New insight into naturally formed nanosilver particles: role of plant root exudates

Guo, Huiyuan; Han, Fengpeng; Shang, Heping; Xiong, Sicheng; Huynh, My Hang V.; Thistle, Lauren; Meng, Liting; He, Lili; Xing, Baoshan

doi:10.1039/d0en01188f

Cited by 7 publications

(4 citation statements)

References 61 publications

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“…39 In addition, both synthesized nHA were further characterized by TEM-energy dispersive X-ray spectroscopy (TEM-EDS, Hitachi 7700, Hitachi Incorporation, Tokyo, Japan), Fourier-transform infrared spectroscopy (FTIR, Spectrum One, PerkinElmer Inc., Waltham, MA) 40 and a UV−vis spectrophotometer (Agilent 8453, Santa Clara, CA). 41 As shown in Supporting Information (SI) Figure S1, the large and small size of nHA was needle-like and rod shaped, respectively. The average size of large nHA was 20 nm in width and 100−200 nm in length; the average size of small nHA was 10 nm in width and 10−20 nm in length.…”

Section: ■ Materials and Methodsmentioning

confidence: 93%

“…Then, the suspensions were dropped onto Cu grids to observe the size and morphology of different sized nHA under transmission electron microscopy (TEM, JEM-2100, JEOL, Japan) . In addition, both synthesized nHA were further characterized by TEM-energy dispersive X-ray spectroscopy (TEM-EDS, Hitachi 7700, Hitachi Incorporation, Tokyo, Japan), Fourier-transform infrared spectroscopy (FTIR, Spectrum One, PerkinElmer Inc., Waltham, MA) and a UV–vis spectrophotometer (Agilent 8453, Santa Clara, CA) . As shown in Supporting Information (SI) Figure S1, the large and small size of nHA was needle-like and rod shaped, respectively.…”

Section: Methodsmentioning

confidence: 99%

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Role of Nanoscale Hydroxyapatite in Disease Suppression of Fusarium-Infected Tomato

Jia

et al. 2021

Environ. Sci. Technol.

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The present study investigated the mechanisms by which large-and small-sized nanoscale hydroxyapatite (nHA) suppressed Fusarium-induced wilt disease in tomato. Both nHA sizes at 9.3 mg/L (low) and 46.5 mg/L (high dose) phosphorus (P) were foliar-sprayed on Fusarium-infected tomato leaf surfaces three times. Diseased shoot mass was increased by 40% upon exposure to the low dose of large-sized nHA compared to disease controls. Exposure to both nHA sizes significantly elevated phenylalanine ammonialyase activity and total phenolic content in Fusarium-infected shoots by 30−80% and 40−68%, respectively. Shoot salicylic acid content was also increased by 10−45%, suggesting the potential relationship between antioxidant and phytohormone pathways in nHA-promoted defense against fungal infection. Exposure to the high dose of both nHA sizes increased the root P content by 27−46%. A constrained analysis of principal coordinates suggests that high dose of both nHA sizes significantly altered the fatty acid profile in diseased tomato. Particularly, the diseased root C18:3 content was increased by 28−31% in the large-sized nHA treatments, indicating that nHA remodeled the cell membrane as part of defense against Fusarium infection. Taken together, our findings demonstrate the important role of nHA in promoting disease suppression for the sustainable use of nHA in nanoenabled agriculture.

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Section: ■ Materials and Methodsmentioning

confidence: 93%

Section: Methodsmentioning

confidence: 99%

Role of Nanoscale Hydroxyapatite in Disease Suppression of Fusarium-Infected Tomato

Jia

et al. 2021

Environ. Sci. Technol.

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“…Mahmoudi et al summarized that active molecules adsorbed on the surface of hydrophobic NPs had extremely strong conformational changes, while the properties of NPs and biological substrates could influence the dynamic processes and stability of soft and hard corona. 30 As natural ligands with potential reducing activity, 59 complicated root exudates have an increased likelihood of adhering to ZnO NP surfaces and altering environmental and biological processes in the rootnano system.…”

Section: Evolution Of the Active Interface Between Nps And Rootsmentioning

confidence: 99%

Driving Role of Zinc Oxide Nanoparticles with Different Sizes and Hydrophobicity in Metabolic Response and Eco-Corona Formation in Sprouts (Vigna radiata)

Kang,

Bai,

Liu

et al. 2024

Environ. Sci. Technol.

