Molecular basis of cerium oxide nanoparticle enhancement of rice salt tolerance and yield

2021 ◽  
Author(s):  
Heng Zhou ◽  
Honghong Wu ◽  
Feng Zhang ◽  
Ye Su ◽  
Wenxue Guan ◽  
...  
Keyword(s):  
Nitric Oxide ◽  
Salt Tolerance ◽  
Cerium Oxide ◽  
Molecular Basis ◽  
Nitrate Reductase Activity ◽  
Reductase Activity ◽  
Cerium Oxide Nanoparticles ◽  
Oxide Nanoparticles ◽  
Nitric Oxide Production ◽  
Oxide Nanoparticle

Cerium oxide nanoparticles enhance rice salt tolerance and yield via modulating nitrate reductase activity to improve nitric oxide production.

Fibro-porous PLLA/gelatin composite membrane doped with cerium oxide nanoparticles as bioactive scaffolds for future angiogenesis

2020 ◽  
Vol 8 (39) ◽  
pp. 9110-9120
Author(s):  
Zhiyang Xu ◽  
Yulong Xu ◽  
Papia Basuthakur ◽  
Chitta Ranjan Patra ◽  
Seeram Ramakrishna ◽  
...  
Keyword(s):  
Lactic Acid ◽  
Cerium Oxide ◽  
Composite Membrane ◽  
Composite Membranes ◽  
Cerium Oxide Nanoparticles ◽  
Oxide Nanoparticles ◽  
Bioactive Scaffolds ◽  
Oxide Nanoparticle ◽  
Porous Poly

Functionalized cerium oxide nanoparticle (CeNP)-loaded fibro-porous poly-l-lactic acid (PLLA)/gelatin composite membranes were prepared via electrospinning

Cerium oxide nanoparticles scavenge nitric oxide radical (˙NO)

2012 ◽  
Vol 48 (40) ◽  
pp. 4896 ◽  
Author(s):  
Janet M. Dowding ◽  
Talib Dosani ◽  
Amit Kumar ◽  
Sudipta Seal ◽  
William T. Self
Keyword(s):  
Nitric Oxide ◽  
Cerium Oxide ◽  
Cerium Oxide Nanoparticles ◽  
Oxide Nanoparticles ◽  
Nitric Oxide Radical

scholarly journals Cerium Oxide Nanoparticles Improve Cotton Salt Tolerance by Enabling Better Ability to Maintain Cytosolic K+/Na+ Ratio

2021 ◽  
Author(s):  
Jiahao Liu ◽  
Guangjing Li ◽  
Linlin Chen ◽  
Jiangjiang Gu ◽  
Honghong Wu ◽  
...  
Keyword(s):  
Salt Tolerance ◽  
Cerium Oxide ◽  
Salinity Stress ◽  
Agricultural Production ◽  
Cerium Oxide Nanoparticles ◽  
Control Group ◽  
Oxide Nanoparticles ◽  
Plant Tolerance ◽  
True Leaf ◽  
Cotton Plants

Abstract BackgroundSalinity is a worldwide factor limiting the agricultural production. Cotton is an important cash crop; however, its yield and product quality are negatively affected by salinity. Using nanomaterials such as cerium oxide nanoparticles (nanoceria) to improve plant tolerance to stresses, e.g. salinity, is an emerged approach in agricultural production. Nevertheless, to date, our knowledge about the role of nanoceria in cotton salt response and the behind mechanisms is still rare. ResultsWe found that PNC (poly acrylic acid coated nanoceria) helped to improve cotton plant tolerance to salinity, showing the better phenotypic performance, the higher chlorophyll content and biomass, and the better photosynthetic performance in PNC treated cotton plants than the control group. Under salinity stress, in consistent to the results of the enhanced antioxidant enzyme activities, PNC treated cotton plants showed significant lower MDA content and ROS level than the control group, both in the first and second true leaf. Further experiments showed that under salinity stress, PNC treated cotton plants had significant higher cytosolic K+ and lower cytosolic Na+ fluorescent intensity in both the first and second true leaf than the control group. This is further confirmed by the leaf ion content analysis, showed that PNC treated cotton plants maintained significant higher leaf K+ and lower leaf Na+ content, and thus the higher K+/Na+ ratio than the control plants under salinity. Whereas no significant increase of vacuolar Na+ intensity was observed in PNC treated plants than the control under salinity, suggesting that PNC enhanced leaf K+ retention and leaf Na+ exclusion, but not leaf vacuolar Na+ sequestration are the main mechanisms behind the PNC improved cotton salt tolerance. qPCR results showed that under salinity stress, the modulation of HKT1 but not SOS1 refers more to the PNC improved cotton leaf Na+ exclusion than the control. ConclusionsNanoceria enhanced leaf K+ retention and Na+ exclusion, but not vacuolar Na+ sequestration are the main mechanisms behind the nanoceria improved cotton salt tolerance. Our results add more knowledge for better understanding the complexity of plant-nanoceria interaction in terms of nano-enabled plant stress tolerance.

