Alleviation of nitrogen stress in rice (<i>Oryza sativa</i>) by ceria nanoparticles

Wang, Yaoyao; Zhang, Peng; Li, Mingshu; Guo, Zhiling; Ullah, Sami; Rui, Yukui; Lynch, Iseult

doi:10.1039/d0en00757a

Cited by 56 publications

(43 citation statements)

References 45 publications

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“…[ 27 ] Plants can adjust their phytohormone levels to cope with ambient stress such as that caused by NMs exposure. [ 28 ] Recent studies also showed that CuO and Cu 3 (PO 4 ) 2 can protect soybean plants from sudden death syndrome by modulation of nutritional and phytohormone levels. [28b] CeO 2 NMs also showed alleviation of plant stress caused by nitrogen deficiency or excess by modulation of the antioxidant system and phytohormones.…”

Section: Discussionmentioning

confidence: 99%

Stress Response and Nutrient Homeostasis in Lettuce (Lactuca sativa) Exposed to Graphene Quantum Dots Are Modulated by Particle Surface Functionalization

Zhang

Guo

et al. 2021

Advanced Biology

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A 5‐d germination assay and a 14‐d hydroponic trial are performed to evaluate the impacts of graphene quantum dots (GQDs) on lettuce. Results show that GQDs are toxic to lettuce plants and that the effects are highly dependent on particle surface functionalization and plant growth stage. The germination rate is not affected by aminated GQDs (N‐GQDs) and carboxylated GQDs (C‐GQDs) but is reduced by hydroxylated GQDs (O‐GQDs) by 39–71%. During the hydroponic trial, N‐GQDs (50 mg L−1) increase the root dry weight by 34%, while C‐GQDs and O‐GQDs reduce it by 39% and 43%, respectively. Shoot dry weight is not affected by N‐GQDs but is reduced by C‐GQDs (44%) and O‐GQDs (36–55%) treatments. C‐GQDs and O‐GQDs cause oxidative damage, disruption of mineral and organic nutrients homeostasis, impairment of photosynthesis, and modulates the levels of phytohormones. Light‐triggered reactive oxygen species generation and oxidation of antioxidants in plants are the critical reason for the phytotoxicity and explain the difference between the different functionalizations. These findings suggest that GQDs may not be as safe as expected. Future studies should consider the modulation of surface chemistry to achieve optimal safety of GQDs, and more plant species should be tested over a longer‐term scale.

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Section: Discussionmentioning

confidence: 99%

Stress Response and Nutrient Homeostasis in Lettuce (Lactuca sativa) Exposed to Graphene Quantum Dots Are Modulated by Particle Surface Functionalization

Zhang

Guo

et al. 2021

Advanced Biology

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“…For example, Hao et al reported that the C:N ratio of rice roots increased significantly with the addition of CNTs, which was mainly due to the decrease of N absorption. Another study found that ceria NMs enhanced the activities of key enzyme involved in N assimilation, including GOGAT, GS, and glutamate dehydrogenase (GDH), accounting for the increase of N content in rice . Lahiani et al showed that the photosynthetic electron transfer and CO 2 assimilation in corn leaves were enhanced by 40 mg/L MWCNTs, and the photosynthetic capacity was increased by 10%.…”

Section: Introductionmentioning

confidence: 99%

Multi-Wall Carbon Nanotubes Promote the Growth of Maize (Zea mays) by Regulating Carbon and Nitrogen Metabolism in Leaves

Zhang

Xing

et al. 2021

J. Agric. Food Chem.

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Previous studies have suggested that multiwalled carbon nanotubes (MWCNTs) promote plant growth; however, the mechanism is yet to be fully understood. In this study, the effects of MWCNTs (20, 100, and 500 mg/L) on the carbon (C) and nitrogen (N) metabolism in maize were studied to explore the molecular mechanism of the action of MWCNTs on plants. The results showed that 100 mg/L MWCNTs increased the shoot fresh and dry weight, root fresh weight, and seedling length while other doses showed no significant effects. Further studies showed that 100 mg/L MWCNTs increased the chlorophyll content, transpiration rate, stomatal conductance, and intercellular CO2 concentration, by 50.6%, 60.8%, 47.2%, and 32.1%, respectively. Activities of key enzymes including sucrose synthase (SS), sucrose phosphate synthase (SPS) and phosphoenolpyruvate carboxylase (PEPC) that are involved in the carbon metabolism, and nitrate reductase (NR), glutamine synthetase (GS), and glutamate synthetase (GOGAT) that are involved in N metabolism, were all upregulated by 100 mg/L MWCNTs, which contributed to the increase of the accumulation of carbohydrates (sugar and starch), soluble protein, and N in plants. These findings suggest that MWCNTs can improve plant growth by regulating the key enzymes involved in C and N metabolism thereby enhancing the carbohydrate production and the use of N and improving plant growth. This study provides significant insights into the molecular mechanism of the positive effects of MWCNTs on plants and provide a basis for the agricultural application of MWCNTs.

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“…However, at high concentrations, ceria NPs inhibited plant growth in the absence of stress in the hydroponic culture. Therefore, ceria NPs can exert positive effects but their concentration needs to be monitored carefully [ 138 ]. Furthermore, it has been postulated that nanosized ceria may interfere with plant–bacteria interactions at the root level, as demonstrated in a study on nitrogen-fixing symbiotic organisms [ 139 ].…”

Section: (Bio)applicationsmentioning

confidence: 99%

Nanostructured Ceria: Biomolecular Templates and (Bio)applications

et al. 2021

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Ceria (CeO2) nanostructures are well-known in catalysis for energy and environmental preservation and remediation. Recently, they have also been gaining momentum for biological applications in virtue of their unique redox properties that make them antioxidant or pro-oxidant, depending on the experimental conditions and ceria nanomorphology. In particular, interest has grown in the use of biotemplates to exert control over ceria morphology and reactivity. However, only a handful of reports exist on the use of specific biomolecules to template ceria nucleation and growth into defined nanostructures. This review focusses on the latest advancements in the area of biomolecular templates for ceria nanostructures and existing opportunities for their (bio)applications.

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Alleviation of nitrogen stress in rice (Oryza sativa) by ceria nanoparticles

Abstract: This study explored the potential of ceria nanoparticles (CeO2 NPs) to alleviate stress in hydroponic rice caused by low N (LN) and high N (HN) stresses. N contents in plant...

Cited by 56 publications

References 45 publications

Stress Response and Nutrient Homeostasis in Lettuce (Lactuca sativa) Exposed to Graphene Quantum Dots Are Modulated by Particle Surface Functionalization

Stress Response and Nutrient Homeostasis in Lettuce (Lactuca sativa) Exposed to Graphene Quantum Dots Are Modulated by Particle Surface Functionalization

Multi-Wall Carbon Nanotubes Promote the Growth of Maize (Zea mays) by Regulating Carbon and Nitrogen Metabolism in Leaves

Nanostructured Ceria: Biomolecular Templates and (Bio)applications

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