Insights into the Molecular Mechanism of Arsenic Phytoremediation

Thakur, Sapna; Choudhary, Sonal; Majeed, Aasim; Singh, Amandeep; Bhardwaj, Pradeep

doi:10.1007/s00344-019-10019-w

Cited by 32 publications

(15 citation statements)

References 120 publications

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“…Overall, inorganic As is more lethal and movable than the organic form [ 2 ]. The most abundant As form is As(V) under oxidising conditions, while As(III) predominates under reducing conditions, and these two forms are inter-convertible [ 5 ]. Inorganic As(V) remains mostly in the free form as an anion species, whereas As(III) can be bound to oligopeptide phytochelatins or proteins.…”

Section: Introductionmentioning

confidence: 99%

“…Furthermore, As acts by impairing mitochondrial enzymes, thereby causing a halt in cellular respiration and uncoupling oxidative phosphorylation [ 6 ]. Arsenate does not react directly with the active sites of enzymes [ 6 ], but this form strongly interacts with sulfhydryl groups in proteins, interfering with cellular functions [ 5 , 13 ].…”

Section: Introductionmentioning

confidence: 99%

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Arsenic Toxicity-Induced Physiological and Metabolic Changes in the Shoots of Pteris cretica and Spinacia oleracea

Zemanová

Pavlı́ková

Hnilička

et al. 2021

Plants

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Arsenic is a ubiquitous toxic element that can be accumulated into plant parts. The present study investigated the response of Pteris cretica and Spinacia oleracea to As treatment through the analysis of selected physiological and metabolic parameters. Plants were grown in pots in As(V) spiked soil (20 and 100 mg/kg). Plants’ physiological condition was estimated through the determination of elements, gas-exchange parameters, chlorophyll fluorescence, water potential, photosynthetic pigments, and free amino acid content. The results confirmed differing As accumulation in plants, as well as in shoots and roots, which indicated that P. cretica is an As-hyperaccumulator and that S. oleracea is an As-root excluder. Variations in physiological and metabolic parameters were observed among As treatments. Overall, the results revealed a significant effect of 100 mg/kg As treatment on the analysed parameters. In both plants, this treatment affected growth, N, Mg, S, Mn, and Zn content, as well as net photosynthetic rate, chlorophyll fluorescence, and total free amino acid content. In conclusion, the results reflect the similarity between P. cretica and S. oleracea in some aspects of plants’ response to As treatment, while physiological and metabolic parameter changes related to As treatments indicate the higher sensitivity of S. oleracea.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Arsenic Toxicity-Induced Physiological and Metabolic Changes in the Shoots of Pteris cretica and Spinacia oleracea

Zemanová

Pavlı́ková

Hnilička

et al. 2021

Plants

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show abstract

“…The potential mitigation strategies for reducing the As burden involve As efflux and its sequestration in intracellular compartment [134]. Strategies for developing genetically engineered plants for As phytoremediation encompass increased uptake of As by roots, enhanced translocation of As from root to shoot including xylem loading, arsenate reduction, vacuolar sequestration and enhanced tolerance to As [135,136].…”

Section: Genetic Engineering For Improving Arsenic Phytoremediationmentioning

confidence: 99%

Arsenic Remediation through Sustainable Phytoremediation Approaches

et al. 2021

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Arsenic contamination of the environment is a serious problem threatening the health of millions of people exposed to arsenic (As) via drinking water and crops grown in contaminated areas. The remediation of As-contaminated soil and water bodies needs to be sustainable, low-cost and feasible to apply in the most affected low-to-middle income countries, like India and Bangladesh. Phytoremediation is an aesthetically appreciable and successful approach that can be used for As decontamination with use of the best approach(es) and the most promising plant(s). However, phytoremediation lacks the required speed and sometimes the stress caused by As could diminish plants’ potential for remediation. To tackle these demerits, we need augment plants’ potential with appropriate technological methods including microbial and nanoparticles applications and genetic modification of plants to alleviate the As stress and enhance As accumulation in phytoremediator plants. The present review discusses the As phytoremediation prospects of soil and water bodies and the usefulness of various plant systems in terms of high biomass, high As accumulation, bioenergy potential, and economic utility. The potential and prospects of assisted phytoremediation approaches are also presented.

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“…Diminishing in the tissue respiration and energy supply can also be seen in the plant due to impaired glycolysis and the TCA cycle. This is due to the replacement/ interaction of phosphate and sulfhydryl groups (-SH ) of enzymes /biomolecules with As (V) and As (III) respectively (Thakur et al, 2020). Visible toxic effects observed in plants include inhibition of seed germination, discoloured-stunted roots, necrosis, chlorosis, decreased photosynthetic activity, withered leaves, reduced fruit and grain yield, and in extreme cases, even death.…”

Section: Plantsmentioning

confidence: 99%

“…Thus, phytostabilization aids in reducing off-site contamination (Shrivastava et al, 2015). Plants secrete certain redox enzymes such as arsenate reductase and stabilize the contaminant (arsenic) through sorption, complexation/ metal valence reduction or precipitation it to less toxic forms (Thakur et al, 2020) and stabilize the contaminant (arsenic) through sorption, complexation/ metal valence reduction or precipitation and therefore convert it to less toxic forms. Thus, this method does not lead to the formation of any secondary waste, but it enhances soil fertility.…”

Section: Phytostabilizationmentioning

confidence: 99%

Critical review on arsenic: Its occurrence, contamination and remediation from water and soil

Meghana

Sayantan

2021

JANS

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With the increasing pollution in today’s world, importance is being given to solve a problem and do it in a sustainable, eco-friendly manner. Arsenic is a class-1 carcinogen and also causes many other side effects to humans, plants and animals. The utilization of arsenic as wood preservatives, pesticides, or its historical overuse by some military units for rice killing operations has led to the increase in the toxic effects of arsenic like its carcinogenicity, decreased immune response etc. Although conventional methods like coagulation, lime softening, adsorption, membrane technology are effective, they have their disadvantages like additional waste generation, causing increased pollution and are expensive. The better alternative is phytoremediation. Appropriate plants like Brassica juncea, Hydrilla verticilata, Pteris vittata L., Vallisneria natans, can be chosen based on the method of the remediation like phytoextraction, phytostabilization and phytofiltration or phytovoltalization. This review provides the list of a few plants which can be likely chosen for the purpose of both water and soil remediation. Advancements are occurring in bioremediation studies with the development of transgenic plants like transgenic tobacco, transgenic Arabidopsis thaliana for better phytoremediation. Understanding the mechanism employed by the plant for its uptake/detoxification can aid in the enhancement of the process of remediation with the external supply of phosphorus. Along with this, the proper and safe disposal of plants is crucial for the remediation process. In addition, awareness of this solution to the general public is to be made for its effectiveness.

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Insights into the Molecular Mechanism of Arsenic Phytoremediation

Cited by 32 publications

References 120 publications

Arsenic Toxicity-Induced Physiological and Metabolic Changes in the Shoots of Pteris cretica and Spinacia oleracea

Arsenic Toxicity-Induced Physiological and Metabolic Changes in the Shoots of Pteris cretica and Spinacia oleracea

Arsenic Remediation through Sustainable Phytoremediation Approaches

Critical review on arsenic: Its occurrence, contamination and remediation from water and soil

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