Iron supply prevents Cd uptake in Arabidopsis by inhibiting IRT1 expression and favoring competition between Fe and Cd uptake

He, Xiao; Fan, Shi Kan; Zhu, Jun; Guan, Mei Yan; Liu, Xing Xing; Zhang, Yong Song; Jin, Chong

doi:10.1007/s11104-017-3232-y

Cited by 93 publications

(31 citation statements)

References 51 publications

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“…The control of Pb concentration in maize grain through the content of N-NO 3 can be explained by the enhanced content of the soil-available Fe (Table A1; Figure 4). An enhanced supply of Fe can decrease the net uptake of Pb ions, probably by the same mechanism as proposed by He et al [39] for Cd. hand, the Pbc increased in accordance with the increasing Ca content.…”

supporting

confidence: 61%

“…Maize, as a mocotydenelous plant, takes Fe as Fe 3+ ions from soil solution [40]. It is probable that similar mechanisms to those proposed by He et al [39] for Arabidopsis thaliana L. are also present in maize.…”

mentioning

confidence: 67%

“…This was the most visible when comparing 2015 and 2016. He et al [39] showed that Cd uptake by a model plant, i.e., Arabidopsis thaliana L., was governed by two mechanisms:…”

Section: Heavy Metals Concentration In Maize Grainmentioning

confidence: 99%

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The Multifactorial Effect of Digestate on the Availability of Soil Elements and Grain Yield and Its Mineral Profile—The Case of Maize

Przygocka-Cyna

Grzebisz

2020

Agronomy

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The fertilizer value of digestate (a biogas plant byproduct) depends on its impact on the availability of soil nutrients and on the concentration of minerals, including heavy metals, in the edible crop parts. This hypothesis was verified in field experiments with maize conducted in the years 2014, 2015, and 2016 in Brody, Poland. The two-factorial experiment consisted of the digestate application method and its rate: 0.2, 0.4, and 0.8 t ha −1 . Maize yield in consecutive years fitted the quadratic regression model, reaching a maximum grain yield of 11.5, 10.8, and 9.2 t ha −1 for an optimum digestate rate of 0.56, 0.66, and 0.62 t ha −1 , respectively. The supply of N-NO 3 to maize, concomitant with a shortage of magnesium and iron, was the key factor limiting the grain yield. Cadmium concentration in maize grain exceeded its threshold content in plants fertilized with digestate. An excessive concentration of lead in grain was recorded in the dry season 2015. Cadmium concentration in grain was controlled by the availability of soil Fe and Pb by a shortage of N-NO 3 , zinc, and copper. The negative relationship of Pb with K, Na, Zn, and Fe contents in grain suggests their usefulness as agents to reduce the accumulation of heavy metals.

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supporting

confidence: 61%

mentioning

confidence: 67%

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The Multifactorial Effect of Digestate on the Availability of Soil Elements and Grain Yield and Its Mineral Profile—The Case of Maize

Przygocka-Cyna

Grzebisz

2020

Agronomy

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“…The gene ontology analysis revealed that the DEGs in Cluster 1 were significantly enriched for nine terms in the biological process category, and the three biggest terms were related to the processes of phosphatidylinositol biosynthetic process, cellular response to Fe ion starvation, and phosphatidylinositol metabolic process (Figure b; Table S4). As Fe is a well‐known nutrient that interacts with Cd and as the negative effects of the supply of Fe on the uptake of Cd by roots has been reported (He et al, ), we focused on whether the DNA methylation‐conferred Cd tolerance is associated with the process of cellular response to Fe starvation.…”

Section: Resultsmentioning

confidence: 99%

Inhibition of DNA demethylation enhances plant tolerance to cadmium toxicity by improving iron nutrition

Fan

Zhang

et al. 2019

Plant Cell & Environment

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Although the alteration of DNA methylation due to abiotic stresses, such as exposure to the toxic metal cadmium (Cd), has been often observed in plants, little is known about whether such epigenetic changes are linked to the ability of plants to adapt to stress. Herein, we report a close linkage between DNA methylation and the adaptational responses in Arabidopsis plants under Cd stress. Exposure to Cd significantly inhibited the expression of three DNA demethylase genes ROS1/DML2/DML3 (RDD) and elevated DNA methylation at the genome‐wide level in Col‐0 roots. Furthermore, the profile of DNA methylation in Cd‐exposed Col‐0 roots was similar to that in the roots of rdd triple mutants, which lack RDD, indicating that Cd‐induced DNA methylation is associated with the inhibition of RDD. Interestingly, the elevation in DNA methylation in rdd conferred a higher tolerance against Cd stress and improved cellular Fe nutrition in the root tissues. In addition, lowering the Fe supply abolished improved Cd tolerance due to the lack of RDD in rdd. Together, these data suggest that the inhibition of RDD‐mediated DNA demethylation in the roots by Cd would in turn enhance plant tolerance to Cd stress by improving Fe nutrition through a feedback mechanism.

