Phytoextraction efficiency of Arabidopsis halleri is driven by the plant and not by soil metal concentration

Chemosphere ◽  
2021 ◽  
pp. 131437
Author(s):  
Charlotte C. Dietrich ◽  
Susan Tandy ◽  
Kamila Murawska-Wlodarczyk ◽  
Angelika Banaś ◽  
Urszula Korzeniak ◽  
...  
Keyword(s):  
Metal Concentration ◽  
Arabidopsis Halleri ◽  
Soil Metal ◽  
Phytoextraction Efficiency

scholarly journals Metal bioaccumulation alleviates the negative effects of herbivory on plant growth

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Grazieli F. Dueli ◽  
Og DeSouza ◽  
Servio P. Ribeiro
Keyword(s):  
Plant Growth ◽  
Metal Concentration ◽  
Plant Species ◽  
Metal Ion ◽  
Natural Habitat ◽  
Plant Responses ◽  
Metal Bioaccumulation ◽  
Negative Effects ◽  
Quantitative Evidence ◽  
Soil Metal

AbstractMetalliferous soils can selectively shape plant species’ physiology towards tolerance of high metal concentrations that are usually toxic to organisms. Some adapted plant species tolerate and accumulate metal in their tissues. These metals can serve as an elemental defence but can also decrease growth. Our investigation explored the capacity of natural metal accumulation in a tropical tree species, Eremanthus erythropappus (Asteraceae) and the effects of such bioaccumulation on plant responses to herbivory. Seedlings of E. erythropappus were grown in a glasshouse on soils that represented a metal concentration gradient (Al, Cu, Fe, Mn and Zn), and then the exposed plants were fed to the herbivores in a natural habitat. The effect of herbivory on plant growth was significantly mediated by foliar metal ion concentrations. The results suggest that herbivory effects on these plants change from negative to positive depending on soil metal concentration. Hence, these results provide quantitative evidence for a previously unsuspected interaction between herbivory and metal bioaccumulation on plant growth.

Positive Relationship between Mortality from Alzheimer's Disease and Soil Metal Concentration in Mainland China

2014 ◽  
Vol 42 (3) ◽  
pp. 893-900 ◽  
Author(s):  
Xiao-Li Shen ◽  
Jian-Han Yu ◽  
Dong-Feng Zhang ◽  
Jun-Xia Xie ◽  
Hong Jiang
Keyword(s):  
Alzheimer’S Disease ◽  
Alzheimer's Disease ◽  
Metal Concentration ◽  
Positive Relationship ◽  
Mainland China ◽  
Soil Metal

scholarly journals Nitrogen fixation and growth response of Alnus rubra amended with low and high metal content biosolids

2006 ◽  
Vol 63 (4) ◽  
pp. 351-360 ◽  
Author(s):  
Linda S. Gaulke ◽  
Charles L. Henry ◽  
Sally L. Brown
Keyword(s):  
Metal Concentration ◽  
Land Application ◽  
Total Carbon ◽  
Shoot Biomass ◽  
Alnus Rubra ◽  
N Fixation ◽  
Metal Concentrations ◽  
Compost Amendment ◽  
High Metal ◽  
Soil Metal

Forest application of biosolids offers a potential environmentally friendly alternative to landfilling. This two-year investigation was designed to analyze the effects of elevated soil metal concentration resulting from the land application of biosolids on the symbiotic, nitrogen (N) fixing relationship between Alnus rubra Bong. (red alder) and Frankia. High metal biosolids and a modern-day composted biosolid applied at high loading rates of 250, 500, and 1000 Mg ha-1, were used to represent a worst-case scenario for metal contamination. The high metal biosolids were obtained before the current regulations were formulated and had been lagooned prior to use in this study. Total cadmium (Cd), lead (Pb) and zinc (Zn) in the high metal biosolids were 45, 958, and 2623 mg kg-1 respectively. These metal concentrations are above current regulatory limits in the US. The compost was made using biosolids that are currently produced and had Cd, Pb and Zn of 0.8, 20 and 160 mg kg-1 respectively. Trees were harvested and analyzed for rate of N fixation (as measured by acetylene reduction activity), biomass, and foliar metals. Soils were analyzed for available N, total carbon and N, pH and total Cd, Pb and Zn. Rates of N fixation were not affected by soil amendment. In year 2, shoot biomass of trees grown in both the compost and high metal amendments were higher than the control. Shoot biomass increased with increasing amount of compost amendments, but decreased with increasing amount of high metal amendments. There was no relationship between soil metal concentration and plant biomass. Foliar Cd and Pb were below detection for all trees and foliar Zn increased with increasing amount of both compost and high metal amendment, with concentrations of 249 mg kg-1 for trees grown in the compost amendment and 279 mg kg-1 for the high metal amendment. The results from this study indicate that the growth of A. rubra benefited from both types of biosolids used in the study and that the Alnus/Frankia relationship was not negatively impacted by metal concentrations resulting from the high metal biosolids amendments.

