Adaptation Strategies of Plants against Heavy Metal Toxicity: A Short Review

Singh, Madhulika; Kumar, Jitendra; Singh, Shikha; Singh, Vijay Pratap; Prasad, Sheo Mohan; Singh, Mpvvb

doi:10.4172/2167-0501.1000161

Cited by 22 publications

(8 citation statements)

References 74 publications

(97 reference statements)

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“…However, it is important to note that this relationship can be confounded as the effect of changing metal ion reactivity is highly variable (Caporale and Violante, 2016;Hough et al, 2003). Some plants have also demonstrated metal tolerance mechanisms due to various traits such as selective uptake of ions, the decreased permeability of membranes and localisation of metals in certain areas of the plant (Jitendra Kumar et al, 2015;Viehweger, 2014). Typically, the highest concentrations of pollutants are found in plant roots and the lowest in plant seeds (Sharma and Dubey, 2005).…”

Section: Introductionmentioning

confidence: 99%

Assessment of potentially toxic trace element contamination in urban allotment soils and their uptake by onions: A preliminary case study from Sheffield, England

Weber

Mawodza

Sarkar

et al. 2019

Ecotoxicology and Environmental Safety

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Toxic trace element (TTE) contamination in urban soils may pose potential health risks, especially in cities with previous industrial activities. This study aimed to investigate soil contamination in urban allotments in Sheffield, the uptake of TTEs in autumn and spring sown onions (Allium cepa), and their potential risks on human health via consumption of the crops. Paired soil and plant samples were taken in triplicates from four private allotments to assess potentially elevated levels of lead (Pb), zinc (Zn), copper (Cu), arsenic (As), and chromium (Cr). These elements in soils exceeded the ambient background levels for England. Both Pb and As exceeded some UK and EU soil tolerable limits. Concentration factors (CF) were calculated as the ratio of trace element in the plant as compared to that in the soil, and uptake rates were in the order Zn>Cu>Cr>Pb>As. Concentrations were higher for most TTEs in spring sown onions (SSO), and had significantly higher CF (p<0.05) for Pb and Cr than autumn sown onions (ASO), whereas the opposite was true for As. Toxic elements in plants did not exceed FAO/WHO intake limits when considering TTE content per plant and consumption rates. Human health risk assessment calculations using target hazard quotients (THQ) and hazard indexes (HI) indicated that consuming onions alone did not pose an immediate health risk.

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Section: Introductionmentioning

confidence: 99%

Assessment of potentially toxic trace element contamination in urban allotment soils and their uptake by onions: A preliminary case study from Sheffield, England

Weber

Mawodza

Sarkar

et al. 2019

Ecotoxicology and Environmental Safety

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“…Populations may then evolve alternative strategies to overcome the adverse influence of otherwise toxic MTE concentrations, which strategies involve the absorption, immobilization and/or excretion of MTEs. The evolution of MTE-tolerant genotypes is well-known in vascular plants [31,32]. In invertebrates, MTE exposure, although not in the context of urbanization, is associated with genetic and phenotypic variations [33][34][35].…”

Section: Introductionmentioning

confidence: 99%

Endogeic Earthworms Avoid Soil Mimicking Metal Pollution Levels in Urban Parks

CHATELAIN

2023

Sustainability

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In response to long-lasting high levels of metallic trace elements (MTEs) in urban soils, we expect soil invertebrates inhabiting urban environments to have evolved detection and avoidance and/or tolerance mechanisms to MTE pollution. In this study, I used artificial soils with concentrations of lead, zinc, copper, chromium and nickel that reflect pollution levels in the soils of Parisian parks. Using choice experiments, I compared habitat preference (i.e., the occurrence of individuals in the polluted vs. unpolluted soil) and health status (i.e., body mass maintenance, mobility, mortality) between three species of endogeic earthworms—Aporrectodea caliginosa, Aporrectodea icterica and Allolobophora chlorotica—originating either from urban or rural grasslands. This study highlights a clear avoidance of MTE-polluted soils in all three species, as well as MTE-induced health impairments, especially in A. chlorotica. Interestingly, earthworm response to MTE exposure only slightly differed between earthworms of urban and rural origin, suggesting the absence of widespread acclimatization or adaptation mechanisms to MTE pollution in cities. As a consequence, MTE pollution is expected to significantly shape earthworm spatial distribution in both urban and rural environments and, as a consequence, affect ecosystem functioning.

