Effects of rare earth oxide nanoparticles on root elongation of plants

Ma, Yuhui; Kuang, Linglin; He, Xiao; Bai, Wei; Ding, Yayun; Zhang, Zhi Yong; Zhao, Ye; Chai, Zhifang

doi:10.1016/j.chemosphere.2009.10.050

Cited by 410 publications

(226 citation statements)

References 33 publications

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“…Andersen et al (2016) found that nanoceria alter average root length, and hence root growth was decreased in cabbage and corn, but was promoted in cucumber and onion. Ma et al (2010) only detected a reduction on the root elongation in lettuce but no effect was detected for a suspension of 2000 mg L -1 nanoceria for rape, radish, wheat, cabbage, tomato, and cucumber. All these results suggest that the effects produced on early plant growth of nanoceria is species dependent.…”

Section: Discussionmentioning

confidence: 99%

Nanoceria and bulk cerium oxide effects on the germination of asplenium adiantum-nigrum spores

et al. 2016

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Aim of the study: The effect of cerium oxide engineered nanoparticles on the spore germination of the fern Asplenium adiantumnigrum.Area of study: France, Britanny Region, Finistére Department, Plougonvelin, in rocks near the sea. Material and methods: Asplenium spores were cultured in vitro on agar medium with Nano-CeO 2 (less than 25 nm particle size) and bulk-CeO 2 . The addition of each nano-and bulk particles ranged from 0 to 3000 mg L -1 . Observations on rhizoidal and prothallial cells during first stages of gametophyte development were made. The No-Observed-Adverse-Effect concentration (NOAEC) and Lowest-Observed-Adverse-Effect-Concentration (LOEC) values for spore germination rate data were analyzed.Main results: Germination was speeded up by 100 to 2000 mg L -1 nanoceria, while bulk cerium oxide had the same effect for 500 to 2000 mg L -1 concentrations. Present results showed cellular damage in the protonema while rhizoid cells seemed not to be affected, as growth and membrane integrity remained.Research highlights: Both nanosized and bulk cerium oxide are toxic for the fern Asplenium adiantum-nigrum, although diverse toxicity patterns were shown for both materials. Diverse toxic effects have been observed: chloroplast membrane damage and lysis, cell wall and membrane disruption which leads to cell lysis; and alterations in morphology and development.

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Section: Discussionmentioning

confidence: 99%

Nanoceria and bulk cerium oxide effects on the germination of asplenium adiantum-nigrum spores

et al. 2016

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“…Recently, a similar study, carried out by Ma et al (2010), showed the ability of other types of nanoparticles to induce a biphasic dose-response relationship. As in the previous study, the phytotoxicity of cerium (CeO 2 -NPs), lanthanum (La 2 O 3 -NPs), gadolinium (Gd 2 O 3 -NPs) and ytterbium (Yb 2 O 3 -NPs) oxide nanoparticles was evaluated in several higher plant species by means of root elongation experiments.…”

Section: Iavicoli and Othersmentioning

confidence: 99%

“…To investigate the hazard of titanium dioxide Exposure to lower doses of nanoparticles caused a slight increase of root length whereas, root growth was clearly restricted with increasing concentration Lin and Xing (2007) To evaluate the effects of rare earth oxide nanoparticles on root elongation of plants Cerium, lanthanum, gadolinium and ytterbium oxide nanoparticles Rape 0.2 -2000 mg/L At low concentrations (< 0.8 mg/L) lanthanum and ytterbium nanoparticles had positive effects on root elongation but negative effects at higher concentrations Ma et al (2010) using a three parameter log logistic curve fitting with a hormesis parameter added as described by Brain and Cousens (1989) and with a lack of fit model as described by Cedergreen et al (2005), revealed, for the larger nanoparticles (30 nm), a biphasic relationship with a statistically significant stimulation of the algal growth rate at lower concentrations and an inhibition at higher doses. Recently, a study by Mortimer et al (2010), conducted on the ciliated protozoa Tetrahymena thermophila exposed to 31.25, 62.5, 125, 250 and 500 mg/L of copper nanoparticles (Cu-NPs) and to 1.…”

Section: Iavicoli and Othersmentioning

confidence: 99%

Exposure to Nanoparticles and Hormesis

2010

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ᮀ Nanoparticles are particles with lengths that range from 1 to 100 nm. They are increasingly being manufactured and used for commercial purpose because of their novel and unique physicochemical properties. Although nanotechnology-based products are generally thought to be at a pre-competitive stage, an increasing number of products and materials are becoming commercially available. Human exposure to nanoparticles is therefore inevitable as they become more widely used and, as a result, nanotoxicology research is now gaining attention. However, there are many uncertainties as to whether the unique properties of nanoparticles also pose occupational health risks. These uncertainties arise because of gaps in knowledge about the factors that are essential for predicting health risks such as routes of exposure, distribution, accumulation, excretion and dose-response relationship of the nanoparticles. In particular, uncertainty remains with regard to the nature of the dose-response curve at low level exposures below the toxic threshold. In fact, in the literature, some studies that investigated the biological effects of nanoparticles, observed a hormetic dose-response. However, currently available data regarding this topic are extremely limited and fragmentary. It therefore seems clear that future studies need to focus on this issue by studying the potential adverse health effects caused by low-level exposures to nanoparticles.

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“…As the larger wheat seed has a lower surface-to-volume ratio, the opposite result might have been expected. Indeed, Ma et al [34] found that smaller seeds, e.g. lettuce, were more sensitive to nanoparticles than larger-seeded species such as wheat.…”

mentioning

confidence: 99%

Multiwalled carbon nanotubes in alfalfa and wheat: toxicology and uptake

Miralles

Johnson

Church

et al. 2012

J. R. Soc. Interface.

154

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Data on the bioavailability and toxicity of carbon nanotubes (CNTs) in the environment, and, in particular, on their interactions with vascular plants, are limited. We investigated the effects of industrial-grade multiwalled CNTs (75 wt% CNTs) and their impurities on alfalfa and wheat. Phytotoxicity assays were performed during both seed germination and seedling growth. The germinations of both species were tolerant of up to 2560 mg l 21 CNTs, and root elongation was enhanced in alfalfa and wheat seedlings exposed to CNTs. Remarkably, catalyst impurities also enhanced root elongation in alfalfa seedlings as well as wheat germination. Thus the impurities, not solely the CNTs, impacted the plants. CNT internalization by plants was investigated using electron microscopy and two-dimensional Raman mapping. The latter showed that CNTs were adsorbed onto the root surfaces of alfalfa and wheat without significant uptake or translocation. Electron microscopy investigations of internalization were inconclusive owing to poor contrast, so Fe 3 O 4 -functionalized CNTs were prepared and studied using energyfilter mapping of Fe 3 O 4 . CNTs bearing Fe 3 O 4 nanoparticles were detected in the epidermis of one wheat root tip only, suggesting that internalization was possible but unusual. Thus, alfalfa and wheat tolerated high concentrations of industrial-grade multiwalled CNTs, which adsorbed onto their roots but were rarely taken up.

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Effects of rare earth oxide nanoparticles on root elongation of plants

Cited by 410 publications

References 33 publications

Nanoceria and bulk cerium oxide effects on the germination of asplenium adiantum-nigrum spores

Nanoceria and bulk cerium oxide effects on the germination of asplenium adiantum-nigrum spores

Exposure to Nanoparticles and Hormesis

Multiwalled carbon nanotubes in alfalfa and wheat: toxicology and uptake

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