Relative impact of soil, metal source and metal concentration on bacterial community structure and community tolerance

2010 ◽  
Vol 42 (9) ◽  
pp. 1408-1417 ◽  
Author(s):  
Catriona A. Macdonald ◽  
Xueyun Yang ◽  
Ian M. Clark ◽  
Fang-Jie Zhao ◽  
Penny R. Hirsch ◽  
...  
Keyword(s):  
Community Structure ◽  
Bacterial Community ◽  
Metal Concentration ◽  
Bacterial Community Structure ◽  
Relative Impact ◽  
Metal Source ◽  
Community Tolerance ◽  
Soil Metal

scholarly journals Prediction Models Founded on Soil Characteristics for the Estimated Uptake of Nine Metals by Okra Plant, Abelmoschus esculentus (L.) Moench., Cultivated in Agricultural Soils Modified with Varying Sewage Sludge Concentrations

2021 ◽  
Vol 13 (22) ◽  
pp. 12356
Author(s):  
Ebrahem M. Eid ◽  
Kamal H. Shaltout ◽  
Saad A. M. Alamri ◽  
Sulaiman A. Alrumman ◽  
Nasser Sewelam ◽  
...  
Keyword(s):  
Sewage Sludge ◽  
Metal Concentration ◽  
High Performance ◽  
Prediction Models ◽  
Agricultural Soils ◽  
Soil Characteristics ◽  
Abelmoschus Esculentus ◽  
Plant Tissues ◽  
Performance Accuracy ◽  
Soil Metal

Prediction models were developed to estimate the extent to which the metals Cd, Co, Cr, Cu, Fe, Mn, Ni, Pb, and Zn were taken up by the fruits, the leaves, the stems, and the roots of the okra plant, Abelmoschus esculentus (L.) Moench., grown under greenhouse conditions in soil modified with a spectrum of sewage sludge concentrations: 0, 10, 20, 30, 40, and 50 g/kg. All the metals under investigation, apart from Cd, were more concentrated in the A. esculentus roots than in any other organ. Overall, the sum of the metal concentration (mg/kg) within the varying plant tissues can be ranked in the following order: roots (13,795.5) > leaves (1252.7) > fruits (489.3) > stems (469.6). For five of the metals (i.e., Cd, Co, Fe, Mn, and Pb), the BCF was <1; for the remaining four metals, the BCF was >1, (i.e., Cr, 1.074; Cu, 1.347; Ni, 1.576; and Zn, 1.031). The metal BCFs were negatively correlated with the pH of the soil and positively correlated with soil OM content. The above-ground tissues exhibited a TF < 1 for all metals, apart from Cd with respect to the leaves (2.003) and the fruits (2.489), and with the exception of Mn in relation to the leaves (1.149). Further positive associations were demonstrated for the concentrations of all the metals in each examined plant tissue and the corresponding soil metal concentration. The tissue uptakes of the nine metals were negatively correlated with soil pH, but positively associated with the OM content in the soil. The generated models showed high performance accuracy; students’ t-tests indicated that any differences between the measured and forecasted concentrations of the nine metals within the four tissue types of A. esculentus failed to reach significance. It can, therefore, be surmised that the prediction models described in the current research form a feasible method with which to determine the safety and risk to human health when cultivating the tested species in soils modified with sewage sludge.

PREDICTIVE SIMULATION AND OPTIMIZATION ORIENTED MODELING FOR THE EXTRACTION OF METAL IONS FROM SOLUTIONS INTO A NOVEL BIS-SCHIFF BASE

2019 ◽  
pp. 1-8
Author(s):  
F. S. Nworie ◽  
S. O. Ngele ◽  
J. C. Onah
Keyword(s):  
Metal Ions ◽  
Metal Concentration ◽  
Acid Concentration ◽  
Aqueous Media ◽  
Industrial Effluents ◽  
Ligand Concentration ◽  
Simulation And Optimization ◽  
Chemometric Technique ◽  
Model Equations ◽  
Level Of Significance

Metal ions present in waste samples, industrial effluents, acid mines and other aqueous media constitute a serious challenge in different human activities. Solvent extraction a technique for preconcentration, separation and identification of trace amount of metal ions coupled with multivariate chemometric technique was used for the determination of Fe(II) and Cr(III) from solutions in the presence of bis(salicylidene)ethylenediamine (SALEN). The influence of main extraction variables affecting the extraction efficiency was simultaneously studied and regression model equations illustrating the relationship between variables predicted. The extraction parameters (time of extraction, acid concentration, ligand concentration, temperature and metal concentration) were optimized using experimental designs with the contributions of the various parameters to extraction of the metal ions bound to the complexone evaluated using SPSS19.0 software. The statistically determined simulated models for the parameters were R2 = 0.946, 0.727, 0.793, 0.53, 0.53, 1.000 and F- values of 70.400, 13. 285, 15.348, 4.646 and 2.569×105 respectively for time of extraction, acid concentration, ligand concentration, temperature and metal concentration for Cr (III). For Fe (II), R2 = 0.243, 0.371, 0.519, 0.446, 1.000 and F-values of 0.964, 2.953, 4.310, 3.216 and 2.516×105 for time of extraction, acid concentration, ligand concentration, temperature and metal concentration respectively. The level of significance of the models as predicted was both lower than 5% making it feasible, efficient, reproducible and accurate. This means that metal ions at the conditions stated could be removed from waste samples, industrial effluents, acid mines and other aqueous media with extension in industrial scale application.

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