Tolerance to Zinc Deficiency in Rice Correlates with Zinc Uptake and Translocation

The duration of inhibition of zinc uptake by chlorsulfuron was examined in wheat plants in a glasshouse experiment. Chlorsulfuron decreased shoot weight, root weight and zinc uptake. Plants that were treated with chlorsulfuron and adequately supplied with zinc partially recovered from root and shoot growth inhibition by 6 weeks and zinc uptake was recovering by 8 weeks. Plants that were seriously zinc deficient did not recover. In this experiment, potential grain yield was only reduced by chlorsulfuron when zinc supplies were inadequate. It is suggested that the recovery of plants from zinc deficiency may be the result of two processes; hydrolysis of chlorsulfuron with time removing constraints to root growth and functioning, and the release of root exudates from zinc deficient plants effective at mobilizing zinc from soil. In the field, chlorsulfuron is only likely to induce zinc deficiency and reduce yield in wheat where supplies of this trace element are marginal for growth.

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Zinc uptake by blood cells of rats in zinc deficiency and inflammation

Biological Trace Element Research ◽

10.1007/bf02783726 ◽

1992 ◽

Vol 35 (2) ◽

pp. 137-152 ◽

Cited By ~ 12

Author(s):

Ton H. J. Naber ◽

Cornelis J. A. van den Hamer ◽

Wim J. M. van den Broek ◽

Jan H. M. van Tongeren

Keyword(s):

Zinc Deficiency ◽

Blood Cells ◽

Zinc Uptake

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The effect of 2-(4-2′,4′-dichlorophenoxy-phenoxy)-methyl propanoate on the uptake and utilization of zinc by wheat

Australian Journal of Agricultural Research ◽

10.1071/ar9890981 ◽

1989 ◽

Vol 40 (5) ◽

pp. 981 ◽

Cited By ~ 5

Author(s):

AD Robson ◽

K Snowball

Keyword(s):

Plant Growth ◽

Zinc Deficiency ◽

Zinc Uptake ◽

Root Weight ◽

Zinc Status ◽

Herbicide Application ◽

Field Crops ◽

Zinc Concentrations ◽

Plant Effects ◽

Methyl Propanoate

The effect of the herbicide diclofop-methyl on the uptake and utilization of zinc by wheat was examined in a series of glasshouse experiments. Application of diclofop-methyl to soil induced symptoms of zinc deficiency and decreased zinc concentrations within shoots. Effects of the herbicide application in decreasing plant growth were more marked at marginal levels of zinc than at adequate levels. The application of diclofop-methyl to the soil induced zinc deficiency by decreasing the uptake of zinc from soil rather than by effects on the utilization of zinc within the plant. The application of diclofop-methyl to leaves with no contamination of the soil did not affect the zinc status of the plant. Effects of diclofopmethyl in decreasing zinc uptake did not appear to be due to effects of the herbicide on root weight or root length.In the field, diclofop-methyl is sprayed on crops with low leaf areas, hence a high proportion of the herbicide will reach the soil. It is thus likely that in field crops application of diclofop-methyl will induce zinc deficiency where the supply of zinc for the crop is marginal.

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Agronomic Biofortification of Maize with Zinc Fertilizers Increases Zinc Uptake from Maize Flour by Human Intestinal Caco-2 Cells

Current Developments in Nutrition ◽

10.1093/cdn/nzaa067_080 ◽

2020 ◽

Vol 4 (Supplement_2) ◽

pp. 1853-1853

Author(s):

Cecilia Watts ◽

Mohamad Aslam ◽

Nilupa Gunaratna ◽

Anuraj Shankar ◽

Hugo De Groote ◽

...

Keyword(s):

