Toxicity of Ag+ on microstructure, biochemical activities and genic material of Trifolium pratense L. seedlings with special reference to phytoremediation

Mo, Fan; Li, Haibo; Li, Yinghua; Cui, Weina; Wang, Mingshuai; Li, Zhe; Chai, Rui; Wang, Hongxuan

doi:10.1016/j.ecoenv.2020.110499

Cited by 18 publications

(7 citation statements)

References 67 publications

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“…In the framework of this paper, the earlier database (Agathokleous et al 2020b) was extended by adding 121 dose responses of chlorophylls to The rise and fall of photosynthesis: hormetic dose response in plants 1 3 22 stresses, mined from 25 published studies (of which 67% were published in 2020) with 24 species of higher plants, including tree and other perennial plants (Table S1). The 22 stresses included herbicides (Liu et al 2019;Meseldžija et al 2020), human and veterinary antibiotics (Guo et al 2020;Liu et al 2020a), metallic elements (Seth et al 2008;Tang et al 2009;Jia et al 2015;Apodaca et al 2017;Wu et al 2018;Li et al 2020a;Małkowski et al 2020;Mo et al 2020;Yang et al 2020), micro/nano-plastics (Dong et al 2020;Li et al 2020c;Lian et al 2020;Pignattelli et al 2020), and various other types (Mostofa et al 2015;Wang et al 2016;Soliman et al 2019;Kutty et al 2020;He et al 2020;Gohari et al 2020b, a;Trejo-Téllez et al 2020). More than half (57.0%) of the new dose responses were statistically significant compared with the control group (typically a zero dose of the same stressor), according to the original analysis (many of them did not report statistics).…”

Section: Analysis Chlorophylls In Higher Plantsmentioning

confidence: 99%

The rise and fall of photosynthesis: hormetic dose response in plants

Agathokleous

2020

J. For. Res.

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The recent recognition that low doses of herbicides, human and veterinary antibiotics, metallic elements, micro/nano-plastics, and various other types of environmental pollutants widely enhance chlorophylls in the framework of hormesis created the need to further evaluate the response of photosynthetic pigments and gas exchange to low doses of stresses. An analysis of about 370 values of maximum stimulatory response (MAX; percentage of control response, %) of chlorophylls in higher plants, algae and duckweeds, and other photosynthesizing organisms, mined from published literatures, revealed a greater MAX for higher plants (median = 139.2%) compared to algae and duckweeds (median = 119.6%). However, an analysis of about 50 mined values of MAX of carotenoids revealed no significant difference in the median MAX between higher plants (median = 133.0%) and algae-duckweeds (median = 138.1%). About 70 mined values of MAX were also concentrated for photosynthetic rate (median MAX = 129.2%) and stomatal conductance (median MAX = 124.7%) in higher plants. Within higher plants, there was no significant difference in the median MAX among chlorophylls, carotenoids, photosynthetic rate, and stomatal conductance. Similarly, there was no significant difference in the median MAX between chlorophylls and carotenoids of pooled algae and duckweeds. The results suggest that the MAX is typically below 160% and as a rule below 200% of control response, and does not differ among chlorophylls, carotenoids, photosynthetic rate, and stomatal conductance. New research programs with improved experimental designs, in terms of number and spacing of doses within the “low-dose zone” of the hormetic dose–response relationship, are needed to study the molecular/genetic mechanisms underpinning the low-dose stimulation of photosynthesis and its ecological implications.

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Section: Analysis Chlorophylls In Higher Plantsmentioning

confidence: 99%

The rise and fall of photosynthesis: hormetic dose response in plants

Agathokleous

2020

J. For. Res.

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“…Ag NPs and Ag + ions are taken up from the soil by the roots’ epidermal cells, then are translocated between cells through the plasmodesmata (or apoplastically) and later on via vascular bundles to the shoot [ 19 , 20 ]. Both Ag NPs and Ag + ions can be accumulated in cells, causing oxidative stress [ 21 , 22 ] and disturbances in metabolism [ 15 , 23 ], water homeostasis, chlorophyll biosynthesis [ 24 ], mitotic cell division and chromosomal structure [ 10 , 25 , 26 ]. In some plant species, the application of Ag NPs stimulates their growth, which was found in Phaseolus vulgaris and Zea mays [ 27 ], Pisum sativum [ 28 ] and Trigonella foenum-graecum [ 29 ].…”

Section: Introductionmentioning

confidence: 99%

The Imbibition of Pea (Pisum sativum L.) Seeds in Silver Nitrate Reduces Seed Germination, Seedlings Development and Their Metabolic Profile

