Green biosynthesized silver nanoparticles using Acalypha wilkesiana extract control root-knot nematode

Heflish, Ahmed A.; Hanfy, Amira E.M.; Ansari, Mohammad Javed; Dessoky, Eldessoky S.; Attia, Attia O.; Elshaer, Moustafa M.; Gaber, M.; Kordy, Ahmed; Doma, A. S.; Abdelkhalek, Ahmed; Behiry, Said I.

doi:10.1016/j.jksus.2021.101516

Cited by 31 publications

(17 citation statements)

References 30 publications

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“…SEM is a powerful method for examining surface morphology with the direct visualization of nanoparticles [ 39 ]. In the current study, SEM analysis revealed that the morphological characteristics showed boulder-like spherical and irregular particles for the Egyptian and standard nanoclays ( Figure 1 ).…”

Section: Resultsmentioning

confidence: 99%

Foliar Application of Nanoclay Promotes Potato (Solanum tuberosum L.) Growth and Induces Systemic Resistance against Potato Virus Y

Aseel

Abdelkhalek

Al-Otibi

et al. 2022

Viruses

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Potato virus Y (PVY) is one of the most harmful phytopathogens. It causes big problems for potatoes and other important crops around the world. Nanoclays have been extensively studied for various biomedical applications. However, reports on their interactions with phytopathogens, particularly viral infections, are still limited. In this study, the protective activity of Egyptian nanoclay (CE) and standard nanoclay (CS) against PVY was evaluated on potato (Solanum tuberosum L.) plants. Their physicochemical and morphological properties were examined with scanning electron microscopy (SEM), transmission electron microscopy (TEM), Fourier-transform infrared spectroscopy (FTIR), and energy dispersive spectrometer (EDS). SEM and TEM analyses revealed that CE has a spherical and hexagonal structure ranging from 20 to 80 nm in size, while CS has boulder-like and tubular structures of about 320 nm in size. FTIR and EDS showed that both nanoclay types have different functional groups and contain many vital plant nutrients that are necessary for every stage and process of the plant, including development, productivity, and metabolism. Under greenhouse conditions, a 1% nanoclay foliar application enhanced potato growth, reduced disease symptoms, and reduced PVY accumulation levels compared with non-treated plants. Significant increases in levels of antioxidant enzymes (PPO and POX) and considerable decreases in oxidative stress markers (MDA and H2O2) were also reported. Moreover, a significant increase in the transcriptional levels of defense-related genes (PAL-1, PR-5, and CHI-2) was observed. All experiment and analysis results indicate that the CE type is more effective than the CS type against PVY infection. Based on these results, the foliar applications of nanoclay could be used to manage plant viral infections in a way that is both effective and environmentally friendly. To our knowledge, this is the first report of the antiviral activity of the foliar application of nanoclay against PVY infection.

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Section: Resultsmentioning

confidence: 99%

Foliar Application of Nanoclay Promotes Potato (Solanum tuberosum L.) Growth and Induces Systemic Resistance against Potato Virus Y

Aseel

Abdelkhalek

Al-Otibi

et al. 2022

Viruses

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“…Encouragingly, bio-AgNPs significantly reduced the nematode activity, mortality, egg hatching, and movement of larvae. In another experiment, instead of chemical nematicide products, bio-AgNPs synthesized using Acalypha wilkesiana aqueous extract could be recommended to manage the plant-parasitic nematode, as a simple, stable, and costeffective way of keeping the environment safe [199]. It is expected that the application of bio-AgNPs at low concentrations will be eco-friendly and will decrease farm management costs.…”

Section: Plant Protectionmentioning

confidence: 99%

Biogenic Silver Nanoparticles: What We Know and What Do We Need to Know?

et al. 2021

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Nanobiotechnology is considered to be one of the fastest emerging fields. It is still a relatively new and exciting area of research with considerable potential for development. Among the inorganic nanomaterials, biogenically synthesized silver nanoparticles (bio-AgNPs) have been frequently used due to their unique physicochemical properties that result not only from their shape and size but also from surface coatings of natural origin. These properties determine antibacterial, antifungal, antiprotozoal, anticancer, anti-inflammatory, and many more activities of bio-AgNPs. This review provides the current state of knowledge on the methods and mechanisms of biogenic synthesis of silver nanoparticles as well as their potential applications in different fields such as medicine, food, agriculture, and industries.

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“…Compared to chitosan, the foliar application of finger millet plants with chitosan nanoparticles (0.1%, w/v) significantly enhanced growth, yield, mineral content, and several defense enzymes such as peroxidase, chitinase, and polyphenol oxidase [23]. Furthermore, the biostimulant activity of chitosan nanoparticles in a variety of agricultural crop plants was reported [21][22][23][24] However, research to combat viral infections is still beginning [25,26]. Consequently, the current study aimed to synthesize and characterize chitosan/dextran nanoparticles (CDNPs) using dynamic light scattering (DLS), scanning electron microscope (SEM), and Fourier transform-infrared (FTIR) spectroscopy.…”

Section: Introductionmentioning

confidence: 99%

Chitosan Nanoparticles Inactivate Alfalfa Mosaic Virus Replication and Boost Innate Immunity in Nicotiana glutinosa Plants

Abdelkhalek

Qari

Abu‐Saied

et al. 2021

Plants

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Plant viral infection is one of the most severe issues in food security globally, resulting in considerable crop production losses. Chitosan is a well-known biocontrol agent against a variety of plant infections. However, research on combatting viral infections is still in its early stages. The current study investigated the antiviral activities (protective, curative, and inactivation) of the prepared chitosan/dextran nanoparticles (CDNPs, 100 µg mL−1) on Nicotiana glutinosa plants. Scanning electron microscope (SEM) and dynamic light scattering analysis revealed that the synthesized CDNPs had a uniform, regular sphere shapes ranging from 20 to 160 nm in diameter, with an average diameter of 91.68 nm. The inactivation treatment was the most effective treatment, which resulted in a 100% reduction in the alfalfa mosaic virus (AMV, Acc# OK413670) accumulation level. On the other hand, the foliar application of CDNPs decreased disease severity and significantly reduced viral accumulation levels by 70.43% and 61.65% in protective and curative treatments, respectively, under greenhouse conditions. Additionally, the induction of systemic acquired resistance, increasing total carbohydrates and total phenolic contents, as well as triggering the transcriptional levels of peroxidase, pathogen-related protein-1, and phenylalanine ammonia-lyase were observed. In light of the results, we propose that the potential application of CDNPs could be an eco-friendly approach to enhance yield and a more effective therapeutic elicitor for disease management in plants upon induction of defense systems.

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Green biosynthesized silver nanoparticles using Acalypha wilkesiana extract control root-knot nematode

Cited by 31 publications

References 30 publications

Foliar Application of Nanoclay Promotes Potato (Solanum tuberosum L.) Growth and Induces Systemic Resistance against Potato Virus Y

Foliar Application of Nanoclay Promotes Potato (Solanum tuberosum L.) Growth and Induces Systemic Resistance against Potato Virus Y

Biogenic Silver Nanoparticles: What We Know and What Do We Need to Know?

Chitosan Nanoparticles Inactivate Alfalfa Mosaic Virus Replication and Boost Innate Immunity in Nicotiana glutinosa Plants

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