Comparative Assessment of Toxic Metals Bioaccumulation and the Mechanisms of Chromium (Cr) Tolerance and Uptake in Calotropis procera

Usman, Kamal; Jabri, Hareb Al; Abu-Dieyeh, Mohammed H.; Alsafran, Mohammed

doi:10.3389/fpls.2020.00883

Cited by 39 publications

(30 citation statements)

References 52 publications

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“…This was observed in many plants, such as Brassica napus 7 . The same results were also confirmed by 8 ; chromium affected growth of leaves of C. procera the main photosynthetic plant organ, increasing chromium concentration leads to a significant reduction in the leaf area and leaf biomass. In general, the reduction in plant height could be fundamentally due to reduced root growth and the transport of nutrients and water to the aerial parts of the plant.…”

Section: Effects Of Trivalent Chromium On Growth Parameters Of Green supporting

confidence: 67%

Translocation and bioconcentration of trivalent chromium in green beans grown on bioponics

Azariz¹,

Fekhaoui²,

Elblidi³

et al. 2020

Mediterr.J.Chem.,

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the increasing number of cases of soil contamination by trace elements have affected crop production, and represents a risk threatening the quality of our food products. Some of these contaminants, such as trivalent chromium Cr (NO3)3, which is similar to micronutrients, can, therefore, be absorbed by plants and whose phytotoxicity has long been considered negligible, and largely underestimated. The purpose of this work was to study the transfer of trivalent chromium from nutrient solution to green beans Phaseolus vulgaris L grown on bioponics; the contamination responses were determined in terms of growth parameters, yield, and dry matter production; at various concentrations (5, 10 and 20 ppm). Chromium trivalent effects have also been studied in tissues plant. Results showed that the absorption of trivalent chromium from the nutrient solution and its translocation to the aerial tissues plants had no adverse effects on growth parameters, and also on beans yield. Results also showed that chromium accumulates in roots rather than in the other tissues, and did not reduce the dry matter production, in terms of translocation and bioconcentration. The transfer factor is low and green beans cannot be defined as a hyperaccumulator of chromium.

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Section: Effects Of Trivalent Chromium On Growth Parameters Of Green supporting

confidence: 67%

Translocation and bioconcentration of trivalent chromium in green beans grown on bioponics

Azariz¹,

Fekhaoui²,

Elblidi³

et al. 2020

Mediterr.J.Chem.,

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“…TC and TN were analyzed using a CHNS/O analyzer (Perkin Elmer, Series II 2400 CHNS/O Elemental Analyzer, Boston, MA, USA). All analyses were performed per equipment or instrument manufacturer’s guides and procedures, and as previously reported [ 10 , 11 ]. Soil ionic contents (cations and anions) were extracted in water and analyzed using Ion Chromatography (Metrohm, MagIC Net 3.3, Herisau, Switzerland).…”

Section: Methodsmentioning

confidence: 99%

“…After digestion, the concentrations of As, Cd, Cu, Cr, Pb, Ni, V, and Zn were determined by directly injecting the samples into an Inductively Coupled Plasma Mass Spectrometer (ICP-MS) (Nex Ion 300D). According to the USEPA classification and previous reports on such metals in Qatari soil [ 12 , 16 ], all analytes were chosen based on public health risks [ 10 , 11 ]. For result validation, quality assurance and control procedures such as Reagent blanks, lab duplicates at every 10th sample, and the National Institute Standard for soil (2709a) were used during analyses.…”

Section: Methodsmentioning

confidence: 99%

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Ecological and Health Risks Assessment of Potentially Toxic Metals and Metalloids Contaminants: A Case Study of Agricultural Soils in Qatar