Szablińska-Piernik

Lahuta

Stałanowska

et al. 2022

Plants

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The use of silver nanoparticles (Ag NPs) on plants is accompanied by the occurrence of Ag+ ions, so the research of the effects of both on plants should be related. Therefore, in our study, the effects of Ag NPs suspension (containing Ag0 at 20 mg/L) and AgNO3 solutions (with the concentration of Ag+ ions at 20 and 50 mg/L) on the seed germination and early seedling growth (4 days) of pea (Pisum sativum L.) were compared. Both Ag NPs and AgNO3 did not decrease seed germination, and even stimulated seedling growth. In seedlings developing in the Ag NPs suspension, an increase in monosaccharides, homoserine and malate was noted. In the next experiment, the effect of short-term seed imbibition (8 h) in AgNO3 at elevated concentrations, ranging from 100 to 1000 mg/L, on the further seed germination, seedling growth (in absence of AgNO3) and their polar metabolic profiles were evaluated. The seed imbibition in AgNO3 solutions at 500 and 1000 mg/L reduced seed germination, inhibited seedlings’ growth and caused morphological deformations (twisting and folding of root). The above phytotoxic effects were accompanied by changes in amino acids and soluble carbohydrates profiles, in both sprouts and cotyledons. In deformed sprouts, the content of homoserine and asparagine (major amino acids) decreased, while alanine, glutamic acid, glutamine, proline, GABA (γ-aminobutyric acid) and sucrose increased. The increase in sucrose coincided with a decrease in glucose and fructose. Sprouts, but not cotyledons, also accumulated malic acid and phosphoric acid. Additionally, cotyledons developed from seeds imbibed with AgNO3 contained raffinose and stachyose, which were not detectable in sprouts and cotyledons of control seedlings. The obtained results suggest the possible disturbances in the mobilization of primary (oligosaccharides) and presumably major storage materials (starch, proteins) as well as in the primary metabolism of developing seedlings.

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“…[32][33][34] It is clear that the release of Ag + ions has a toxic effect on the environment. [77,78] But a combination of AgNPs with MNPs as the important binary system is an excellent method to solve these limitations. [79,80] An interesting finding that is reported in the literature regarding the antibacterial activity is that the antibacterial effectiveness of AgNPs is stronger when it interacts with Fe 3 O 4 NPs because the ionization of AgNPs in the nanocomposite might be accelerated by Fe 3+ ions, which can also be confirmed in this study.…”

Section: Antibacterial Activitymentioning

confidence: 99%

High antibacterial activity of new eco‐friendly and biocompatible polyurethane nanocomposites based on Fe₃O₄/Ag and starch moieties

Kamali

Faghihi

Mirhoseini

2022

Polymer Engineering & Sci

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Control of microbial infections is one of the growing concerns in modern societies due to the increasing presence and risk of pathogenic bacterial spread. Therefore, there is a strong demand to design new antibacterial agents to overcome these problems. The aim of this study is the preparation of a new series of biocompatible starch‐based polyurethane (PU) nanocomposites with a unique combination of magnetic nanoparticles (MNPs) and silver nanoparticles (AgNPs). In order to perform the study, first, a new synthetic diisocyanate was synthesized by a three‐step reaction and grafted into bis(2‐hydroxyethyl terephthalate) (BHET) and starch as a covering agent of MNPs containing different amounts of AgNPs. Afterward, the diisocyanate containing two active isocyanate moieties was reacted with hydroxyl groups of BHET and starch to form stable urethane linkages. Subsequently, the antibacterial activity of the pure synthetic PU and the produced nanocomposites were investigated against Escherichia coli and Staphylococcus aureus as Gram‐negative and Gram‐positive microorganism models, respectively. The obtained results exhibited that the nanocomposites have a synergistic effect on the antibacterial activity, which decreased with increasing of the Ag content. Such results may be related to the AgNPs agglomeration in the nanocomposite.

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Toxicity of Ag+ on microstructure, biochemical activities and genic material of Trifolium pratense L. seedlings with special reference to phytoremediation

Cited by 18 publications

References 67 publications

The rise and fall of photosynthesis: hormetic dose response in plants

The rise and fall of photosynthesis: hormetic dose response in plants

The Imbibition of Pea (Pisum sativum L.) Seeds in Silver Nitrate Reduces Seed Germination, Seedlings Development and Their Metabolic Profile

High antibacterial activity of new eco‐friendly and biocompatible polyurethane nanocomposites based on Fe₃O₄/Ag and starch moieties

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Toxicity of Ag+ on microstructure, biochemical activities and genic material of Trifolium pratense L. seedlings with special reference to phytoremediation

Cited by 18 publications

References 67 publications

The rise and fall of photosynthesis: hormetic dose response in plants

The rise and fall of photosynthesis: hormetic dose response in plants

The Imbibition of Pea (Pisum sativum L.) Seeds in Silver Nitrate Reduces Seed Germination, Seedlings Development and Their Metabolic Profile

High antibacterial activity of new eco‐friendly and biocompatible polyurethane nanocomposites based on Fe3O4/Ag and starch moieties

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Product

Resources

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High antibacterial activity of new eco‐friendly and biocompatible polyurethane nanocomposites based on Fe₃O₄/Ag and starch moieties