scholarly journals Cerium oxide nanoparticles improve cotton salt tolerance by enabling better ability to maintain cytosolic K+/Na+ ratio

2021 ◽  
Vol 19 (1) ◽  
Author(s):  
Jiahao Liu ◽  
Guangjing Li ◽  
Linlin Chen ◽  
Jiangjiang Gu ◽  
Honghong Wu ◽  
...  
Keyword(s):  
Salt Tolerance ◽  
Cerium Oxide ◽  
Salinity Stress ◽  
Agricultural Production ◽  
Cerium Oxide Nanoparticles ◽  
Control Group ◽  
Oxide Nanoparticles ◽  
Cotton Leaf ◽  
Fluorescent Intensity ◽  
Cotton Plants

Abstract Background Salinity is a worldwide factor limiting the agricultural production. Cotton is an important cash crop; however, its yield and product quality are negatively affected by soil salinity. Use of nanomaterials such as cerium oxide nanoparticles (nanoceria) to improve plant tolerance to stress conditions, e.g. salinity, is an emerged approach in agricultural production. Nevertheless, to date, our knowledge about the role of nanoceria in cotton salt response and the behind mechanisms is still rare. Results We found that PNC (poly acrylic acid coated nanoceria) helped to improve cotton tolerance to salinity, showing better phenotypic performance, higher chlorophyll content (up to 68% increase) and biomass (up to 38% increase), and better photosynthetic performance such as carbon assimilation rate (up to 144% increase) in PNC treated cotton plants than the NNP (non-nanoparticle control) group. Under salinity stress, in consistent to the results of the enhanced activities of antioxidant enzymes, PNC treated cotton plants showed significant lower MDA (malondialdehyde, up to 44% decrease) content and reactive oxygen species (ROS) level such as hydrogen peroxide (H2O2, up to 79% decrease) than the NNP control group, both in the first and second true leaves. Further experiments showed that under salinity stress, PNC treated cotton plants had significant higher cytosolic K+ (up to 84% increase) and lower cytosolic Na+ (up to 77% decrease) fluorescent intensity in both the first and second true leaves than the NNP control group. This is further confirmed by the leaf ion content analysis, showed that PNC treated cotton plants maintained significant higher leaf K+ (up to 84% increase) and lower leaf Na+ content (up to 63% decrease), and thus the higher K+/Na+ ratio than the NNP control plants under salinity stress. Whereas no significant increase of mesophyll cell vacuolar Na+ intensity was observed in PNC treated plants than the NNP control under salinity stress, suggesting that the enhanced leaf K+ retention and leaf Na+ exclusion, but not leaf vacuolar Na+ sequestration are the main mechanisms behind PNC improved cotton salt tolerance. qPCR results showed that under salinity stress, the modulation of HKT1 but not SOS1 refers more to the PNC improved cotton leaf Na+ exclusion than the NNP control. Conclusions PNC enhanced leaf K+ retention and Na+ exclusion, but not vacuolar Na+ sequestration to enable better maintained cytosolic K+/Na+ homeostasis and thus to improve cotton salt tolerance. Our results add more knowledge for better understanding the complexity of plant-nanoceria interaction in terms of nano-enabled plant stress tolerance. Graphic abstract

