scholarly journals Influence of Heavy Metals on the Nitrogen Metabolism in Plants

2021 ◽  
Author(s):  
Vitor Nascimento ◽  
Glauco Nogueira ◽  
Gabriel Monteiro ◽  
Waldemar Júnior ◽  
Joze Melissa Nunes de Freitas ◽  
...  
Keyword(s):  
Complex System ◽  
Heavy Metals ◽  
Nitrogen Metabolism ◽  
Essential Element ◽  
Plant Metabolism ◽  
Physiological System ◽  
Soil Composition ◽  
Anthropogenic Contribution ◽  
Species Specific ◽  
Specific Metal

As an essential element, Nitrogen is needed in large quantities for being an important component of cellular constituents and for plant metabolism, and its deficiency is one of the most common limitations for plant development. The study of the toxic effects of metal in plants involves a complex system of reactions that can be better determined once having a large attention of the different backgrounds of occurence to determinate how to proceed. The objective of this review is to add scientific knowledge, addressing the main functionalities and characteristics of this relation heavy metals – nitrogen metabolism in plant. Increasing industrialization and urbanization had anthropogenic contribution of heavy metals in biosphere and had largest availability in ecosystems. This toxicity in plants varies with plant species, specific metal, concentration, soil composition, as many heavy metals are considered to be essential for plant growth. Were provided data and reviews regarding the effect of heavy metals on nitrogen metabolism of plants and the responses of plants and the cross-talk of heavy metals and various stressors factors. Is clear to understand the relation between metals amount and the benefit or harm caused on plants, determining then, which mechanism should be activated to protect your physiological system.

Heavy Metals and Nitrogen Metabolism

2002 ◽  
pp. 325-355 ◽  
Author(s):  
Grażyna Kłobus ◽  
Marek Burzyński ◽  
Józef Buczek
Keyword(s):  
Heavy Metals ◽  
Nitrogen Metabolism

scholarly journals Biosorption of Heavy Metals by the Bacterial Exopolysaccharide FucoPol

2020 ◽  
Vol 10 (19) ◽  
pp. 6708
Author(s):  
Patrícia Concórdio-Reis ◽  
Maria A. M. Reis ◽  
Filomena Freitas
Keyword(s):  
Heavy Metals ◽  
Binding Sites ◽  
Metal Removal ◽  
Anthropogenic Activities ◽  
Chemical Methods ◽  
Ph Values ◽  
Bacterial Exopolysaccharide ◽  
Physical And Chemical ◽  
Specific Metal ◽  
Significant Health

Despite the efforts for minimizing the usage of heavy metals, anthropogenic activities still generate high amounts of wastewater containing these contaminants that cause significant health and environmental problems. Given the drawbacks of the conventional physical and chemical methods currently used, natural biosorbents (microbial cells or their products) arise as promising environmentally friendly alternatives. In this study, the binding efficiency of the polysaccharide secreted by Enterobacter A47, FucoPol, towards lead (Pb2+), cobalt (Co2+), copper (Cu2+) and zinc (Zn2+) cations was demonstrated. FucoPol revealed a higher performance for the biosorption of Pb2+, with a maximum overall metal removal of 93.9 ± 5.3% and a specific metal uptake of 41.1 ± 2.3 mg/gEPS, from a Pb2+ solution with an initial concentration of 10 mg/L, by a 5 g/L FucoPol solution. The overall metal removal decreased considerably (≤31.3 ± 1.6%) for higher Pb2+ concentrations (48 and 100 mg/L) probably due to the saturation of FucoPol’s binding sites. Pb2+ removal was also less efficient (66.0 ± 8.2%) when a higher FucoPol concentration (10 g/L) was tested. Pb2+ removal efficiency of FucoPol was maximized at pH 4.3, however, it was affected by lower pH values (2.5–3.3). Moreover, the FucoPol’s sorption performance was unaffected (overall metal removal: 91.6–93.9%) in the temperature range of 5–40 °C. These findings demonstrate FucoPol’s great potential for utilization as a biodegradable and safe biosorbent for treating waters and wastewaters contaminated with Pb2+.

