The Experts below are selected from a list of 22341 Experts worldwide ranked by ideXlab platform
María Luisa Pignata - One of the best experts on this subject based on the ideXlab platform.
-
Effects of co-cropping on soybean growth and stress response in lead-Polluted Soils.
Chemosphere, 2020Co-Authors: Carolina Vergara Cid, María Luisa Pignata, Judith Hebelen RodriguezAbstract:Phytoremediation by co-cropping may be a promising approach to produce safe crops while remediating the soil. However, the effects of plant interaction, especially stress response, remain unclear. The aims of this study were to investigate the effect of co-cropping on plant growth, stress response and lead (Pb) uptake in soybean and Tagetes minuta, and to assess the feasibility of agricultural production in Pb-Polluted Soils. A pot experiment was conducted to study the effect of co-cropping vs monocrop at three soil Pb concentrations. The following parameters were analyzed: biomass, Pb content in plants, and stress response indicators (chlorophylls, proteins, sugars, malondialdehyde, glutathione S-transferase activity, carotenes and antioxidant power). Results showed that in co-cropping, both species were benefited in Polluted Soils, since biomass and stress response were improved. T. minuta reduced adverse effects of Pb on soybean by improving grain quality and even survival in Polluted Soils, where soybean in monocrop grew only up to early vegetative stages. This effect was related to a 50% reduction in lipid peroxidation for soybean in co-cropping along with a sharp increase in the antioxidant response. In addition, co-cropping enhanced Pb accumulation in T. minuta (45% higher), as well as content of chlorophylls and carotenes (66% and 42% of increment, respectively) and glutathione S-transferase activity (two times higher) in the highly Polluted soil. Our results showed that rhizosphere interactions can help enhance tolerance to Pb toxicity in both species, allowing soybean production in highly Polluted Soils without posing health risk from grain consumption.
-
Auxin effects on Pb phytoextraction from Polluted Soils by Tegetes minuta L. and Bidens pilosa L.: Extractive power of their root exudates.
Journal of Hazardous Materials, 2016Co-Authors: María Julieta Salazar, Judith Hebelen Rodriguez, Carolina Vergara Cid, María Luisa PignataAbstract:The principal impediment for Pb uptake by plants is the Casparian strip in roots. It prevents metals reaching the xylem, thereby hampering translocation to the aerial organs. In the root apices, young root cells have thin cell walls and the Casparian strip is not completely developed, which could facilitate Pb uptake by roots at these vulnerable points. However, as the phytotoxic effects of Pb reduce root growth and enhance suberization, entry of Pb into the plant is avoided. We propose that the application of root growth promotors could be an important complement in the phytoextraction of Pb from Polluted Soils, due to their effects on produced biomass, Pb toxicity, and root exudate production. A greenhouse experiment was carried on to evaluate the auxin application effect on the Pb uptake of Bidens pilosa and Tagetes minuta. These species were sensitive to auxins, but the phytotoxic effect of Pb was not reversed by this treatment. Root exudates capable of extracting Pb were produced only when the species were grown in highly Polluted Soils, indicating a behavioral response to Pb exposure which is desirable for phytoremediation.
-
lead accumulation in plants grown in Polluted Soils screening of native species for phytoremediation
Journal of Geochemical Exploration, 2014Co-Authors: María Julieta Salazar, María Luisa PignataAbstract:Abstract In the present work, we focused on Soils contaminated with elevated lead concentrations in an agricultural and residential area surrounding a lead smelter plant in Bouwer, province of Cordoba, Argentina. The aim of this research work was to assess the phytoextraction suitability of native plant species growing in the vicinity of a former lead smelter. The lead concentration in leaves, stems and roots was determined in ten species collected at ten sampling sites along a lead concentration gradient in soil. It was found that at circa 1600 μg g − 1 Pb HCl 0.5 M extractable concentration in soil two native species, Tagetes minuta L. and Bidens pilosa L. accumulated high values of Pb concentration in leaves (380.5 μg g − 1 DW and 100.6 μg g − 1 DW, respectively). Therefore, T. minuta L. and B. pilosa L. have a considerable phytoremediation potential for lead Polluted Soils. At the same sampling site, Sorghum halepense (L.) Pers., a non-native species, only bioconcentrate lead in roots (1406.8 μg g − 1 DW) showing a phytostabilization potential. The results of this study should be further developed in order to confirm the potential use of these species in soil remediation programs.