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Zinc oxide nanoparticles (ZnO NPs) cause biotoxicity and pose a potential ecological threat; however, their effects on plant metabolism and eco-corona evolution between NPs and organisms remain unclear. This study clarified the molecular mechanisms underlying physiological and metabolic responses induced by three different ZnO NPs with different sizes and hydrophobicity in sprouts (Vigna radiata) and explored the critical regulation of eco-corona formation in root–nano systems. Results indicated that smaller-sized ZnO inhibited root elongation by up to 37.14% and triggered oxidative burst and apoptosis. Metabolomics confirmed that physiological maintenance after n-ZnO exposure was mainly attributed to the effective stabilization of nitrogen fixation and defense systems by biotransformation of the flavonoid pathway. Larger-sized or hydrophobic group-modified ZnO exhibited low toxicity in sprouts, with 0.89-fold upregulation of citrate in central carbon metabolism. This contributed to providing energy for resistance to NP stress through amino acid and carbon/nitrogen metabolism, accompanied by changes in membrane properties. Notably, smaller-sized and hydrophobic NPs intensely stimulated the release of root metabolites, forming corona complexes with exudates. The hydrogen-bonded wrapping mechanism in protein secondary structure and hydrophobic interactions of heterogeneous functional groups drove eco-corona formation, along with the corona evolution intensity of n-ZnO > s-ZnO > b-ZnO based on higher (α-helix + 3-turn helix)/β-sheet ratios. This study provides crucial insight into metabolic and eco-corona evolution in bionano fates.

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“…The silver/mushroom extraction mixture was stored at 30 • C for one day. The first indication for the formation of silver nanoparticles is the color change from colorless to brown [39,40]. The obtained Ag NP mixture was centrifuged at 15,000 rpm for 15 min.…”

Section: Myco-synthesis and Purification Of Ag Npsmentioning

confidence: 99%

Biosynthesis, Spectrophotometric Follow-Up, Characterization, and Variable Antimicrobial Activities of Ag Nanoparticles Prepared by Edible Macrofungi

et al. 2023

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The biosynthesis of silver nanoparticles (Ag NPs) could play a significant role in the development of commercial antimicrobials. Herein, the biosynthesis of Ag NPs was studied using the edible mushroom Pleurotus floridanus, and following its formation, spectrophotometry was used to detect the best mushroom content, pH, temperature, and silver concentration. After that, the morphology was described via transmission electron microscopy (TEM), and nanoscale-size particles were found ranging from 11 to 13 nm. The best conditions of Ag content and pH were found at 1.0 mM and 11.0, respectively. In addition, the best mushroom extract concentration was found at 30 g/L. According to XRD analysis, the crystal structure of the formed amorphous Ag NPs is cubic with a space group of fm-3m and a space group number of 225. After that, the function groups at the surface of the prepared Ag NPs were studied via FTIR analysis, which indicated the presence of C=O, C-H, and O-H groups. These groups could indicate the presence of mushroom traces in the Ag NPs, which was confirmed via the amorphous characteristics of Ag NPs from the XRD analysis. The prepared Ag NPs have a high impact against different microorganisms, which could be attributed to the ability of Ag NPs to penetrate the cell bacterial wall.

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New insight into naturally formed nanosilver particles: role of plant root exudates

Abstract: Manufactured silver nanoparticles (nAg) have been extensively studied because of questions and concerns on their unique properties, behavior and associated impacts on environmental health and safety. In contrast, naturally formed...

Cited by 7 publications

References 61 publications

Role of Nanoscale Hydroxyapatite in Disease Suppression of Fusarium-Infected Tomato

Role of Nanoscale Hydroxyapatite in Disease Suppression of Fusarium-Infected Tomato

Driving Role of Zinc Oxide Nanoparticles with Different Sizes and Hydrophobicity in Metabolic Response and Eco-Corona Formation in Sprouts (Vigna radiata)

Biosynthesis, Spectrophotometric Follow-Up, Characterization, and Variable Antimicrobial Activities of Ag Nanoparticles Prepared by Edible Macrofungi

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