Transfer of Heavy Metals (Cd, Pb, Cu and Zn) from Roadside Soil to Ornamental Plants in Nanjing, China

2011 ◽  
Vol 356-360 ◽  
pp. 3051-3054 ◽  
Author(s):  
Zhu Hong Ding ◽  
Xin Hu
Keyword(s):  
Heavy Metals ◽  
Inductively Coupled Plasma ◽  
Ornamental Plants ◽  
Translocation Factor ◽  
Emission Spectrometry ◽  
Roadside Soil ◽  
Inductively Coupled ◽  
Nanjing City ◽  
Species Specific ◽  
Cu And Zn

Roadside soil, dusts, and three ornamental plants-Begoniaceae (Begonia semperflorens Link et Otto), Tagetes (Tagetes erecta Linn.), and Salvia (Salvia splendens Ker-Gawle) were collected from urban arteries in Nanjing City, China. Concentrations of metals (Pb, Cd, Cu and Zn) were analyzed using inductively coupled plasma atom emission spectrometry and inductively coupled plasma mass spectrometry. Cd was the most important contaminant in roadside soil and dusts. Generally, Begoniaceae accumulated more metals than Tagetes and Salvia. The order of bioconcentration factor values for three kinds of plants were Cd > Cu > Zn > Pb, suggesting Cd was more easily accumulated by ornamental plants than Zn and Pb from soils to roots. The values of the translocation factor show the significant species specific characteristics on the ability of metals (Cd, Cu, Zn and Pb) translocation from roots to leaves. Begoniaceae was recommended as a bioindicator of heavy metals in the urban environment.

CHEMODYNAMICS OF TRACE POLLUTANTS DURING SNOWMELT ON ROOF AND STREET SURFACES

1994 ◽  
Vol 30 (1) ◽  
pp. 73-85 ◽  
Author(s):  
J. Daub ◽  
J. Förster ◽  
R. Herrmann ◽  
A. Robien ◽  
T. Striebel
Keyword(s):  
Heavy Metals ◽  
Suspended Solids ◽  
Chemical Properties ◽  
Snowmelt Runoff ◽  
Meltwater Runoff ◽  
Rainwater Runoff ◽  
High Concentrations ◽  
Physical And Chemical ◽  
Specific Metal ◽  
And Chemical Properties

In order to investigate the concentration levels and chemodynamic behaviour of organic micropollutants and heavy metals in snowmelt runoff from urban sealed surfaces, meltwater was sampled from one street :and four different roof catchments. Apart from peak concentrations of suspended solids during short intense street runoff from rain, concentrations of suspended solids in snowmelt runoff are two to fivefold higher than in rain runoff. However, the specific metal concentrations in suspended solids of snowmelt (except Zn) are lower than in suspended solids of rainwater runoff. This partly compensates the higher concentration of suspended solids. There are no distinct differences in concentrations of heavy metals between rain and meltwater runoff willi the exception of dissolved Cd; its concentrations are increased when high concentrations of macro ions are present. We explain high concentrations of PAH with a molecular weight of 202 or less in snowmelt with longer equilibration times available during melting than during rain runoff. An enhancement of solubility by DOC seems to be likely. The physical and chemical properties of various roof surfaces greatly influence the temporal variation of PAH concentrations during snowmelt runoff.

scholarly journals Intensity of free radical processes in the leaves of arboreal plants under act of industrial dust borne extracts

2010 ◽  
pp. 83-87
Author(s):  
Olga Piskova ◽  
Vitalii Gryshko
Keyword(s):  
Heavy Metals ◽  
Lipid Peroxidation ◽  
Contamination Level ◽  
Base Line ◽  
Picea Pungens ◽  
Industrial Dust ◽  
Species Specific ◽  
Line Level ◽  
Radical Processes

The influence of industrial pollutants on the intensity of lipid peroxidation in the assimilatory organs of arboreal plant was investigated. The differential changes of the probed indexes are set depending on the species. Information is got can testify to participation of lipid peroxidation products in forming of reactions-answers of arboreal plants on influence of industrial dust borne extract with content of heavy metals. Determination of level and rates of accumulation of Zn, Ni, Pb and Cd, in the leaves of arboreal plants in the conditions of different contamination level allowed to take species to two groups. To the first (phytoextraction potential exceeds a base-line level in 10 times) belong Populus bolleana Lauche, P. italica (Du Roi) Moench, Picea pungens Engelm and Sorbus aucuparia L. To the second (exceeds a base-line level from 5 to 10 times) belong Acer negundo L., Aesculus hippocastanum L., Betula pendula Roth and Tilia cordata Mill. The most substantial increase of peroxidation secondary product content (more than in 2.5 times) is peculiar for B. pendula, A. hippocastanum and P. pungens Engelm., that well conforms to the rates of heavy metals translocation, it has however species-specific character.