Judith Hebelen Rodriguez - One of the best experts on this subject based on the ideXlab platform.
-
Effects of co-cropping on soybean growth and stress response in lead-Polluted Soils.
Chemosphere, 2020Co-Authors: Carolina Vergara Cid, María Luisa Pignata, Judith Hebelen RodriguezAbstract:Phytoremediation by co-cropping may be a promising approach to produce safe crops while remediating the soil. However, the effects of plant interaction, especially stress response, remain unclear. The aims of this study were to investigate the effect of co-cropping on plant growth, stress response and lead (Pb) uptake in soybean and Tagetes minuta, and to assess the feasibility of agricultural production in Pb-Polluted Soils. A pot experiment was conducted to study the effect of co-cropping vs monocrop at three soil Pb concentrations. The following parameters were analyzed: biomass, Pb content in plants, and stress response indicators (chlorophylls, proteins, sugars, malondialdehyde, glutathione S-transferase activity, carotenes and antioxidant power). Results showed that in co-cropping, both species were benefited in Polluted Soils, since biomass and stress response were improved. T. minuta reduced adverse effects of Pb on soybean by improving grain quality and even survival in Polluted Soils, where soybean in monocrop grew only up to early vegetative stages. This effect was related to a 50% reduction in lipid peroxidation for soybean in co-cropping along with a sharp increase in the antioxidant response. In addition, co-cropping enhanced Pb accumulation in T. minuta (45% higher), as well as content of chlorophylls and carotenes (66% and 42% of increment, respectively) and glutathione S-transferase activity (two times higher) in the highly Polluted soil. Our results showed that rhizosphere interactions can help enhance tolerance to Pb toxicity in both species, allowing soybean production in highly Polluted Soils without posing health risk from grain consumption.
-
Auxin effects on Pb phytoextraction from Polluted Soils by Tegetes minuta L. and Bidens pilosa L.: Extractive power of their root exudates.
Journal of Hazardous Materials, 2016Co-Authors: María Julieta Salazar, Judith Hebelen Rodriguez, Carolina Vergara Cid, María Luisa PignataAbstract:The principal impediment for Pb uptake by plants is the Casparian strip in roots. It prevents metals reaching the xylem, thereby hampering translocation to the aerial organs. In the root apices, young root cells have thin cell walls and the Casparian strip is not completely developed, which could facilitate Pb uptake by roots at these vulnerable points. However, as the phytotoxic effects of Pb reduce root growth and enhance suberization, entry of Pb into the plant is avoided. We propose that the application of root growth promotors could be an important complement in the phytoextraction of Pb from Polluted Soils, due to their effects on produced biomass, Pb toxicity, and root exudate production. A greenhouse experiment was carried on to evaluate the auxin application effect on the Pb uptake of Bidens pilosa and Tagetes minuta. These species were sensitive to auxins, but the phytotoxic effect of Pb was not reversed by this treatment. Root exudates capable of extracting Pb were produced only when the species were grown in highly Polluted Soils, indicating a behavioral response to Pb exposure which is desirable for phytoremediation.
Annette De Vaufleury - One of the best experts on this subject based on the ideXlab platform.
