Using Synchrotron-Based Approaches To Examine the Foliar Application of ZnSO<sub>4</sub> and ZnO Nanoparticles for Field-Grown Winter Wheat

Zhang, Teng; Sun, Hongda; Lv, Zhiyuan; Cui, Lili; Mao, Hui; Kopittke, Peter M.

doi:10.1021/acs.jafc.7b04153

Cited by 115 publications

(86 citation statements)

References 54 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…ZnO-NPs of similar shapes as obtained in this study have previously been observed, and aggregation of ZnO-NPs when suspended in water is also documented (see for e.g., Dimkpa et al, 2012a;Zhang et al, 2018). However, aggregation could also have resulted from drying of the suspension on the TEM grid.…”

Section: Discussionsupporting

confidence: 84%

“…Therefore, as demonstrated for the first time in the present study for ZnO-NPs, coating of urea with Zn represents a clear strategy for facilitating the delivery of Zn into plants, even at relatively low Zn rates, and irrespective of soil water status. Plausibly, the speciation of Zn in the NPexposed plants, though not assessed in this study, is likely to be Zn-phosphate, given other reports involving ZnO-NPs and wheat (Dimkpa et al, 2013;Zhang et al, 2018). We observed no effect of Zn treatment on N and P accumulation in the wheat plants.…”

Section: Discussionmentioning

confidence: 42%

“…The contrasting (toxic vs. beneficial) effects of ZnO-NPs suggest they can be used as plant fertilizer if supplied at judicious doses. Accordingly, in the context of agriculture and human and environmental health, ZnO-NPs are being systematically assessed in plants for their enhanced ability to modulate productivity and nutrient use efficiency; confer tolerance to biotic and abiotic stresses; and fortify edible plant parts with Zn (Elmer and White, 2016;Raliya et al, 2016;Dimkpa et al, 2017a;Dimkpa et al, 2017b;Elmer et al, 2018;Dimkpa et al, 2018b;Zhang et al, 2018;Adisa et al, 2019;Dimkpa et al, 2019a;Dimkpa et al, 2019b).…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Facile Coating of Urea With Low-Dose ZnO Nanoparticles Promotes Wheat Performance and Enhances Zn Uptake Under Drought Stress

et al. 2020

View full text Add to dashboard Cite

Zinc oxide nanoparticles (ZnO-NPs) hold promise as novel fertilizer nutrients for crops. However, their ultra-small size could hinder large-scale field application due to potential for drift, untimely dissolution or aggregation. In this study, urea was coated with ZnO-NPs (1%) or bulk ZnO (2%) and evaluated in wheat (Triticum aestivum L.) in a greenhouse, under drought (40% field moisture capacity; FMC) and non-drought (80% FMC) conditions, in comparison with urea not coated with ZnO (control), and urea with separate ZnO-NP (1%) or bulk ZnO (2%) amendment. Plants were exposed to ≤ 2.17 mg/kg ZnO-NPs and ≤ 4.34 mg/kg bulk-ZnO, indicating exposure to a higher rate of Zn from the bulk ZnO. ZnO-NPs and bulk-ZnO showed similar urea coating efficiencies of 74-75%. Drought significantly (p ≤ 0.05) increased time to panicle initiation, reduced grain yield, and inhibited uptake of Zn, nitrogen (N), and phosphorus (P). Under drought, ZnO-NPs significantly reduced average time to panicle initiation by 5 days, irrespective of coating, and relative to the control. In contrast, bulk ZnO did not affect time to panicle initiation. Compared to the control, grain yield increased significantly, 51 or 39%, with ZnO-NP-coated or uncoated urea. Yield increases from bulk-ZnO-coated or uncoated urea were insignificant, compared to both the control and the ZnO-NP treatments. Plant uptake of Zn increased by 24 or 8% with coated or uncoated ZnO-NPs; and by 78 or 10% with coated or uncoated bulk-ZnO. Under non-drought conditions, Zn treatment did not significantly reduce panicle initiation time, except with uncoated bulk-ZnO. Relative to the control, ZnO-NPs (irrespective of coating) significantly increased grain yield; and coated ZnO-NPs enhanced Zn uptake significantly. Zn fertilization did not significantly affect N and P uptake, regardless of particle size or coating. Collectively, these findings demonstrate that coating urea with ZnO-NPs enhances plant performance and Zn accumulation, thus potentiating field-scale deployment of nano-scale micronutrients. Notably, lower Zn inputs

show abstract

Section: Discussionsupporting

confidence: 84%

Section: Discussionmentioning

confidence: 42%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Facile Coating of Urea With Low-Dose ZnO Nanoparticles Promotes Wheat Performance and Enhances Zn Uptake Under Drought Stress

et al. 2020

View full text Add to dashboard Cite

show abstract

“…Fortification of Zn in crops can significantly improve crop yield and nutrient quality as well as human health , Zhang et al, 2018. This can be achieved through both genetic practices (e.g.…”

Section: Overcoming Zn Deficiency In Cropsmentioning

confidence: 99%

“…It is estimated that approximately one third of the world's human population suffers from Zn deficiency (Cakmak et al 2010). Foliar Zn fertilisation is being increasingly used (Fernández et al 2013), and it has proven to be a promising Zn biofortification approach for increasing Zn bioavailability in agricultural commodities Zhang et al 2018). Foliar fertilisation is particularly useful when soil conditions limit availability of soil applied Zn, for example, in soils with free CaCO3 or soils with high pH (Alloway 2009).…”