Polyacrylic Acid Modified Cerium Oxide Nanoparticles: Synthesis and Characterization as a Peroxidase Mimic for Non-Enzymatic H2O2 Sensor

2020 ◽  
Vol 16 (5) ◽  
pp. 816-828
Author(s):  
Gurdeep Rattu ◽  
Nishtha Khansili ◽  
Prayaga M. Krishna
Keyword(s):  
Hydrogen Peroxide ◽  
Cerium Oxide ◽  
Polyacrylic Acid ◽  
Spectroscopic Analysis ◽  
Cerium Oxide Nanoparticles ◽  
Oxide Nanoparticles ◽  
Peroxidase Mimic ◽  
Ft Ir ◽  
H2o2 Sensing ◽  
Fluorescence Spectrometer

Background: Cerium oxide nanoparticles (nanoceria) are efficient free-radical scavengers due to their dual valence state and thus exhibit optical and catalytic properties. Therefore, the main purpose of this work was to understand the peroxidase mimic activity of polymer-stabilized nanoceria for enzyme-less H2O2 sensing by fluorescence spectrometer. Objective: This research revealed the development of fluorescence hydrogen peroxide nanosensor based on the peroxidase-like activity of polyacrylic acid stabilized nanoceria (PAA-CeO2 Nps). Methods: PAA-CeO2 Nps were synthesized by simple cross-linking reaction at a low temperature and characterized by XRD, SEM, Zeta potential, TGA, FT-IR and UV-VIS spectroscopic analysis. H2O2 sensing was performed by a fluorescence spectrometer. Results:: The synthesized polymer nanocomposite was characterized by XRD, SEM, TGA, FT-IR and UV-VIS spectroscopic analysis. The XRD diffraction patterns confirmed the polycrystalline nature and SEM micrograph showed nanoparticles having hexagonal symmetry and crystallite size of 32 nm. The broad peak of Ce–O bond appeared at 508 cm-1. UV-VIS measurements revealed a welldefined absorbance peak around 315 nm and an optical band-gap of 3.17 eV. As synthesized PAACeO2 Nps effectively catalysed the decomposition of hydrogen peroxide (H2O2) into hydroxyl radicals. Then terephthalic acid was oxidized by hydroxyl radical to form a highly fluorescent product. Under optimized conditions, the linear range for determination of hydrogen peroxide was 0.01 - 0.2 mM with a limit of detection (LOD) of 1.2 μM. Conclusion: The proposed method is ideally suited for the sensing of H2O2 at a low cost and this detection system enabled the sensing of analytes (sugars), which can enzymatically generate hydrogen peroxide.

Radiosensitizing Effect of Cerium Oxide Nanoparticles on Human Leukemia Cells

2018 ◽  
Vol 6 (2) ◽  
pp. 111-115 ◽  
Author(s):  
Azadeh Montazeri ◽  
Zohreh Zal ◽  
Arash Ghasemi ◽  
Hooman Yazdannejat ◽  
Hossein Asgarian-Omran ◽  
...  
Keyword(s):  
Cerium Oxide ◽  
Leukemia Cells ◽  
Cerium Oxide Nanoparticles ◽  
Oxide Nanoparticles ◽  
Human Leukemia ◽  
Radiosensitizing Effect ◽  
Human Leukemia Cells

Cerium oxide nanoparticles acts as a novel therapeutic agent for ulcerative colitis through anti-oxidative mechanism

Life Sciences ◽  
2021 ◽  
pp. 119500
Author(s):  
Fereshteh Asgharzadeh ◽  
Alireza Hashemzadeh ◽  
Farzad Rahmani ◽  
Atieh Yaghoubi ◽  
Seyedeh Elnaz Nazari ◽  
...  
Keyword(s):  
Ulcerative Colitis ◽  
Cerium Oxide ◽  
Therapeutic Agent ◽  
Cerium Oxide Nanoparticles ◽  
Oxide Nanoparticles ◽  
Novel Therapeutic
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