Alsafran

Usman

Jabri

et al. 2021

Toxics

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In recent years, Qatar has witnessed exponential growth in the human population, urbanization, and increased anthropogenic activities, including agriculture. Potentially toxic environmental contaminants, including metals and metalloids, are commonly found in emerging economies. At high concentrations, elements such as As, Cr, and Ni can be hazardous and may lead to various health problems in humans, including cancer. The current study measured As, Cd, Cr, Cu, Ni, Pb, V, and Zn concentrations in agricultural soils. Pollution levels and potential negative impacts on human and environmental health were determined using the United States Environmental Protection Agency (USEPA) standard methodologies. According to the study’s findings, the studied element concentrations descended in the following order: Zn > Cr > V > Ni > As > Cu > Pb > Cd. Of these, As (27.6 mg/kg), Cr (85.7 mg/kg), Ni (61.9 mg/kg), and Zn (92.3 mg/kg) concentrations were higher than average world background levels. Each of these elements also had an enrichment factor (EF > 1), indicating their anthropogenic origin. The combined pollution load index (PLI > 1) and geo-accumulation index (Igeo) range values of −0.2–2.5 further indicated that the soil was up to 58% polluted. However, the ecological risk factor (Er ≤ 40.6) and potential ecological risk index (PERI = 79.6) suggested low ecological risk. A human health risk evaluation showed that only As, with a hazard index (HI) of 1.3, posed a noncarcinogenic risk to infants. Additionally, As, Cr, and Ni, with total carcinogenic risk (TCR) values of 1.18 × 10−4 and 2.06 × 10−4 for adults and children, respectively, proved carcinogenic to both age groups. The elements’ carcinogenic risk (CR) potential descended in the following order: Ni > As > Cr. Additionally, for both adults and children, oral ingestion is the most likely exposure pathway. Our findings support the need for closer monitoring of potentially toxic metals and metalloids levels in cultivated soils and farm produce in Qatar. Reducing the elements’ bioavailability in soil and developing innovative remediation technologies is needed to limit potential risks to human health. Further studies on As, Cr, and Ni gastrointestinal bioaccessibilities are needed to fully understand the effects after long-term exposure and the cancer-causing potential of these elements over a lifetime.

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“…Evidence of the occurrence of some environmental pollutants, including toxic metals, has been documented. However, only a handful of studies have investigated the phytoremediation of toxic metals, including Pb, using native and invasive plants or plant responses to metal toxicity for optimized remediation 3 – 6 . Our group was among the first to conduct an assessment of the capacity of various local plants to accumulate different toxic metals, including Pb, under field conditions 7 .…”

Section: Introductionmentioning

confidence: 99%

Lead (Pb) bioaccumulation and antioxidative responses in Tetraena qataranse

Usman

Abu-Dieyeh

Zouari

et al. 2020

Sci Rep

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Lead (Pb) is the second most toxic metal on Earth and is toxic to humans and other living things. In plants, Pb commonly inhibits growth when it is at a concentration in the soil of 30 mg/kg or more but several Pb tolerant plants have been reported. However, few studies have focused on plant response to Pb exposure, particularly at concentrations higher than 30 mg/kg. The assessment and evaluation of metal dose-dependent plant responses will assist in future phytoremediation studies. Therefore, this work documents the Pb concentration-dependent antioxidative response in Tetraena qataranse. Young seedlings were irrigated with 0, 25, 50, and 100 mg/L Pb every 48 h for seven weeks under greenhouse conditions. A phytotoxicity test showed that at the lowest treatment concentration, Pb stimulates growth. However, at 100 mg/L (1600 mg/kg Pb in the growth medium at harvest), the metal disrupted healthy growth in T. qataranse, particularly root development. Metal accumulation in the root was higher (up to 2784 mg/kg) than that of the shoot (1141.6 mg/kg). Activity assays of superoxide dismutase (SOD), catalase (CAT), ascorbate peroxidase (APX), guaiacol peroxidase (GPX), and glutathione reductase (GR) showed a progressive increase in enzymatic activities due to Pb treatment. Together, the results of this study suggest that T. qataranse is a Pb hyperaccumulator. Increased antioxidant enzyme activity was essential to maintaining cellular homeostasis and assisted in the arid plant’s tolerance to Pb stress.

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Comparative Assessment of Toxic Metals Bioaccumulation and the Mechanisms of Chromium (Cr) Tolerance and Uptake in Calotropis procera

Cited by 39 publications

References 52 publications

Translocation and bioconcentration of trivalent chromium in green beans grown on bioponics

Translocation and bioconcentration of trivalent chromium in green beans grown on bioponics

Ecological and Health Risks Assessment of Potentially Toxic Metals and Metalloids Contaminants: A Case Study of Agricultural Soils in Qatar

Lead (Pb) bioaccumulation and antioxidative responses in Tetraena qataranse

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