Toxic effects of engineered nanoparticles (metal/metal oxides) on plants using Allium cepa as a model system

Roy, Barsha; Krishnan, Suresh Palamadai; Chandrasekaran, Natarajan; Mukherjee, Amitava

doi:10.1016/bs.coac.2019.04.009

Cited by 18 publications

(12 citation statements)

References 59 publications

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“…The supplementation of 0.1 Ag 2 O NPs into BS increased the amount of dead cells in 50% and decreased mitotic index in 30%. Obtained data are in agreement with the literature data on the cytotoxicity of Me x O y NPs [80][81][82][83][84][85][86][87][88]. To evaluate the created materials, readers are invited to compare the properties of our material and the closest analogues created earlier (Table 1).…”

Section: Resultssupporting

confidence: 81%

Synthesis of a Novel, Biocompatible and Bacteriostatic Borosiloxane Composition with Silver Oxide Nanoparticles

et al. 2022

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Microbial antibiotic resistance is an important global world health problem. Recently, an interest in nanoparticles (NPs) of silver oxides as compounds with antibacterial potential has significantly increased. From a practical point of view, composites of silver oxide NPs and biocompatible material are of interest. A borosiloxane (BS) can be used as one such material. A composite material combining BS and silver oxide NPs has been synthesized. Composites containing BS have adjustable viscoelastic properties. The silver oxide NPs synthesized by laser ablation have a size of ~65 nm (half-width 60 nm) and an elemental composition of Ag2O. The synthesized material exhibits strong bacteriostatic properties against E. coli at a concentration of nanoparticles of silver oxide more than 0.01%. The bacteriostatic effect depends on the silver oxide NPs concentration in the matrix. The BS/silver oxide NPs have no cytotoxic effect on a eukaryotic cell culture when the concentration of nanoparticles of silver oxide is less than 0.1%. The use of the resulting composite based on BS and silver oxide NPs as a reusable dry disinfectant is due to its low toxicity and bacteriostatic activity and its characteristics are not inferior to the medical alloy nitinol.

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Section: Resultssupporting

confidence: 81%

Synthesis of a Novel, Biocompatible and Bacteriostatic Borosiloxane Composition with Silver Oxide Nanoparticles

et al. 2022

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“…Necrotic lesions containing dead cells were clearly distinguished by dark blue staining with Evans blue. Due to the semipermeable property of the cells, living cells exclude the dye; dead cells are incapable of rejecting the dye and are thereby stained blue [60]. However, the number of HR-like lesions in all pre-exposed leaves slightly varied at different time points.…”

Section: Discussionmentioning

confidence: 99%

Green Leaf Volatile Confers Management of Late Blight Disease: A Green Vaccination in Potato

Najdabbasi

Mirmajlessi

Dewitte

et al. 2021

JoF

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Yield losses of crops due to plant pathogens are a major threat in all agricultural systems. In view of environmental issues and legislative limitations for chemical crop protection products, the need to design new environmentally friendly disease management strategies has gained interest. Despite the unique capability of green leaf volatiles (GLVs) to suppress a broad spectrum of plant pathogens, their capacity to control the potato late-blight-causing agent Phytophthora infestans has not been well studied. This study addresses the potential role of the GLV Z-3-hexenyl acetate (Z-3-HAC) in decreasing the severity of late blight and the underlying gene-based evidence leading to this effect. Nine-week-old potato plants (Solanum tuberosum L.) were exposed to Z-3-HAC before they were inoculated with P. infestans genotypes at different time points. These pre-exposed potato plants exhibited slower disease development after infection with the highly pathogenic genotype of P. infestans (EU-13-A2) over time. Qualitative assessment showed that the exposed, infected plants possessed significantly lower sporulation intensity and disease severity compared to the control plants. Hypersensitive response (HR)-like symptoms were observed on the treated leaves when inoculated with different pathogen genotypes. No HR-like lesions were detected on the untreated leaves after infection. It was shown that the transcript levels of several defense-related genes, especially those that are involved in reactive oxygen species (ROS) production pathways were significantly expressed in plants at 48 and 72 h postexposure to the Z-3-HAC. The current work provides evidence on the role of Z-3-HAC in the increased protection of potato plants against late blight through plant immunity and offers new opportunities for the sustainable control of potato diseases.

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“…Examples of these enzymes are those that participate in protection against oxidative stress and cell injury, and enzymes facilitating neural activity and nervous system processes, such as glutathione-S-transferase (GST), glutathione peroxidase (GPx), acetylcholinesterase (AChE), lactate dehydrogenase (LDH), and others. Biomonitoring the enzymatic activity therefore can help in characterizing the toxic profile of emerging contaminants [12].…”

Section: Introductionmentioning

confidence: 99%

Monitoring and Ecotoxicity Assessment of Emerging Contaminants in Wastewater Discharge in the City of Prague (Czech Republic)

Diaz-Sosa

Tapia‐Salazar

Wanner

et al. 2020

Water

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Emerging contaminants (ECs) are not monitored nor regulated consistently, but may have negative effects on human health and ecosystem balance. Although pharmaceuticals and personal care products are among the main ECs found in surface and wastewater, their toxicity and fate are currently not sufficiently studied. In this study, we analyzed for the first time a group of 46 ECs in the secondary effluent of the wastewater treatment plants (WWTP) of Prague. Thirty-seven compounds were identified in the discharge to surface water. Three compounds had no toxicology information on Artemia salina: furosemide, hydrochlorothiazide, and tramadol. We performed acute toxicity (LC50) tests and enzyme assays after 24 and 48 h at room temperature and 28 °C for these three compounds. LC50 ranged from 225.01 mg/L for furosemide, the most toxic, up to above 14,000 mg/L for tramadol. Changes in enzymatic activity for GST, GPx, AChE, and LDH when A. salina were exposed to LC25 for each contaminant were conspicuous and significant in a contaminant-, exposure time-, and temperature-dependent manner. These biochemical markers complement the toxicity profile of these contaminants in aquatic ecosystems and highlight the need for further research on other ECs and their implications, and the regulations required to protect human and ecological health.

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Toxic effects of engineered nanoparticles (metal/metal oxides) on plants using Allium cepa as a model system

Cited by 18 publications

References 59 publications

Synthesis of a Novel, Biocompatible and Bacteriostatic Borosiloxane Composition with Silver Oxide Nanoparticles

Synthesis of a Novel, Biocompatible and Bacteriostatic Borosiloxane Composition with Silver Oxide Nanoparticles

Green Leaf Volatile Confers Management of Late Blight Disease: A Green Vaccination in Potato

Monitoring and Ecotoxicity Assessment of Emerging Contaminants in Wastewater Discharge in the City of Prague (Czech Republic)

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