs, while TEM analysis revealed that the AgNPs were of a quasi-spherical shape with a size from 30 to 50 nm. The long-term stability of the AgNPs could be achieved in darkness and at 4 °C. In addition, the synthesized nanoparticles showed antibacterial activity against Escherichia coli.

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“…Scientists attributed S. platensis's extracellular synthesis of nanoparticles to the participation of peptides and proteins as reducing agents. In addition to monometallic nanoparticles, S. platensis is also able to biosynthesis bimetal nanoparticles, like Ag-Au nanoparticles (Moraes et al, 2021).…”

Section: Nanoparticles Synthesis By Other Groups Of Algaementioning

confidence: 99%

A Review of the Application of Nanoparticles Biosynthesized by Microalgae and Cyanobacteria in Medical and Veterinary Sciences

Anvar

Nowruzi²,

Afshari³

2023

Iran J Vet Med

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Green synthesis of nanoparticles is an environmentally friendly method to produce nanoparticles with unique biological, physical, and chemical properties. Today, biological synthesis methods have drawn significant attention because of the drawbacks of physical and chemical synthesis, such as poisonous side effects, time and power usage, and heavy price. Among different microorganisms, cyanobacteria are suitable candidates as regenerating and stabilizing agents because of their capability to collect heavy metals from the environment and produce various bioactive compounds such as colorants and enzymes. The green synthesis of nanoparticles by cyanobacteria has captivated extensive consideration as a secure, easy, stable, economical, and environmentally friendly resolution for biomedical and veterinary applications. Meanwhile, the secondary metabolites synthesized by cyanobacteria with the ability of extracellular and extracellular metals reduction and oxidation are very noteworthy and have antibacterial, antifungal, anti-algae, anticancer, and photocatalytic activities. This study considers the properties, as well as biomedical and veterinary applications of nanoparticles generated by cyanobacteria.

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High diversity of microalgae as a tool for the synthesis of different silver nanoparticles: A species-specific green synthesis

Cited by 23 publications

References 70 publications

Assessment of the Impacts of Green Synthesized Silver Nanoparticles on Maerua oblongifolia Shoots under In Vitro Salt Stress

Assessment of the Impacts of Green Synthesized Silver Nanoparticles on Maerua oblongifolia Shoots under In Vitro Salt Stress

Green Synthesis of Silver Nanoparticles Using the Cell-Free Supernatant of Haematococcus pluvialis Culture

A Review of the Application of Nanoparticles Biosynthesized by Microalgae and Cyanobacteria in Medical and Veterinary Sciences

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