Section: Papermentioning

confidence: 99%

Absorption and translocation of Zn foliar fertilisers

Cui¹

View full text Add to dashboard Cite

Crop Zn deficiency is associated with low Zn availability in soils and is a widespread problem, also resulting in human Zn deficiency. Foliar Zn fertilisation has been shown to be an efficient approach for overcoming this problem. However, the mechanisms by which Zn moves across the leaf surface (penetration across the cuticle and epidermal cells and into the underlying tissues) and is subsequently translocated remain unclear, with this being the main focus of the present research. Specifically, using ZnSO4 and nano-ZnO, the roles of leaf cuticle, trichomes, and stomata in foliar Zn absorption were examined, with the distribution and the speciation of the absorbed Zn in the leaves determined. In addition, the influence of plant Zn status on foliar Zn absorption was also examined. The first experiment aimed to obtain a general understanding of the effects of leaf properties on the foliar absorption of Zn. Methyl jasmonate (MeJA) (0, 0.1, 0.5, 1, and 2.5 mM) was applied to leaves of soybean (Glycine max), sunflower (Helianthus annuus), and tomato (Solanum lycopersicum) to alter leaf properties. It was found for all three plant species that treating of MeJA caused substantial increases (1.3-3.5-times higher) in leaf trichome density, and the hydrophobicity of the adaxial leaf surface. The changes in stomatal density and leaf cuticle thickness varied with plant species and MeJA concentration. Based upon these results, the second experiment used 0 (control) and 1 mM MeJA treatments to examine the effects of changes in leaf properties on the absorption of foliar-applied Zn, Mn, and Fe, using synchrotron-based X-ray fluorescence microscopy (µ-XRF) to examine the distribution of elements in situ within hydrated leaves. Interestingly, foliar absorption of Zn, Mn, and Fe increased up to 3-to 5-fold in sunflower leaves treated with 1 mM MeJA, but decreased by 0.5-to 0.9-fold in leaves of tomato treated with 1 mM MeJA. It was found that these changes were related to the thickness of the cuticle and epidermal cell wall, suggesting that the cuticle is important for absorption of foliar-applied nutrients. However, subsequent translocation of the absorbed Zn, Mn, and Fe within the leaf tissues was limited (moving < 1.3 mm in 6 h) irrespective of the plant species and treatment. Of the three nutrients, Zn was translocated a greater distance within the vein than in the interveinal tissues (being translocated ca. twofold further). The third experiment gave specific consideration to the role of trichomes in foliar Zn absorption. Using µ-XRF for the in situ analyses of nutrient distribution in leaves of soybean and tomato, it was found that upon the foliar-application of ZnSO4, Zn accumulated in some spectroscopy (XAS) analyses showed that the Zn in the leaves following foliar application was mostly present as Zn phytate (37-53%) in Zn sufficient leaves, but as Zn phosphate (about 55%) in Zn deficient leaves. Across several of the experiments described above, the foliar absorption of ZnSO4 and nano-ZnO were compared. It was found tha...

show abstract

Strategies to Counter Zinc Deficiency, Current Status and Future Directions

Khan

2021

Microbial Biofertilizers and Micronutrient Availability

View full text Add to dashboard Cite

Zinc deficiency in humans is caused by a range of problems associated from soil to plants and to human beings. Coordinated efforts of the international community, especially policymakers, agricultural and plant scientists, dieticians, physicians and others, are required to address a variety of issues responsible for global hidden hunger of micronutrient deficiency. Among some of the most important approaches are zinc biofortification of the cereal crops using zinc biofertilizers and the development of zinc-efficient crops. The use of zinc biofertilizers is one of the most effective, sustainable and economic ways to improve the zinc status of the soil to grow zinc-dense cereals. Zinc-dense cereals developed through biofortification should be made available to populations that are mainly dependent on cerealbased diet. Dieticians and scientists should make efforts to encourage diversification of diet and to use zinc supplements to meet the requirement. One study suggests that including fishes in the diet can help to overcome micronutrient deficiency globally. People should also be convinced to shun food beliefs and taboos to combat micronutrient deficiency. Strategies to improve zinc absorption in humans should also be developed. Notably, wheat with reduced phytate content in the grains was developed with an aim to maximize zinc absorption in the intestine. Awareness programmes in areas suffering the most from zinc deficiency should be carried out among all stakeholders. Despite the suggestions from FAO and WHO, global efforts to combat zinc deficiency matching those for combating HIV, etc., are not in place.

show abstract

Using Synchrotron-Based Approaches To Examine the Foliar Application of ZnSO₄ and ZnO Nanoparticles for Field-Grown Winter Wheat

Cited by 115 publications

References 54 publications

Facile Coating of Urea With Low-Dose ZnO Nanoparticles Promotes Wheat Performance and Enhances Zn Uptake Under Drought Stress

Facile Coating of Urea With Low-Dose ZnO Nanoparticles Promotes Wheat Performance and Enhances Zn Uptake Under Drought Stress

Absorption and translocation of Zn foliar fertilisers

Strategies to Counter Zinc Deficiency, Current Status and Future Directions

Contact Info

Product

Resources

About

Using Synchrotron-Based Approaches To Examine the Foliar Application of ZnSO4 and ZnO Nanoparticles for Field-Grown Winter Wheat

Cited by 115 publications

References 54 publications

Facile Coating of Urea With Low-Dose ZnO Nanoparticles Promotes Wheat Performance and Enhances Zn Uptake Under Drought Stress

Facile Coating of Urea With Low-Dose ZnO Nanoparticles Promotes Wheat Performance and Enhances Zn Uptake Under Drought Stress

Absorption and translocation of Zn foliar fertilisers

Strategies to Counter Zinc Deficiency, Current Status and Future Directions

Contact Info

Product

Resources

About

Using Synchrotron-Based Approaches To Examine the Foliar Application of ZnSO₄ and ZnO Nanoparticles for Field-Grown Winter Wheat