Mitigation of chromium toxicity in Arabidopsis thaliana by sulfur supplementation

Ding, Guotao; Jin, Zengjun; Han, Yonghong; Sun, Peng; Li, Guiying; Li, Weihao

doi:10.1016/j.ecoenv.2019.109379

Cited by 46 publications

(27 citation statements)

References 36 publications

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“…Cr exposure affects the shoot length and biomass of the plant [37]. With the increase in Cr(VI) concentration, the shoot length of Helianthus annus L. was found to be decreased [38].…”

Section: Effects On Shoot Growthmentioning

confidence: 99%

Chromium Stress in Plants: Toxicity, Tolerance and Phytoremediation

et al. 2021

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Extensive industrial activities resulted in an increase in chromium (Cr) contamination in the environment. The toxicity of Cr severely affects plant growth and development. Cr is also recognized as a human carcinogen that enters the human body via inhalation or by consuming Cr-contaminated food products. Taking consideration of Cr enrichment in the environment and its toxic effects, US Environmental Protection Agency and Agency for Toxic Substances and Disease Registry listed Cr as a priority pollutant. In nature, Cr exists in various valence states, including Cr(III) and Cr(VI). Cr(VI) is the most toxic and persistent form in soil. Plants uptake Cr through various transporters such as phosphate and sulfate transporters. Cr exerts its effect by generating reactive oxygen species (ROS) and hampering various metabolic and physiological pathways. Studies on genetic and transcriptional regulation of plants have shown the various detoxification genes get up-regulated and confer tolerance in plants under Cr stress. In recent years, the ability of the plant to withstand Cr toxicity by accumulating Cr inside the plant has been recognized as one of the promising bioremediation methods for the Cr contaminated region. This review summarized the Cr occurrence and toxicity in plants, role of detoxification genes in Cr stress response, and various plants utilized for phytoremediation in Cr-contaminated regions.

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“…Cr exposure affects the shoot length and biomass of the plant [37]. With the increase in Cr(VI) concentration, the shoot length of Helianthus annus L. was found to be decreased [38].…”

Section: Effects On Shoot Growthmentioning

confidence: 99%

Chromium Stress in Plants: Toxicity, Tolerance and Phytoremediation

et al. 2021

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“…However, an interesting phenomenon was found which suggested that Cr exhibited a strong health risk for humans in the two exposure pathways. This is mainly related to the strong biotoxicity and high activity of Cr [43,44]. In particular, when Cr is present in the form of hexavalent chromium, it is not easily adsorbed by soil and is quickly released into the environment [44].…”

Section: Resultsmentioning

confidence: 99%

Simultaneous Health Risk Assessment of Potentially Toxic Elements in Soils and Sediments of the Guishui River Basin, Beijing

Wang

Gao

Yin

et al. 2019

IJERPH

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Simultaneous ecological and health risk assessments of potentially toxic elements in soils and sediments can provide substantial information on their environmental influence at the river-basin scale. Herein, soil and sediment samples were collected from the Guishui River basin to evaluate the pollution situation and the ecological and health risk of potentially toxic elements. Various indexes were utilized for quantitatively assessing their health risks. Pollution assessment by geo-accumulation index showed that Cd had “uncontaminated to moderately polluted” status in the soils and sediments. Potential ecological risk index showed that the Guishui River basin was at low risk in general, but Cd was classified as “moderate or considerable ecological risk” both in the soils and sediments. Health risk assessment calculated human exposure from soils and indicated that both non-carcinogenic and carcinogenic risks of the selected potentially toxic elements were lower than the acceptable levels. Health risks posed by potentially toxic elements bio-accumulated in fish, stemming from sediment resuspension, were also assessed. Non-carcinogenic hazard index indicated no adverse health effects on humans via exposure to sediments; however, in general, Cr contributed largely to health risks among the selected potentially toxic elements. Therefore, special attention needs to be paid to the Guishui River basin in the future.

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“…Cr(VI) usually occurs as chromate (CrO 4− ) and dichromate (Cr 2 O 4 2− ) anionic forms and can easily cross cell membranes with active transport mechanisms [3,4] through nonspecific anion channels [5]. Interactions between chromium and sulfur in biological systems are numerous and somewhat contrasting; while S enhances cellular response to Cr, this can induce a sort of S-starvation, both through a competition for sulfate transporters and through a depletion of sulfur reduced compounds like Cys and GSH [6][7][8][9]. These thiol containing molecules are partly involved in metal chelation and partly oxidized to reduce ROS damages.…”

Section: Introductionmentioning

confidence: 99%

Role of Sulfate Transporters in Chromium Tolerance in Scenedesmus acutus M. (Sphaeropleales)

Ferrari

Cozza

Marieschi

et al. 2022

Plants

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Sulfur (S) is essential for the synthesis of important defense compounds and in the scavenging potential of oxidative stress, conferring increased capacity to cope with biotic and abiotic stresses. Chromate can induce a sort of S-starvation by competing for uptake with SO42− and causing a depletion of cellular reduced compounds, thus emphasizing the role of S-transporters in heavy-metal tolerance. In this work we analyzed the sulfate transporter system in the freshwater green algae Scenedesmus acutus, that proved to possess both H+/SO42− (SULTRs) and Na+/SO42− (SLTs) plasma membrane sulfate transporters and a chloroplast-envelope localized ABC-type holocomplex. We discuss the sulfate uptake system of S. acutus in comparison with other taxa, enlightening differences among the clade Sphaeropleales and Volvocales/Chlamydomonadales. To define the role of S transporters in chromium tolerance, we analyzed the expression of SULTRs and SULPs components of the chloroplast ABC transporter in two strains of S. acutus with different Cr(VI) sensitivity. Their differential expression in response to Cr(VI) exposure and S availability seems directly linked to Cr(VI) tolerance, confirming the role of sulfate uptake/assimilation pathways in the metal stress response. The SULTRs up-regulation, observed in both strains after S-starvation, may directly contribute to enhancing Cr-tolerance by limiting Cr(VI) uptake and increasing sulfur availability for the synthesis of sulfur-containing defense molecules.

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Mitigation of chromium toxicity in Arabidopsis thaliana by sulfur supplementation

Cited by 46 publications

References 36 publications

Chromium Stress in Plants: Toxicity, Tolerance and Phytoremediation

Chromium Stress in Plants: Toxicity, Tolerance and Phytoremediation

Simultaneous Health Risk Assessment of Potentially Toxic Elements in Soils and Sediments of the Guishui River Basin, Beijing

Role of Sulfate Transporters in Chromium Tolerance in Scenedesmus acutus M. (Sphaeropleales)

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