Zinc Deficiency ◽

Agricultural Research ◽

Foliar Application ◽

Zinc Content ◽

Fold Increase ◽

Seed Priming ◽

Zinc Uptake ◽

Research Centre ◽

Maize Flour ◽

Agronomic Biofortification

Abstract Objectives Zinc deficiency is prevalent in many low- and middle-income countries. Maize is an important staple food source in many of these regions, however, it contains low levels of nutritionally important minerals including zinc. The purpose of this study was to test the hypothesis that application of zinc-containing fertilisers would increase both the zinc content of, and amount of zinc available for absorption from, maize flour. Methods Maize was grown in pots in zinc-deficient soils (<1.22 mg/L) at the Bako Agricultural Research Centre, Ethiopia. Zinc (ZnSO4) was applied via several routes: directly to the soil; in the side dressing; as a foliar application; or through seed priming. Zinc content of maize flour samples was measured by ICP-OES. Flour samples were then subjected to simulated in vitro gastrointestinal digestion and zinc uptake by human intestinal Caco-2 cells was measured using ICP-MS. Results Addition of zinc to the soil alone did not increase zinc uptake by Caco-2 cells compared with untreated control maize. In contrast, addition of ZnSO4, to the side dressing (3.6-fold increase), through foliar application (2.9-fold increase), or through seed priming (4.2-fold increase) significantly increased zinc uptake compared with untreated controls and the soil zinc treatment groups (1-way ANOVA and Tukey's test; P < 0.05). Zinc uptake by Caco-2 cells was correlated significantly with the zinc content of the flour (r2 = 0.24; P < 0.02). Conclusions Together, these data demonstrate that several fertilisation methods can be used to increase zinc content of maize flour. This additional zinc is, at least partly, available for absorption by human intestinal epithelial cells. Agronomic biofortification is therefore a promising strategy to combat zinc deficiency in vulnerable populations. Funding Sources This work was funded in part by a grant from the Bill & Melinda Gates Foundation.

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Cobalt can fully recover the phenotypes related to zinc deficiency in Salmonella Typhimurium

Metallomics ◽

10.1039/d0mt00145g ◽

2020 ◽

Author(s):

Serena Ammendola ◽

Domenico Ciavardelli ◽

Ada Consalvo ◽

Andrea Battistoni

Keyword(s):

Superoxide Dismutase ◽

Salmonella Typhimurium ◽

Zinc Deficiency ◽

Zinc Uptake ◽

Uptake System ◽

Cobalt Ions ◽

High Affinity

Cobalt ions can replace zinc in vivo and repress the Zur-dependent high affinity zinc uptake system, bind to a periplasmic Cu,Zn superoxide dismutase, modulate flagella expression and associate with ribosomes.

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A Defect in Zinc Uptake by Jejunal Biopsies in Acrodermatitis Enteropathica

Clinical Science ◽

10.1042/cs0560505 ◽

1979 ◽

Vol 56 (5) ◽

pp. 505-507 ◽

Cited By ~ 63

Author(s):

D. J. Atherton ◽

D. P. R. Muller ◽

P. J. Aggett ◽

J. T. Harries

Keyword(s):

Zinc Deficiency ◽

Zinc Uptake ◽

Acrodermatitis Enteropathica

1. In a system in vitro, 65Zn accumulation by jejunal mucosal biopsies from patients with acrodermatitis enteropathica was found to be markedly reduced compared with controls. 2. We suggest that defective uptake of zinc by enterocytes is the primary abnormality responsible for the zinc deficiency underlying this disorder.

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Response of Schizosaccharomyces pombe to Zinc Deficiency

Eukaryotic Cell ◽

10.1128/ec.00408-07 ◽

2008 ◽

Vol 7 (3) ◽

pp. 454-464 ◽

Cited By ~ 29

Author(s):

Samantha J. Dainty ◽

Ciara A. Kennedy ◽

Stephen Watt ◽

Jürg Bähler ◽

Simon K. Whitehall

Keyword(s):

Schizosaccharomyces Pombe ◽

Zinc Deficiency ◽

Metal Ion ◽

Cellular Response ◽

Transcript Abundance ◽

Zinc Uptake ◽

Mrna Levels ◽

Gene Encoding ◽

Intracellular Zinc ◽

Responsive Gene

ABSTRACT A component of the cellular response to zinc deficiency operates via control of transcript abundance. Therefore, microarray analysis was employed to identify Schizosaccharomyces pombe genes whose mRNA levels are regulated by intracellular zinc status. A set of 57 genes whose mRNA levels were substantially reduced in response to zinc deficiency was identified, while the mRNA levels of 63 genes were increased by this condition. In order to investigate the mechanisms that control these responses, a genetic screen was employed to identify mutants with defective zinc-responsive gene expression. Two strains (II-1 and V7) that were identified by this screen harbor mutations that are linked to zrt1 +, which encodes a putative Zrt/IRT-like protein (ZIP) zinc uptake transporter. Importantly, zrt1 + mRNA levels are increased in response to zinc deprivation, and cells lacking functional Zrt1 are highly impaired in their ability to proliferate at limiting zinc concentrations. Furthermore, zrt1 null cells were found to have severely reduced zinc contents, indicating that Zrt1 functions as a key regulator of intracellular zinc levels in fission yeast. The deletion of fet4 +, another zinc-responsive gene encoding a putative metal ion transporter, exacerbated the phenotypes associated with the loss of Zrt1, suggesting that Fet4 also plays a role in zinc uptake under limiting conditions.

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