The impact of cerium oxide nanoparticles on the salt stress responses of Brassica napus L.

The present study aimed to evaluate the potentiality of three seaweeds, which belong to different algal taxa (green alga Ulva lactuca Linnaeus, brown alga Cystoseira spp., and red alga Gelidium crinale (Hare ex Turner) Gaillon) as bio-fertilizers to improve the growth and yield of canola (Brassica napus L.) plants under greenhouse conditions. Furthermore, the impact of seaweeds in alleviating the effects of salt stress (75 and 150 mM NaCl) on canola plants was also investigated. The three examined seaweeds (applied as soil amendments) successfully alleviated the harmful effects of salinity on canola plants by significantly reducing the inhibition of chlorophyll a, b, total carbohydrate accumulation, and growth promoting hormones, while increasing antioxidative compounds, such as phenols, flavonoids, anthocyanin, and osmoprotectants, including total carbohydrates and proline. Phytochemical analysis of the three examined seaweeds suggests that their stimulatory effect on growth and productivity under normal and salinity growth conditions may be linked to their constituents of a wide variety of growth promotive hormones, including indole acetic acid, indole butyric acid, gibberellic acid, cytokinins, total carbohydrates, and phenolic compounds. U. lactuca was found to be the best candidate to be used as a bio-fertilizer to improve canola growth, yield, and salt stress tolerance.

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The impact of cerium oxide nanoparticles on tomato (Solanum lycopersicum L.) and its implications for food safety

Metallomics ◽

10.1039/c2mt20149f ◽

2012 ◽

Vol 4 (10) ◽

pp. 1105 ◽

Cited By ~ 137

Author(s):

Qiang Wang ◽

Xingmao Ma ◽

Wen Zhang ◽

Haochun Pei ◽

Yongsheng Chen

Keyword(s):

Food Safety ◽

Solanum Lycopersicum ◽

Cerium Oxide ◽

Cerium Oxide Nanoparticles ◽

Oxide Nanoparticles ◽

Solanum Lycopersicum L ◽

The Impact

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Toxicity Study of Cerium Oxide Nanoparticles in Human Neuroblastoma Cells

International Journal of Toxicology ◽

10.1177/1091581814522305 ◽

2014 ◽

Vol 33 (2) ◽

pp. 86-97 ◽

Cited By ~ 64

Author(s):

Monika Kumari ◽

Shailendra Pratap Singh ◽

Srinivas Chinde ◽

Mohammed Fazlur Rahman ◽

Mohammed Mahboob ◽

...

Keyword(s):

Cerium Oxide ◽

Stress Responses ◽

Neuroblastoma Cell ◽

Neuroblastoma Cells ◽

Safety Evaluation ◽

Neuroblastoma Cell Line ◽

Cerium Oxide Nanoparticles ◽

Oxide Nanoparticles ◽

Human Neuroblastoma Cell ◽

Human Neuroblastoma

The present study consisted of cytotoxic, genotoxic, and oxidative stress responses of human neuroblastoma cell line (IMR32) following exposure to different doses of cerium oxide nanoparticles (CeO2 NPs; nanoceria) and its microparticles (MPs) for 24 hours. Cytotoxicity was evaluated by 3-[4,5-dimethylthiazol-2-yl]-2,5-diphenyl tetrazolium bromide and lactate dehydrogenase assays whereas genotoxicity was assessed using the cytokinesis-block micronucleus and comet assays. A battery of assays including lipid peroxidation, reactive oxygen species (ROS), hydrogen peroxide, reduced glutathione, nitric oxide, glutathione reductase, glutathione peroxidase, superoxide dismutase, catalase, and glutathione S-transferase were performed to test the hypothesis that ROS was responsible for the toxicity of nanoceria. The results showed that nanosized CeO2 was more toxic than cerium oxide MPs. Hence, further study on safety evaluation of CeO2 NPs on other models is recommended.

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Cerium Oxide Nanoparticles Affect Heavy Metals Uptake by Pea in a Divergent Way than Their Ionic and Bulk Counterparts

Water Air & Soil Pollution ◽

10.1007/s11270-019-4296-5 ◽

2019 ◽

Vol 230 (10) ◽

Cited By ~ 5

Author(s):

Elżbieta Skiba ◽

Wojciech M. Wolf

Keyword(s):

Plant Growth ◽

Cerium Oxide ◽

Metal Uptake ◽

Cerium Nitrate ◽

Cerium Oxide Nanoparticles ◽

Oxide Nanoparticles ◽

The Impact ◽

Heavy Metals Uptake ◽

Level Analysis ◽

Cerium Compounds

Abstract The impact of cerium oxide nanoparticles, bulk cerium oxide and ionic cerium nitrate on the plant development as well as the uptake and further translocation of Cu, Mn, Zn and Fe by sugar pea (Pisum sativum L.) was investigated. Plants were cultivated in the laboratory pot experiments using the modified Hoagland solutions supplemented with cerium compounds at the 200 mg L−1 Ce level. Analysis of variance proved that cerium oxide nanoparticles significantly decreased Cu, Mn, Zn and Fe concentrations in roots and above ground parts of the pea plants. The latter ions are presumably transported via symplastic pathways and may compete with nanoparticles for similar carriers. The lowest impact on the plant growth and the metal uptake was observed under the bulk CeO2 treatment. On the contrary, strongest interactions were observed for supplementation with ionic cerium nitrate. The highly beneficial effect of cerium oxide nanoparticles on the plant growth was not supported by this study. The latter conclusion is of particular relevance when environmental impact of cerium compounds on the waste management, municipal urban low emissions and food production is to be concerned.

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Gradual Exposure to Salinity Improves Tolerance to Salt Stress in Rapeseed (Brassica napus L.)

Water ◽

10.3390/w11081667 ◽

2019 ◽

Vol 11 (8) ◽

pp. 1667 ◽

Cited By ~ 4

Author(s):

Michael Santangeli ◽

Concetta Capo ◽

Simone Beninati ◽

Fabrizio Pietrini ◽

Cinzia Forni

Keyword(s):

Salt Stress ◽

Brassica Napus ◽

Salt Tolerance ◽

Soil Salinity ◽

Stress Responses ◽

Prolonged Exposure ◽

Relative Reduction ◽

Brassica Napus L ◽

Salt Stress Response ◽

Psii Photochemistry

Soil salinity is considered one of the most severe abiotic stresses in plants; plant acclimation to salinity could be a tool to improve salt tolerance even in a sensitive genotype. In this work we investigated the physiological mechanisms underneath the response to gradual and prolonged exposure to sodium chloride in cultivars of Brassica napus L. Fifteen days old seedlings of the cultivars Dynastie (salt tolerant) and SY Saveo (salt sensitive) were progressively exposed to increasing soil salinity conditions for 60 days. Salt exposed plants of both cultivars showed reductions of biomass, size and number of leaves. However, after 60 days the relative reduction in biomass was lower in sensitive cultivar as compared to tolerant ones. An increase of chlorophylls content was detected in both cultivars; the values of the quantum efficiency of PSII photochemistry (ΦPSII) and those of the electron transport rate (ETR) indicated that the photochemical activity was only partially reduced by NaCl treatments in both cultivars. Ascorbate peroxidase (APX) activity was higher in treated samples with respect to the controls, indicating its activation following salt exposure, and confirming its involvement in salt stress response. A gradual exposure to salt could elicit different salt stress responses, thus preserving plant vitality and conferring a certain degree of tolerance, even though the genotype was salt sensitive at the seed germination stage. An improvement of salt tolerance in B. napus could be obtained by acclimation to saline conditions.

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