-
Ex situ environmental risk assessment of Polluted Soils using threshold guide values for the land snail Cantareus aspersus
Science of the Total Environment, 2020Co-Authors: Maxime Louzon, Benjamin Pauget, Frédéric Gimbert, Nadia Crini, Annette De VaufleuryAbstract:Environmental risk assessment of contaminated Soils should ideally be carried out with complementary approaches (chemical and biological) conducted in situ and ex situ. While biological methods based on the assessment of effect and bioaccumulation in bioindicators exists for soil fauna organisms, such as land snails, the methodology is currently limited in the field to 14 metallic elements (MEs). To provide new relevant tools to the stakeholders Polluted fields, the aim of this work is to determine ex situ threshold guide values (ex situ TGVs), for 15 MEs, 16 polycyclic aromatic hydrocarbons (PAHs) and 7 polychlorinated biphenyls (PCBs). These ex situ TGVs are the usual concentration of contaminants found in the viscera of the bioindicator Cantareus aspersus after 28 days of exposure to uncontaminated Soils. The second objective was to assess and validate the relevance of these ex situ TGVs for the interpretation of contamination levels in various European contaminated Soils based on global index calculations: i) The sum of the excess of transfers (SETs) and ii) the weighted SETs based on the general toxicity points of each contaminant used to evaluate the risk of transferred MEs, PAHs and PCBs (ERITMEs, ERITPAHs and ERITPCBs, respectively). In addition, the influence of soil physico-chemical properties on accumulation was modelled to better understand their roles in bioavailability. The presented ex situ TGV and the associated indicators (the global sum of the excess of transfers and global ecotoxicological risk) provide a basis by which stakeholders can prioritize the management of Polluted Soils depending on the risk they may represent. The determination of ex situ TGVs for organic and inorganic compounds provides new tools to characterize excess contaminant transfers, and it will also allow the use of snails for ERAs, notably for common pollutants, such as PAHs and PCBs for which guide values are not available.
Rosanna Ginocchio - One of the best experts on this subject based on the ideXlab platform.
-
Root Elongation Method for the Quality Assessment of Metal-Polluted Soils: Whole Soil or Soil-Water Extract?
Journal of Soil Science and Plant Nutrition, 2020Co-Authors: Eva V. Prudnikova, Alexander Neaman, Rosanna Ginocchio, Vera A. Terekhova, Mikhail M. Karpukhin, Evgenii L. Vorobeichik, Ivan A. Smorkalov, Elvira A. Dovletyarova, Claudia Navarro-villarroel, Patricia PeñalozaAbstract:Root elongation method may be implemented using two internationally accepted protocols: exposing plants to either soil-water extract or whole soil. But which of the two protocols is more suitable for root elongation analysis undertaken for the quality assessment of metal-Polluted Soils? Soils were sampled at various distances from the site of the Middle Urals Copper Smelter located in Russia. White mustard was used as a bioindicator. We observed considerable differences in root elongation under the two protocols. In plants grown in whole soil, root length inversely correlated with pollution index, but in soil-water extract, metal concentrations had no effect on root length. Nutrient and metal concentrations in the soil-water extract were not buffered, due to the absence of the solid soil phase. It is for this reason that in highly Polluted Soils, root growth was greater in soil-water extracts rather than in whole Soils, whereas in background Soils (in the absence of toxicity), root growth was greater in whole Soils compared with soil-water extracts. The quantity, intensity, and capacity factors are a plausible explanation for the differences in root length between the two protocols. The soil-water extract does not represent actual soil with respect to the desorption-dissolution reactions that take place between the soil solid phase and the soil solution. For this reason, whole soil protocol should be used for measuring root elongation given that only under this protocol, direct contact between metal-Polluted soil and test organisms correctly replicates the risks inherent in the actual soil habitat.
-
Simultaneous immobilization of metals and arsenic in acidic Polluted Soils near a copper smelter in central Chile
Environmental Science and Pollution Research, 2012Co-Authors: Valeska Cárcamo, Elena Bustamante, Elizabeth Trangolao, Luz María De La Fuente, Michel Mench, Alexander Neaman, Rosanna GinocchioAbstract:* Introduction : Acidic and metal(oid)-rich topSoils resulted after 34 years of continuous operations of a copper smelter in the Puchuncaví valley, central Chile. Currently, large-scale remediation actions for simultaneous in situ immobilization of metals and As are needed to reduce environmental risks of Polluted Soils. Aided phytostabilization is a cost-effective alternative, but adequate local available soil amendments have to be identified and management options have to be defined. * Materials and methods : Efficacy of seashell grit (SG), biosolids (B), natural zeolite (Z), and iron-activated zeolite (AZ), either alone or in mixtures, was evaluated for reducing metal (Cu and Zn) and As solubilization in Polluted Soils under laboratory conditions. Perennial ryegrass was used to test phytotoxicity of experimental substrates. * Results : Soil neutralization to a pH of 6.5 with SG, with or without incorporation of AZ, significantly reduces metal (Cu and Zn) solubilization without affecting As solubilization in soil pore water; furthermore, it eliminates phytotoxicity and excessive metal(oid) accumulation in aerial plant tissues. Addition of B or Z to SG-amended soil does not further reduce metal solubilization into soil pore water, but increase As solubilization due to excessive soil neutralization (pH > 6.5); however, no significant As increase occurs in aerial plant tissues. * Conclusion : Simultaneous in situ immobilization of metal(oid) in acidic topSoils is possible through aided phytostabilization.