A Comparative Study of Metal Content in Selected Polish and Romanian Honey Samples

2017 ◽  
Vol 68 (6) ◽  
pp. 1163-1169 ◽  
Author(s):  
Cornelia Purcarea ◽  
Malgorzata Dzugan ◽  
Monika Wesolowska ◽  
Adriana Monica Chis ◽  
Grzegorz Zagula ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Heavy Metal ◽  
Mineral Content ◽  
Aluminum Content ◽  
Heavy Metal Contamination ◽  
Lead Level ◽  
Lead Contamination ◽  
Soil Composition ◽  
Mineral Concentration ◽  
Cadmium And Lead

The aim of the study was to compare the heavy metal contamination and study the mineral content of Polish and Romanian honeys. We used Polish varietal honeys (n=18) produced in the year 2013-2014 in ecologically clean Podkarpackie region, and Romanian honeys (n=36) from Bihor district produced in 2013. The heavy metals concentration as well as mineral composition of honey was assayed by ICP-OES method with prior microwave mineralization. The cadmium and lead level in tested Polish honeys ranged from 0.007 to 0.021mg/kg and 0.02 to 0.098 mg/kg, respectively. Cadmium was not detected in Romanian honeys, and the lead contamination was lower than in Polish honey (0.018-0.05 mg/kg). Mercury was not detected in any tested honey samples. The aluminum content in Polish honeydew honeys was 34.6-times higher than in Romanian honeys. Honey samples from Poland were richest in potassium (2.5-fold for honeydew, lime and acacia, excluding heather), but they included less calcium. Generally, dark honeys include the highest mineral concentration and are more contaminated by heavy metals. However, all tested samples met the legal requirements for heavy metals residues. The geographical origin and soil composition strongly influenced honey chemical composition and the crucial factor for heavy metal transfer seems to be soil pH.

scholarly journals Response of Four Russula Species under Copper Sulphate and Lead Acetate Treatments

2013 ◽  
Vol 41 (2) ◽  
pp. 538 ◽  
Author(s):  
Gabriela BUSUIOC ◽  
Carmen Cristina ELEKES
Keyword(s):  
Heavy Metals ◽  
Heavy Metal ◽  
Fruiting Body ◽  
Lead Acetate ◽  
Metal Content ◽  
Metal Mobility ◽  
Mushroom Species ◽  
Metal Absorption ◽  
Specific Affinity ◽  
Species Specific

Mushrooms have a species-specific affinity for heavy metals in soil. Therefore, mushrooms may act as an effective bioaccumulator of metals, thus can be used in mycoremediation technologies to remove and recover heavy metals from soil. The response of four Russula species to copper sulfate and lead acetate treatments concerning the absorption, accumulation and translocation of Fe, Cu, Zn, Mn and Pb was studied. Differences in metal concentrations were recorded between caps and stipes of the fruiting body and varied widely between the tested species. This confirms the species-dependent features of heavy metal absorption in mushrooms. Another factor that showed an influence on the bioavailability of metals in mushrooms was the metal content of soil. Similarities between the absorption and accumulation of copper and zinc were observed for R. vesca and R. atropurpurea. The treatments influenced the bioabsorption of heavy metals by the mushrooms and the metal mobility in the fruiting body. After lead acetate treatment, R. vesca, R. atropurpurea and R. integra had an increased bioaccumulation capacity compared to the control. Hyperaccumulating species, such as R. nigricans for lead soil pollution, would lead to the best results for mycoremediation as they are capable of accumulating higher concentration of heavy metals in comparison to other mushroom species.

Sign in / Sign up

Export Citation Format

Share Document