Effective procedures for the determination of As, Cd, Cu, Fe, Hg, Mg, Mn, Ni, Pb, Se, Th, Zn, U and rare earth elements in plants and foodstuffs

Paniz, Fernanda Pollo; Pedron, Tatiana; Freire, Bruna Moreira; Torres, Daiane Placido; Silva, Fábio Ferreira; Batista, Bruno Lemos

doi:10.1039/c8ay01295d

Cited by 61 publications

(20 citation statements)

References 41 publications

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“…Subsequently, 8 ml of a solution containing 4 ml of H 2 O 2 (30% v/v) and 4 ml of ultra‐pure water were added, and transferred to a Teflon digestion vessel in agreement with Paniz et al . (2018). The determination of iron (Fe), potassium (K), calcium (Ca), magnesium (Mg), manganese (Mn), copper (Cu), and zinc (Zn) was performed using an inductively coupled plasma mass spectrometer (model ICP‐MS 7900; Agilent).…”

Section: Methodsmentioning

confidence: 99%

Brassinosteroids trigger tolerance to iron toxicity in rice

Tadaiesky

Silva

Batista

et al. 2020

Physiologia Plantarum

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Iron (Fe) toxicity is one of the most frequent abiotic stresses in rice, as it affects from 15% to 30% of the total production. Brassinosteroids (BRs), including 24‐epibrassinolide (EBR), regulate ion homeostasis and improve the antioxidant system. The aim of this research was to determine whether EBR can contribute to the tolerance of rice plants exposed to Fe toxicity and to evaluate the possible effect on anatomical characteristics, nutrient concentrations, the antioxidant system, and gas exchange. The experiment was randomized with four treatments, two with different concentrations of Fe (250 and 6250 μM, control and toxicity, respectively) and these were either supplied with EBR or not (0 and 10 nM EBR, described as −EBR and +EBR, respectively). Treating plants grown under Fe toxic conditions with EBR caused an 70% increase in root aerenchyma area, compared to plants without steroid treatment. Our results revealed that EBR treatment could mitigate the deleterious effects of Fe toxicity in rice plants, by modulating the aerenchyma area, which contributes to the formation of an oxidative barrier and reduce the Fe mobilization at the root surface. Plants that were exposed to Fe toxic concentrations and treated with EBR showed (1) an increase in the enzyme activities of superoxide dismutase, catalase, ascorbate peroxidase and peroxidase, (2) mitigation of oxidative damage and (3) increased scavenging of reactive oxygen species. Finally, EBR alleviated the negative impacts induced by excess Fe on the net photosynthetic rate and the instantaneous carboxylation efficiency. These benefits were directly related to higher electron transport and stomatal density and indirectly linked to the protection mechanism exercised by the antioxidant enzymes on photosynthetic machinery. We conclude that EBR is able to confer tolerance to Fe toxicity in rice plants.

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Section: Methodsmentioning

confidence: 99%

Brassinosteroids trigger tolerance to iron toxicity in rice

Tadaiesky

Silva

Batista

et al. 2020

Physiologia Plantarum

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“…Energy-dispersive spectroscopy (EDS) measurements were performed for the quantitative analysis of the elemental composition of the samples using a chemical microanalysis module (EDX) in the electron microscope. Iron concentration was determined using an inductively coupled plasma mass spectrometer (ICP-MS; Agilent 7900, Hachioji, Japan) . The samples were digested in 65% HNO 3 and diluted in water to obtain a 1 × 10 6 diluted solution.…”

Section: Experimental and Computational Detailsmentioning

confidence: 99%

Tailoring the Optical, Electronic, and Magnetic Properties of MAPbI₃ through Self-Assembled Fe Incorporation

