Environmental effects of nanosilver: impact on castor seed germination, seedling growth, and plant physiology

Yasur, Jyothsna; Rani, Poonam

doi:10.1007/s11356-013-1798-3

Cited by 198 publications

(104 citation statements)

References 67 publications

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“…An increase in SOD activity of L. esculentum was reported in AgNPs treated plants (Song et al, 2013). In Ricinus communis, AgNPs treatment enhanced SOD activity up to 1.000 mg/L application; however, it was decreased in 2.000 mg/L AgNPs-treated plants (Yasur and Rani, 2013). Parallel to these studies, high concentration of AgNPs caused a reduction in SOD activity in tomato plants.…”

Section: Discussionmentioning

confidence: 56%

Silver nanoparticles induced genotoxicity and oxidative stress in tomato plants

Çekiç¹,

Ekinci²,

Inal³

et al. 2017

Turk J Biol

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IntroductionSilver nanoparticles (AgNPs) are widely used among other nanoparticles in many industries within a wide range of consumer products because of their antibacterial and biocidal properties (Thuesombat et al., 2014). In recent years, the significant increase in the consumption of nanoparticles has caused environmental, health, and safety concerns regarding their potential effects (Ma et al., 2010;Pokhrel and Dubey, 2013). Nanoparticles could uncertainly spread to the environment. However, the interaction between AgNPs and plant systems is still not well known (Patlolla et al., 2012;Song et al., 2013).AgNPs are known to be absorbed by plants and could interact with intracellular parts causing water imbalances, cell damage, and decreases in photosynthesis (Kumari et al., 2009;Qian et al., 2013). They are also reported to have genotoxic effects on plant cells, inducing chromosomal aberrations and micronucleus induction (Patlolla et al., 2012). However, the impacts of nanoparticles on plants can vary according to the nanoparticle concentration, size, chemical properties, and plant species (Ma et al., 2010;Thuesombat et al., 2014).Nanotoxicity could lead to oxidative stress and previous studies indicate that AgNPs could induce toxicity due to their effect on reactive oxygen species (ROS) formation (Qian et al., 2013;McShan et al., 2014). The imbalance of ROS production and antioxidant activity can cause oxidative damage, and plants cope with this oxidative damage by their antioxidant defense mechanism (Saed-Moucheshi et al., 2014). Previously, studies on the genotoxicity of nanoparticles have used cell viability, chromosome aberration, or micronucleus assays to identify the genotoxic effect, and comet analysis for detecting the DNA damage in different plant species (Kumari et al., 2009;Kumari et al., 2011;Patlolla et al., 2012;Ghosh et al., 2012). However, these methods are very restricted for identifying the genotoxic effects of nanoparticles at the DNA level. DNA-based techniques are sensitive and selective assays that help to determine the genotoxic effects of environmental pollutants on DNA. One of these methods used for these aims is the intersimple sequence repeat (ISSR)-PCR assay. ISSR-PCR uses as primer microsatellite repeats (Zietkiewicz et al., 1994). The ISSR-PCR method is more sensitive than the random amplified polymorphic DNA assay (RAPD) (Correia et al., 2014;Bajpai et al., 2015), because of the exhibiting specificity of the sequence-tagged-site markers and high ratio of reproducibility potential owing to the use of longer primers (16-25 bp).

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Section: Discussionmentioning

confidence: 56%

Silver nanoparticles induced genotoxicity and oxidative stress in tomato plants

Çekiç¹,

Ekinci²,

Inal³

et al. 2017

Turk J Biol

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“…Activation of the antioxidant system and an increased outflow of electrolytes from tissues was observed by Yasur and Rani (2013) and Hatami and Ghorbanpour (2014). At the same time, other authors have observed an increase in chlorophyll content and increased photosynthetic efficiency caused by nanoparticles (Priyadarshini et al 2012).…”

Section: Discussionmentioning

confidence: 86%

Effect of nanosilver in wheat seedlings and Fusarium culmorum culture systems

et al. 2015

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The purpose of this study was to examine the effect of silver nanoparticles (AgNPs) produced using the high-voltage arc discharge method on the growth and metabolism of common wheat seedlings. Additionally, a simultaneous assessment of the AgNP-induced reduction in seedling infection by Fusarium culmorum (Fc) was performed. AgNP-and Fc-treated seedlings indicated that both factors considerably inhibited their growth. A significant Fc-induced reduction in seedling blight was observed following treatment with AgNPs; however, treatment with nanoparticles was also accompanied by a serious disintegration of the cell membranes of roots. Moreover, treatment with AgNPs increased the quantum efficiency of energy trapping in the PSII reaction centre (F v /F m ) with a simultaneous decrease in energy dissipation in the form of heat. Induction of photosynthesis in the presence of AgNPs did not affect height but was reflected in higher total dry weight. Moreover, analysis of antioxidant enzyme activity typical for the stress response indicated the toxicity of AgNPs treatment compared to Fc treatment. Seedlings exposed to AgNP activity demonstrated accumulation of Ag in roots and its translocation to aerial parts, while the pathogen reduced both accumulation and translocation of this element.

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“…However, other studies have shown that phytotoxicity increases with particle size. For example, Yasur and Rani (2013) affirmed that all Ag NP treatment groups had no effect on the growth of castor, but in the treatments where the Ag was used in its bulk form, inhibition was observed. This was confirmed by the work of Lee et al (2010).…”

Section: Factors Affecting Np Phytotoxicitymentioning

confidence: 94%

“…However, another study on castor bean (Ricinus communis) seeds under Ag NPs exposure reported an increased ROS production and associated antioxidant defense mechanisms: promoting peroxidase (POD) and superoxide dismutase enzyme (SOD) activity, and this caused an increase in phenolic acids. Phenols are synthesized in plants for defense against pathogens; therefore, ROS generation in this case may not be viewed as entirely negative as ROS also enhances root elongation up to a certain concentration (Yasur & Rani 2013). …”

Section: Phytotoxicity Mechanism In Plants Induced By Npsmentioning

confidence: 99%

Interactions between nanoparticles and plants: phytotoxicity and defense mechanisms

Yang

Cao

Rui

2017

Journal of Plant Interactions

352

117

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With the rapid development of nanotechnology, the potential releases of nanoparticles (NPs) have drawn considerable attention. Plants are essential fundamental components of all ecosystems, and the interaction between NPs and plants is an indispensable aspect of the risk assessment. Originally, this review focuses on NP phytotoxicity, which is an important precondition to promote the application of nanotechnology and to avoid the potential ecological risks. Both enhancive and inhibitive effects of various NPs on different plants' growth have been documented. In this paper, the influence factors of nanotoxicity and the mechanisms of these toxic effects are also summarized. Subsequently, the defense mechanisms are presented as well. Eventually, this review puts forward the prospects of research direction of the environmental behavior and the biological toxicity of NPs, hoping to bring new ideas to the further research on NP phytotoxicity.

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Environmental effects of nanosilver: impact on castor seed germination, seedling growth, and plant physiology

Cited by 198 publications

References 67 publications

Silver nanoparticles induced genotoxicity and oxidative stress in tomato plants

Silver nanoparticles induced genotoxicity and oxidative stress in tomato plants

Effect of nanosilver in wheat seedlings and Fusarium culmorum culture systems

Interactions between nanoparticles and plants: phytotoxicity and defense mechanisms

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