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“…As divalent transporters, these proteins are responsible mostly for the uptake of Fe; however, their involvement in the trafficking of non-essential metals, such as Cd, was confirmed [24][25][26]. On the other hand, insufficient Fe levels promote Cd influx and accumulation in plants, while Fe supply initiates IRT1-mediated Cd uptake [27,28]. Based on the soil substrate analysis, for concentrations up to 1 mM, the amount of bioavailable Cd was very low.…”

Section: Discussionmentioning

confidence: 99%

Expression of Genes Involved in Heavy Metal Trafficking in Plants Exposed to Salinity Stress and Elevated Cd Concentrations

Nosek

Kaczmarczyk

Jędrzejczyk

et al. 2020

Plants

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Many areas intended for crop production suffer from the concomitant occurrence of heavy metal pollution and elevated salinity; therefore, halophytes seem to represent a promising perspective for the bioremediation of contaminated soils. In this study, the influence of Cd treatment (0.01-10.0 mM) and salinity stress (0.4 M NaCl) on the expression of genes involved in heavy metal uptake (irt2-iron-regulated protein 2, zip4-zinc-induced protein 4), vacuolar sequestration (abcc2-ATP-binding cassette 2, cax4-cation exchanger 2 pcs1-phytochelatin synthase 1) and translocation into aerial organs (hma4-heavy metal ATPase 4) were analyzed in a soil-grown semi-halophyte Mesembryanthemum crystallinum. The upregulation of irt2 expression induced by salinity was additionally enhanced by Cd treatment. Such changes were not observed for zip4. Stressor-induced alterations in abcc2, cax4, hma4 and pcs1 expression were most pronounced in the root tissue, and the expression of cax4, hma4 and pcs1 was upregulated in response to salinity and Cd. However, the cumulative effect of both stressors, similar to the one described for irt2, was observed only in the case of pcs1. The importance of salt stress in the irt2 expression regulation mechanism is proposed. To the best of our knowledge, this study is the first to report the combined effect of salinity and heavy metal stress on genes involved in heavy metal trafficking.Plants 2020, 9, 475 2 of 15 by the occurrence of three symptoms: first, increased osmotic pressure, which results in water deficit conditions; second, accumulation of toxic ions in plant organs [4]; and third, nutritional imbalance, which influences the growth and development of challenged plants [5]. These symptoms are primarily responsible for adverse alterations in morphological, physiological and biochemical processes that disrupt the agricultural production and ecological balance of the area [3].Many areas, including arable lands, suffer from concomitant contamination with heavy metals (HMs) and salts. Recently, the accumulation of HMs in the environment has increased as a consequence of intensified human activities, such as mining, smelting and agricultural practices, including the long-term application of fertilizers, fungicides or pesticides [6]. Since HMs are non-degradable, they may persist in a contaminated substrate for decades [7]. The threat posed by heavy metals to humans has an origin in plants, which are the first link in the food chain. Plants can take up HMs from various sources, such as air, water or soil; the latter process predominates and is dependent on many factors, such as temperature, soil pH, aeration and, clearly, on the particular species involved in the accumulation process.Cadmium is one of the HMs that is particularly widely spread in the environment and has gained prominence as an important issue not only in urbanized lands, but also in less explored, rural, agricultural or wildlife areas. Cd toxicity results from altered uptake and transport of nutrient elements (Ca, Mg, P), disruption ...

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Iron supply prevents Cd uptake in Arabidopsis by inhibiting IRT1 expression and favoring competition between Fe and Cd uptake

Cited by 93 publications

References 51 publications

The Multifactorial Effect of Digestate on the Availability of Soil Elements and Grain Yield and Its Mineral Profile—The Case of Maize

The Multifactorial Effect of Digestate on the Availability of Soil Elements and Grain Yield and Its Mineral Profile—The Case of Maize

Inhibition of DNA demethylation enhances plant tolerance to cadmium toxicity by improving iron nutrition

Expression of Genes Involved in Heavy Metal Trafficking in Plants Exposed to Salinity Stress and Elevated Cd Concentrations

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