-
Simultaneous immobilization of metals and arsenic in acidic Polluted Soils near a copper smelter in central Chile.
Environmental Science and Pollution Research, 2011Co-Authors: Valeska Cárcamo, Elena Bustamante, Elizabeth Trangolao, Luz María De La Fuente, Michel Mench, Alexander Neaman, Rosanna GinocchioAbstract:Introduction Acidic and metal(oid)-rich topSoils resulted after 34 years of continuous operations of a copper smelter in the Puchuncavi valley, central Chile. Currently, large-scale remediation actions for simultaneous in situ immobilization of metals and As are needed to reduce environmental risks of Polluted Soils. Aided phytostabilization is a cost-effective alternative, but adequate local available soil amendments have to be identified and management options have to be defined.
Carolina Vergara Cid - One of the best experts on this subject based on the ideXlab platform.
-
Effects of co-cropping on soybean growth and stress response in lead-Polluted Soils.
Chemosphere, 2020Co-Authors: Carolina Vergara Cid, María Luisa Pignata, Judith Hebelen RodriguezAbstract:Phytoremediation by co-cropping may be a promising approach to produce safe crops while remediating the soil. However, the effects of plant interaction, especially stress response, remain unclear. The aims of this study were to investigate the effect of co-cropping on plant growth, stress response and lead (Pb) uptake in soybean and Tagetes minuta, and to assess the feasibility of agricultural production in Pb-Polluted Soils. A pot experiment was conducted to study the effect of co-cropping vs monocrop at three soil Pb concentrations. The following parameters were analyzed: biomass, Pb content in plants, and stress response indicators (chlorophylls, proteins, sugars, malondialdehyde, glutathione S-transferase activity, carotenes and antioxidant power). Results showed that in co-cropping, both species were benefited in Polluted Soils, since biomass and stress response were improved. T. minuta reduced adverse effects of Pb on soybean by improving grain quality and even survival in Polluted Soils, where soybean in monocrop grew only up to early vegetative stages. This effect was related to a 50% reduction in lipid peroxidation for soybean in co-cropping along with a sharp increase in the antioxidant response. In addition, co-cropping enhanced Pb accumulation in T. minuta (45% higher), as well as content of chlorophylls and carotenes (66% and 42% of increment, respectively) and glutathione S-transferase activity (two times higher) in the highly Polluted soil. Our results showed that rhizosphere interactions can help enhance tolerance to Pb toxicity in both species, allowing soybean production in highly Polluted Soils without posing health risk from grain consumption.
-
Auxin effects on Pb phytoextraction from Polluted Soils by Tegetes minuta L. and Bidens pilosa L.: Extractive power of their root exudates.
Journal of Hazardous Materials, 2016Co-Authors: María Julieta Salazar, Judith Hebelen Rodriguez, Carolina Vergara Cid, María Luisa PignataAbstract:The principal impediment for Pb uptake by plants is the Casparian strip in roots. It prevents metals reaching the xylem, thereby hampering translocation to the aerial organs. In the root apices, young root cells have thin cell walls and the Casparian strip is not completely developed, which could facilitate Pb uptake by roots at these vulnerable points. However, as the phytotoxic effects of Pb reduce root growth and enhance suberization, entry of Pb into the plant is avoided. We propose that the application of root growth promotors could be an important complement in the phytoextraction of Pb from Polluted Soils, due to their effects on produced biomass, Pb toxicity, and root exudate production. A greenhouse experiment was carried on to evaluate the auxin application effect on the Pb uptake of Bidens pilosa and Tagetes minuta. These species were sensitive to auxins, but the phytotoxic effect of Pb was not reversed by this treatment. Root exudates capable of extracting Pb were produced only when the species were grown in highly Polluted Soils, indicating a behavioral response to Pb exposure which is desirable for phytoremediation.