Quantum dot transport in soil, plants, and insects

Al-Salim, Najeh; Barraclough, Emma I.; Burgess, Elisabeth P. J.; Clothier, Brent; Deurer, M.; Green, Steve; Malone, Louise A.; Weir, Graham

doi:10.1016/j.scitotenv.2011.05.017

Cited by 93 publications

(57 citation statements)

References 41 publications

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“…Previous studies using confocal microscopy have shown that polymeric NPs can penetrate lung cells [36] and CeO 2 NPs can penetrate human bronchial cells [24]; however, these types of cells do not have cell walls. Al-Salim et al [37] used fluorescence to study the uptake of quantum dots (QD) by walled cell in plants. They observed the fluorescence emission of QD in the vasculature of cut stems of Allium cepa , Chrysanthemum sp., and Lolium perenne , but not in the rooted plants [37].…”

Section: Resultsmentioning

confidence: 99%

“…Al-Salim et al [37] used fluorescence to study the uptake of quantum dots (QD) by walled cell in plants. They observed the fluorescence emission of QD in the vasculature of cut stems of Allium cepa , Chrysanthemum sp., and Lolium perenne , but not in the rooted plants [37]. In the present study, FITC-stained CeO 2 NP aggregates were effectively seen within corn plants.…”

Section: Resultsmentioning

confidence: 99%

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Effect of surface coating and organic matter on the uptake of CeO2 NPs by corn plants grown in soil: Insight into the uptake mechanism

Zhao

Peralta-Videa

Varela-Ramı́rez

et al. 2012

Journal of Hazardous Materials

219

133

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Little is known about the fate, transport, and bioavailability of CeO2 nanoparticles (NPs) in soil. Moreover, there are no reports on the effect of surface coating upon NPs uptake by plants. In this study, Zea mays plants were grown for one month in unenriched and organic soils treated with coated and uncoated CeO2 NPs. In addition, plants were exposed to fluorescein isothiocyanate (FITC)-stained CeO2 NPs and analyzed in a confocal microscope. In organic soil, roots from uncoated and coated NPs at 100, 200, 400, and 800 mg kg−1 had 40, 80, 130, and 260% and 10, 70, 90, and 40% more Ce, respectively, compared to roots from unenriched soil. Conversely, shoots of plants from unenriched soil had significantly more Ce compared with shoots from organic soil. Confocal fluorescence images showed FITC-stained CeO2 NP aggregates in cell walls of epidermis and cortex, suggesting apoplastic pathway. The μXRF results revealed the presence of CeO2 NP aggregates within vascular tissues. To the authors knowledge this is the first report on the effects of surface coating and organic matter on Ce uptake from CeO2 NPs and upon the mechanisms of CeO2 NPs uptake by higher plants

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Effect of surface coating and organic matter on the uptake of CeO2 NPs by corn plants grown in soil: Insight into the uptake mechanism

Zhao

Peralta-Videa

Varela-Ramı́rez

et al. 2012

Journal of Hazardous Materials

219

133

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“…As no NPs were detected in the cell wall, intercellular spaces or in plasmodesmata, and what is most important, in the neighbouring cells, we postulate that nanoparticles do not move apoplastically or symplasmically in barley cultivar that was studied, at least in the culture conditions that were used here. Researches on the penetration of nanoparticles into wounded plants have shown that they can accumulate most NPs or QDs only in the first few centimetres from the injured stems 39, 40 which indicates that the translocation of NPs is limited, at least in some plants.…”

Section: Discussionmentioning

confidence: 99%

Fate of neutral-charged gold nanoparticles in the roots of the Hordeum vulgare L. cultivar Karat

Milewska‐Hendel

Zubko

Karcz

et al. 2017

Sci Rep

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Nanoparticles (NPs) have a significant impact on the environment and living organisms. The influence of NPs on plants is intensively studied and most of the data indicate that NPs can penetrate into plants. The studies presented here were performed on the roots of Hordeum vulgare L. seedlings using neutral-charge gold nanoparticles (AuNPs) of different sizes. In contrast to the majority of the published data, the results presented here showed that during the culture period, AuNPs: 1/did not enter the root regardless of their size and concentration, 2/that are applied directly into the cells of a root do not move into neighbouring cells. The results that were obtained indicate that in order to extend our knowledge about the mechanisms of the interactions between NPs and plants, further studies including, among others, on different species and a variety of growth conditions are needed.

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“…Changes in pH, ionic strength (IS), dissolved ions, and natural organic matter (NOM) continuously change the form of occurrence of nanoparticles and their coagulation rate and thus possibly also their bioavailability and toxicity (Chenget al" 2011;Klaine et al, 2008;Navarro et al, 2008;Van Hoecke etal,, 2011), Soils may be exposed to ENM following the application of wastewatet treatment biosolid material, but exposure may also occur through leakage from landfills, or from spillage/fugitive emissions to waters and land from manufacturing facilities (Gottschalk et al,, 2009) or ENM may even be added deliberately as pesticides (Batuah and Dutta, 2009). Engineered nanomaterials added to soil can be taken up by plants or invertebrates leading to toxicity (Al-Salim et al, 2011;Shoults-Wilson et al, 2011), but how the bioavailability and toxicity of ENM is affected by differences in soil physical and chemical properties has not yet been investigated systematically. Initial investigations suggest differences in soil properties can have a large effect on bioavailability of ENM (Shoults-Wilson et al,, 2011;.…”

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confidence: 99%

Retention and Dissolution of Engineered Silver Nanoparticles in Natural Soils

Cornelis

Thomas

McLaughlin

et al. 2012

Soil Science Soc of Amer J

171

129

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Soils are likely to be increasingly exposed to nanoparticles due to growing consumer use of nanoparticles. This has necessitated an investigation into the fate and bioavailability of nanoparticles in natural soils. However, the effect of soil properties on these processes are unknown. To find the dominant properties that determine AgNP retention in natural soils, nonequilibrium retention (Kr) values of polyvinylpyrrolidone (PVP) coated silver nanoparticles (AgNP) were obtained in suspensions of 16 soils having a wide range of physical and chemical properties. The AgNP dissolution was investigated using ultrafiltration, but could only be detected in six soils, possibly due to strong partitioning of dissolved Ag (median Kd 1791 L kg−1); a process that increased predominantly with the organic matter content of the soils. When corrected for partitioning, dissolution of AgNP was higher (median 26% of total Ag added as AgNP) in these six soils compared to dissolution in artificial soil solutions. The homocoagulation kinetics of AgNP as a function of increasing NaClO4 concentrations were studied at pH 4 and pH 8, showing that homocoagulation of AgNP is unlikely in the studied soil suspensions. Moreover, Kr values (median value 589 L kg−1) only correlated with the soil granulometric clay content and not with parameters that increase the homocoagulation rate, a correlation that suggests that negatively charged AgNP were adsorbed preferentially at positively charged surface sites of clay‐sized minerals. Adsorption of negatively charged engineered nanoparticles by Fe and Al oxides and mineral clay edges may thus be an important fate‐determining reaction in soils, and possibly also in aquatic systems.

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Quantum dot transport in soil, plants, and insects

Cited by 93 publications

References 41 publications

Effect of surface coating and organic matter on the uptake of CeO2 NPs by corn plants grown in soil: Insight into the uptake mechanism

Effect of surface coating and organic matter on the uptake of CeO2 NPs by corn plants grown in soil: Insight into the uptake mechanism

Fate of neutral-charged gold nanoparticles in the roots of the Hordeum vulgare L. cultivar Karat

Retention and Dissolution of Engineered Silver Nanoparticles in Natural Soils

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