Foliar application of selenium and zinc to alleviate wheat (Triticum aestivum L.) cadmium toxicity and uptake from cadmium-contaminated soil

Cadmium is a toxic heavy metal that may be detected in soils and plants. Wheat, as a food consumed by 60% of the world’s population, may uptake a high quantity of Cd through its roots and translocate Cd to the shoots and grains thus posing risks to human health. Therefore, we tried to explore the journey of Cd in wheat via a review of several papers. Cadmium may reach the root cells by some transporters (such as zinc-regulated transporter/iron-regulated transporter-like protein, low-affinity calcium transporters, and natural resistance-associated macrophages), and some cation channels or Cd chelates via yellow stripe 1-like proteins. In addition, some of the effective factors regarding Cd uptake into wheat, such as pH, organic matter, cation exchange capacity (CEC), Fe and Mn oxide content, and soil texture (clay content), were investigated in this paper. Increasing Fe and Mn oxide content and clay minerals may decrease the Cd uptake by plants, whereas reducing pH and CEC may increase it. In addition, the feasibility of methods to diminish Cd accumulation in wheat was studied. Amongst agronomic approaches for decreasing the uptake of Cd by wheat, using organic amendments is most effective. Using biochar might reduce the Cd accumulation in wheat grains by up to 97.8%.

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“…Foliar application [100] 10%-31% (in root) 27%-52% (in shoot) 33%-70% (in grains) 2.7-2.0 (in root) 1.6-0.9 (in shoot) 0.5-0.2 (in grain)…”

Section: Using Zincmentioning

confidence: 99%

Cadmium Uptake by Wheat (Triticum aestivum L.): An Overview

Abedi

Mojiri

2020

Plants

133

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“…Cd in soil is easily taken up by plant roots and causes severe phytotoxicity to plants ( Zare et al., 2018 ). Excessive Cd restricts nutrient uptake ( Yamaguchi et al., 2016 ; Wang et al., 2017 ; Cengiz et al., 2019 ; Wu et al., 2019 ), decreases photosynthetic efficiency ( Pereira de Araújo et al., 2017 ), delays seed germination ( Zhang et al., 2014 ), and impairs plant growth and development ( Bruno et al., 2017 ; Sofo et al., 2017 ), resulting in serious production reductions ( Abbas et al., 2018 ; Guo et al., 2018 ; Chen et al., 2019 ). The current study shows that some orchard soils and even fruits have been contaminated by Cd, which threatens the growth of fruit trees and the edible safety of fruits ( Cheng et al., 2015 ).…”

Section: Introductionmentioning

confidence: 99%

MhNRAMP1 From Malus hupehensis Exacerbates Cell Death by Accelerating Cd Uptake in Tobacco and Apple Calli

et al. 2020

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Excessive cadmium (Cd) damages plants by causing cell death. The present study discusses the function of natural resistance-associated macrophage protein (NRAMP) on cell death caused by Cd in Malus hupehensis. MhNRAMP1 was isolated from M. hupehensis roots, and its protein was located in the cell membrane as a transmembrane protein characterized by hydrophobicity. MhNRAMP1 expression in the roots was induced by Cd stress and calcium (Ca) deficiency. MhNRAMP1 overexpression increased Cd concentration in yeasts and enhanced their sensitivity to Cd. Phenotypic comparisons of plants under Cd stress revealed that the growth of transgenic tobacco and apple calli overexpressing MhNRAMP1 was worse than that of the wild type (WT). The Cd 2+ influx of transgenic tobacco roots and apple calli was higher, and the recovery time of the Cd 2+ influx to a stable state in transgenic apple calli was longer than that of the WT. Cd accumulation and the percentage of apoptotic cells in transgenic lines were higher. Correspondingly, the caspase-1-like and vacuolar processing enzyme (VPE) activities and MdVPEg expression were higher in transgenic apple calli, but the expression levels of genes that inhibit cell death were lower than those in the WT under Cd stress. Moreover, the Cd translocation from the roots to leaves was increased after MhNRAMP1 overexpression, but the Cd translocation from the leaves to seeds was not affected. These results suggest that MhNRMAP1 exacerbated Cd-induced cell death, which was accomplished by mediating Cd 2+ uptake and accumulation, as well as stimulating VPE.

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“…Selenium may also affect metal uptake through the modification of root morphology by the action of phytohormones [12], an increase in the proportion of less mobile metal complexes, and better metal binding to the root cell wall as a result of elevated amounts of pectin and hemicellulose, all of which lead to a limitation of metal transport across the plasma membrane [13]. Therefore, in the presence of Se, restricted Cd accumulation was observed in fruits [14] and seeds [15,16]. Application of Se under Cd stress caused an increase in catalase (CAT), superoxide dismutase (SOD), ascorbate peroxidase (APX), and glutathione reductase (GR) activities, inducing more efficient scavenging of reactive oxygen species (ROS).…”

Section: Introductionmentioning

confidence: 99%

Difference between Selenite and Selenate in the Regulation of Growth and Physiological Parameters of Nickel-Exposed Lettuce

Hawrylak-Nowak

Matraszek-Gawron

2020

Biology

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Nickel is an essential plant micronutrient; however, even at low concentrations, it may be phytotoxic. Selenium is a beneficial element with an alleviating effect that has been confirmed in the case of many abiotic stresses, including metal toxicity. The aim of this study is to assess the effect of two forms of Se (Se(IV) or Se(VI)) on the phytotoxicity, accumulation, and translocation of Ni in lettuce. Nickel causes a reduction in lettuce growth and vitality of roots, probably through increased lipid peroxidation. The application of Se(IV) to a Ni-contaminated medium resulted in a further reduction of growth, especially in the presence of 6 µM Se(IV). The growth-promoting effect of Se was found only in the 2 µM Se(VI)/10 µM Ni treatment. The application of 6 µM Se, regardless of the Se form, to the Ni-containing substrate caused an increase in shoot Ni concentration. In turn, a decrease in root Ni content was found for all Se treatments. The strong aggravation of Ni phytotoxicity in the presence of 6 µM Se(IV) was most likely related to the accumulation of high Se concentration in the roots, and the combination of high root Ni accumulation caused irreversible dysregulation of cell metabolism.

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Foliar application of selenium and zinc to alleviate wheat (Triticum aestivum L.) cadmium toxicity and uptake from cadmium-contaminated soil

Cited by 120 publications

References 69 publications

Cadmium Uptake by Wheat (Triticum aestivum L.): An Overview

Cadmium Uptake by Wheat (Triticum aestivum L.): An Overview

MhNRAMP1 From Malus hupehensis Exacerbates Cell Death by Accelerating Cd Uptake in Tobacco and Apple Calli

Difference between Selenite and Selenate in the Regulation of Growth and Physiological Parameters of Nickel-Exposed Lettuce

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