et al. 2021

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We have produced Fe-doped paramagnetic MAPbI 3 microwires by using a novel strategy involving a self-assembly growth process of [PbI 6 ] 4− octahedral chains in the presence of liquid water. Structural and morphological studies confirmed that after the dissociation and recrystallization process, the doped samples preserved both the perovskite structure with a tetragonal phase and a microwire shape, while X-ray photoelectron spectroscopy revealed the presence of mixed-valence Fe 3+ /Fe 2+ ions with negligible change in the PbI 6 cage environment and the maximum valence band position. From first-principles calculations, we determined that Fe 2+ ions are localized in the interstitial site while Fe 3+ ones are substitutional on Pb sites. The very high mobility and static dielectric constant, achieved by photogenerated charge carriers in MAPbI 3 , are suppressed for Fe-doped MAPbI 3 samples. These results are discussed based on a nonradiative recombination process assisted by phonons that is activated by the inclusion of the Fe ions. Our ab initio calculations support this model that can be also used to explain the quenching of the photoluminescence emission peaks. The successful insertion of dopants that can tune the perovskite's physical properties is important to the development of functional devices and is also able to open new potential applications such as in magnetic/semiconducting devices.

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“…Pigments were quantified using a spectrophotometer (model UV‐M51; Bel Photonics), according to the methodology of Lichtenthaler and Buschmann (2001). The determination of Cd, K, Mg, Ca, Fe, Zn, Cu were carried out using an inductively coupled plasma mass spectrometer (model ICP‐MS 7900; Agilent) in agreement with Paniz et al (2018).…”

Section: Methodsmentioning

confidence: 99%

Leaf application of 24‐epibrassinolide mitigates cadmium toxicity in young Eucalyptus urophylla plants by modulating leaf anatomy and gas exchange

et al. 2020

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Cadmium (Cd2+) soil pollution is a global environmental problem caused by the high toxicity of Cd. 24‐Epibrassinolide (EBR) is a biodegradable plant steroid involved in response modulation to biotic and abiotic stresses. The aim of this study was to evaluate if the leaf‐application of EBR improves the gas exchange and possible repercussions on leaf anatomy in young Eucalyptus urophylla plants exposed to Cd toxicity. The experiment involved six treatments, which included three Cd concentrations (0, 450, and 900 μM) and two EBR concentrations (0 and 100 nM, described as – EBR and + EBR, respectively). Plants exposed to Cd toxicity suffered decreases in leaf anatomical and gas exchange parameters. However, the plants treated with EBR + 900 μM Cd showed an increase of 46%, 40%, and 54% in the net photosynthetic rate, water‐use efficiency, and instantaneous carboxylation efficiency, respectively. The EBR application‐induced improvements in gas exchange parameters, causing beneficial effects on the photosynthetic apparatus, mainly the effective quantum yield of photosystem II (PSII) photochemistry and electron transport rate. Furthermore, this steroid mitigated the effect of Cd toxicity on leaf anatomical variables, more specifically palisade and spongy parenchyma, which are intrinsically related to stomatal density, and stimulated the net photosynthetic rate of plants.

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Effective procedures for the determination of As, Cd, Cu, Fe, Hg, Mg, Mn, Ni, Pb, Se, Th, Zn, U and rare earth elements in plants and foodstuffs

Abstract: There are several international regulations regarding trace elements. The use of ICP-MS for their determination is usually a difficult task, especially when Hg is one of the target elements.

Cited by 61 publications

References 41 publications

Brassinosteroids trigger tolerance to iron toxicity in rice

Brassinosteroids trigger tolerance to iron toxicity in rice

Tailoring the Optical, Electronic, and Magnetic Properties of MAPbI₃ through Self-Assembled Fe Incorporation

Leaf application of 24‐epibrassinolide mitigates cadmium toxicity in young Eucalyptus urophylla plants by modulating leaf anatomy and gas exchange

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Effective procedures for the determination of As, Cd, Cu, Fe, Hg, Mg, Mn, Ni, Pb, Se, Th, Zn, U and rare earth elements in plants and foodstuffs

Abstract: There are several international regulations regarding trace elements. The use of ICP-MS for their determination is usually a difficult task, especially when Hg is one of the target elements.

Cited by 61 publications

References 41 publications

Brassinosteroids trigger tolerance to iron toxicity in rice

Brassinosteroids trigger tolerance to iron toxicity in rice

Tailoring the Optical, Electronic, and Magnetic Properties of MAPbI3 through Self-Assembled Fe Incorporation

Leaf application of 24‐epibrassinolide mitigates cadmium toxicity in young Eucalyptus urophylla plants by modulating leaf anatomy and gas exchange

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Tailoring the Optical, Electronic, and Magnetic Properties of MAPbI₃ through Self-Assembled Fe Incorporation