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“…Thus, the identification of plant species with the ability to tolerate (and concentrate in their biomass) the high levels of these heavy metals becomes an important factor in phytoremediation studies (Yu et al, 2013;Singh et al, 2015).…”

Section: Introduction Introduction Introduction Introductionmentioning

confidence: 99%

The cup plant (Silphium perfoliatum L.) – a viable solution for bioremediating soils polluted with heavy metals

Muntean

Kostov

Kržanović

et al. 2020

Not Bot Horti Agrobo

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Heavy metal pollution, manifested by the accumulation, toxicity and persistence in soil, water, air, and living organisms, is a major environmental problem that requires energetic resolution. Mining tailing areas contain metal minerals such as Cu, Zn, Pb, Cr and Cd in high concentrations that pollute the environment and pose threats to human health. Phytoremediation represents a sustainable, long-term, and relatively inexpensive strategy, thus proving to be convenient for stabilizing and improving the environment in former heavy metal-polluted mining sites. This study presents the bioremediation potential of Silphium perfoliatum L. plants, in the vegetative stages of leaf rosette formation, grown on soil polluted with heavy metals from mining dumps in Moldova-Noua, in the Western part of Romania. The bioaccumulation factor (BAF), translocation factor (TF), metal uptake (MU) and removal efficiency (RE) of Cu, Zn, Cr and Pb by S. perfoliatum plants were determined in a potted experiment in controlled environmental conditions. The reference quantities of heavy metals have been determined in the studied soil sample. The experiment followed the dynamics of the translocation and accumulation of heavy metals in the soil, in the various organs of the silphium plants, during the formation of the leaf rosette (13-18 BBCH). The determination of the amount of heavy metals in soil and plants was achieved by the method of digestion with hydrochloric and nitric acid 3/1 (v/v) quantified by atomic absorption spectroscopy (AAS). The obtained experimental results demonstrate that the substrate has a high heavy metal content being at the alert threshold for Zn (260.01 mg kg-1 in substrate compared with alert threshold 300 mg kg-1) and at intervention thresholds for other metals (Cu -234.66 mg kg-1/200 mg kg-1; 299.08 mg kg-1/300 mg kg-1 and Pb-175.18 mg kg-1/100 mg kg-1). The average concentration of the metals determined in dynamics in the dry biomass of plants varied between roots, petioles, and laminas. The root is the main accumulator for Cu and Cr (Cu – 37.32 mg kg-1 -13 BBCH to 43.89 mg kg-1-15 BBCH and 80.71 mg kg-1 – 18 BBCH; Cr – 57.43 mg kg-1 – 13 BBCH to 93.36 mg kg-1 -18 BBCH), and for Zn and Pb the lamina seems to carry the same function. Preliminary results show that Silphium perfoliatum may be a viable alternative in the bioremediation and treatment of heavy metal-contaminated area.

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Adaptation Strategies of Plants against Heavy Metal Toxicity: A Short Review

Cited by 22 publications

References 74 publications

Assessment of potentially toxic trace element contamination in urban allotment soils and their uptake by onions: A preliminary case study from Sheffield, England

Assessment of potentially toxic trace element contamination in urban allotment soils and their uptake by onions: A preliminary case study from Sheffield, England

Endogeic Earthworms Avoid Soil Mimicking Metal Pollution Levels in Urban Parks

The cup plant (Silphium perfoliatum L.) – a viable solution for bioremediating soils polluted with heavy metals

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