Arsenic contamination, speciation, toxicity and defense strategies in plants

Mishra, Rohit Kumar; Tiwari, Sanjesh; Patel, Anuradha; Prasad, Sheo Mohan

doi:10.1007/s40415-020-00694-5

Cited by 33 publications

(10 citation statements)

References 88 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Environmental pollution with As is a global concern due to its harmful physiological effects on living systems. The presence of As, especially in soil and groundwater [59] directly exposes plants to significant risk [60,61]. It accumulates in different parts of edible plants growing in contaminated soils and water, which poses a grave threat when consumed by higher-order consumers in the food chain [62].…”

Section: Classification Of Arsenic From the Biological And Toxicologi...mentioning

confidence: 99%

See 1 more Smart Citation

Negative Impacts of Arsenic on Plants and Mitigation Strategies

Sinha

Datta

Mishra

et al. 2023

Plants

View full text Add to dashboard Cite

Arsenic (As) is a metalloid prevalent mainly in soil and water. The presence of As above permissible levels becomes toxic and detrimental to living organisms, therefore, making it a significant global concern. Humans can absorb As through drinking polluted water and consuming As-contaminated food material grown in soil having As problems. Since human beings are mobile organisms, they can use clean uncontaminated water and food found through various channels or switch from an As-contaminated area to a clean area; but plants are sessile and obtain As along with essential minerals and water through roots that make them more susceptible to arsenic poisoning and consequent stress. Arsenic and phosphorus have many similarities in terms of their physical and chemical characteristics, and they commonly compete to cause physiological anomalies in biological systems that contribute to further stress. Initial indicators of arsenic’s propensity to induce toxicity in plants are a decrease in yield and a loss in plant biomass. This is accompanied by considerable physiological alterations; including instant oxidative surge; followed by essential biomolecule oxidation. These variables ultimately result in cell permeability and an electrolyte imbalance. In addition, arsenic disturbs the nucleic acids, the transcription process, and the essential enzymes engaged with the plant system’s primary metabolic pathways. To lessen As absorption by plants, a variety of mitigation strategies have been proposed which include agronomic practices, plant breeding, genetic manipulation, computer-aided modeling, biochemical techniques, and the altering of human approaches regarding consumption and pollution, and in these ways, increased awareness may be generated. These mitigation strategies will further help in ensuring good health, food security, and environmental sustainability. This article summarises the nature of the impact of arsenic on plants, the physio-biochemical mechanisms evolved to cope with As stress, and the mitigation measures that can be employed to eliminate the negative effects of As.

show abstract

Section: Classification Of Arsenic From the Biological And Toxicologi...mentioning

confidence: 99%

“…Arsenic(III), As(V), MMAA(V), and DMAA(V) are the most commonly present As species in terrestrial ecosystems including plants [60,82]. The molecular structures of some key As species (both inorganic and organic) are indicated in Figure 1.…”

Section: Inorganic and Organic Forms Of Arsenicmentioning

confidence: 99%

Negative Impacts of Arsenic on Plants and Mitigation Strategies

Sinha

Datta

Mishra

et al. 2023

Plants

View full text Add to dashboard Cite

show abstract

“…(Sharma et al, 2021). Inorganic Hg acts as an inducer and amplifies the activity of the functional genes (Mishra et al, 2021). Following external Hg depletion, the secondary regulator merD switches et al, 2023).…”

Section: Intrinsic and Engineered Microbial Bioremediationmentioning

confidence: 99%

“…The Hg(II) ions are later transformed to Hg(0) by mercuric ion reductase, encoded by merA, utilising the NADPH‐based mechanism described above (Sharma et al, 2021). Inorganic Hg acts as an inducer and amplifies the activity of the functional genes (Mishra et al, 2021). Following external Hg depletion, the secondary regulator merD switches off in many Proteobacteria, which inhibits the mer operon (A. D. Singh et al, 2023).…”

Section: Microbial Bioremediationmentioning

confidence: 99%

Bioremediation of mercury contaminated soil and water: A review

Kumar,

Chawla

et al. 2023

Land Degrad Dev

View full text Add to dashboard Cite

Mercury (Hg) pollution of soil and water environments is a major global threat to human health, agri‐food systems and ecosystems and industrial activities mainly coal combustion augmented their content in different environmental media. Bioremediation is a nature‐based solution involving microbial‐ and plant‐based (phytoremediation) technologies that clean‐up Hg contaminated sites. Here, we review Hg‐resistant bacteria and how latest insights in our understanding of the cellular and biochemical mechanisms of the mer operon genes responsible for Hg resistance and transformation have facilitated developments in microbial Hg‐bioremediation. We also review the phytoremediation mechanisms, including those of bacterial‐ and fungi‐assisted phytoremediation processes, which have shown promising results in reducing Hg2+ to Hg0. This review provides a detailed knowledge of novel Hg bioremediation mechanisms and methods. Consequently, microbial‐ and phyto‐based bioremediation technologies have a critical role in the reclamation of Hg‐contaminated environments and the protection of human health and ecosystems.

show abstract

“…As an antioxidant, glutathione lowers the production of free radicals brought on by arsenic stress, neutralizing their negative effects, and oxidizing itself to GSSG [ 101 ]. Pentavalent As is also converted by glutathione into trivalent As [ 102 , 103 ]. Further binding of glutathione results in the formation of the As-(GSH) 3 complex, which is actively transported to vacuoles by the ABC transporters [ 104 ].…”

Section: Arsenic Detoxification Mechanism Using As Tolerant Fungi And...mentioning

confidence: 99%

Consequences of Arsenic Contamination on Plants and Mycoremediation-Mediated Arsenic Stress Tolerance for Sustainable Agriculture

Gupta

Dubey

Kumar

et al. 2022

Plants

View full text Add to dashboard Cite

Arsenic contamination in water and soil is becoming a severe problem. It is toxic to the environment and human health. It is usually found in small quantities in rock, soil, air, and water which increase due to natural and anthropogenic activities. Arsenic exposure leads to several diseases such as vascular disease, including stroke, ischemic heart disease, and peripheral vascular disease, and also increases the risk of liver, lungs, kidneys, and bladder tumors. Arsenic leads to oxidative stress that causes an imbalance in the redox system. Mycoremediation approaches can potentially reduce the As level near the contaminated sites and are procuring popularity as being eco-friendly and cost-effective. Many fungi have specific metal-binding metallothionein proteins, which are used for immobilizing the As concentration from the soil, thereby removing the accumulated As in crops. Some fungi also have other mechanisms to reduce the As contamination, such as biosynthesis of glutathione, cell surface precipitation, bioaugmentation, biostimulation, biosorption, bioaccumulation, biovolatilization, methylation, and chelation of As. Arsenic-resistant fungi and recombinant yeast have a significant potential for better elimination of As from contaminated areas. This review discusses the relationship between As exposure, oxidative stress, and signaling pathways. We also explain how to overcome the detrimental effects of As contamination through mycoremediation, unraveling the mechanism of As-induced toxicity.

show abstract

Arsenic contamination, speciation, toxicity and defense strategies in plants

Cited by 33 publications

References 88 publications

Negative Impacts of Arsenic on Plants and Mitigation Strategies

Negative Impacts of Arsenic on Plants and Mitigation Strategies

Bioremediation of mercury contaminated soil and water: A review

Consequences of Arsenic Contamination on Plants and Mycoremediation-Mediated Arsenic Stress Tolerance for Sustainable Agriculture

Contact Info

Product

Resources

About