scholarly journals Modeling of Cd Uptake and Efflux Kinetics in Metal-Resistant BacteriumCupriavidus metallidurans

2010 ◽  
Vol 44 (12) ◽  
pp. 4597-4602 ◽  
Author(s):  
Rita Hajdu ◽  
José Paulo Pinheiro ◽  
Josep Galceran ◽  
Vera I. Slaveykova
Keyword(s):  
Cd Uptake ◽  
Efflux Kinetics

scholarly journals Growth and Antioxidant Responses in Iron-Biofortified Lentil under Cadmium Stress

Toxics ◽  
2021 ◽  
Vol 9 (8) ◽  
pp. 182
Author(s):  
Ruchi Bansal ◽  
Swati Priya ◽  
Harsh Kumar Dikshit ◽  
Sherry Rachel Jacob ◽  
Mahesh Rao ◽  
...  
Keyword(s):  
Growth Parameters ◽  
Dry Weight ◽  
Cadmium Stress ◽  
Antioxidant Enzyme Activities ◽  
Limited Information ◽  
Cd Stress ◽  
Fresh Weight ◽  
Cd Uptake ◽  
Cd Tolerance ◽  
Controlled Conditions

Cadmium (Cd) is a hazardous heavy metal, toxic to our ecosystem even at low concentrations. Cd stress negatively affects plant growth and development by triggering oxidative stress. Limited information is available on the role of iron (Fe) in ameliorating Cd stress tolerance in legumes. This study assessed the effect of Cd stress in two lentil (Lens culinaris Medik.) varieties differing in seed Fe concentration (L4717 (Fe-biofortified) and JL3) under controlled conditions. Six biochemical traits, five growth parameters, and Cd uptake were recorded at the seedling stage (21 days after sowing) in the studied genotypes grown under controlled conditions at two levels (100 μM and 200 μM) of cadmium chloride (CdCl2). The studied traits revealed significant genotype, treatment, and genotype × treatment interactions. Cd-induced oxidative damage led to the accumulation of hydrogen peroxide (H2O2) and malondialdehyde in both genotypes. JL3 accumulated 77.1% more H2O2 and 75% more lipid peroxidation products than L4717 at the high Cd level. Antioxidant enzyme activities increased in response to Cd stress, with significant genotype, treatment, and genotype × treatment interactions (p < 0.01). L4717 had remarkably higher catalase (40.5%), peroxidase (43.9%), superoxide dismutase (31.7%), and glutathione reductase (47.3%) activities than JL3 under high Cd conditions. In addition, L4717 sustained better growth in terms of fresh weight and dry weight than JL3 under stress. JL3 exhibited high Cd uptake (14.87 mg g−1 fresh weight) compared to L4717 (7.32 mg g−1 fresh weight). The study concluded that the Fe-biofortified lentil genotype L4717 exhibited Cd tolerance by inciting an efficient antioxidative response to Cd toxicity. Further studies are required to elucidate the possibility of seed Fe content as a surrogacy trait for Cd tolerance.

scholarly journals Citric acid inhibits Cd uptake by improving the preferential transport of Mn and triggering the defense response of amino acids in grains

2021 ◽  
Vol 211 ◽  
pp. 111921
Author(s):  
Weijie Xue ◽  
Peipei Wang ◽  
Li Tang ◽  
Changbo Zhang ◽  
Changrong Wang ◽  
...  
Keyword(s):  
Amino Acids ◽  
Citric Acid ◽  
Defense Response ◽  
Cd Uptake ◽  
Preferential Transport

scholarly journals Humic + Fulvic acid mitigated Cd adverse effects on plant growth, physiology and biochemical properties of garden cress

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Ertan Yildirim ◽  
Melek Ekinci ◽  
Metin Turan ◽  
Güleray Ağar ◽  
Atilla Dursun ◽  
...  
Keyword(s):  
Heavy Metal ◽  
Adverse Effects ◽  
Plant Growth ◽  
Fulvic Acid ◽  
Pollution Level ◽  
Hydroxyl Groups ◽  
Cd Stress ◽  
Garden Cress ◽  
Cd Uptake ◽  
Fresh Leaf

AbstractCadmium (Cd) is a toxic and very mobile heavy metal that can be adsorbed and uptaken by plants in large quantities without any visible sign. Therefore, stabilization of Cd before uptake is crucial to the conservation of biodiversity and food safety. Owing to the high number of carboxyl and phenolic hydroxyl groups in their structure, humic substances form strong bonds with heavy metals which makes them perfect stabilizing agents. The aim of this study was to determine the effects of humic and fulvic acid (HA + FA) levels (0, 3500, 5250, and 7000 mg/L) on alleviation of Cadmium (Cd) toxicity in garden cress (Lepidium sativum) contaminated with Cd (CdSO4.8H2O) (0, 100, and 200 Cd mg/kg) under greenhouse conditions. Our results showed that, Cd stress had a negative effect on the growth of garden cress, decreased leaf fresh, leaf dry, root fresh and root dry weights, leaf relative water content (LRWC), and mineral content except for Cd, and increased the membrane permeability (MP) and enzyme (CAT, SOD and POD) activity. However, the HA + FA applications decreased the adverse effects of the Cd pollution. At 200 mg/kg Cd pollution, HA + FA application at a concentration of 7000 mg/L increased the leaf fresh, leaf dry, root fresh, root dry weights, stem diameter, leaf area, chlorophyll reading value (CRV), MP, and LRWC values by 262%, 137%, 550%,133%, 92%, 104%, 34%, 537%, and 32% respectively, compared to the control. Although the highest H2O2, MDA, proline and sucrose values were obtained at 200 mg/L Cd pollution, HA + FA application at a concentration of 7000 mg/L successfully alleviated the deleterious effects of Cd stress by decreasing H2O2, MDA, proline, and sucrose values by 66%, 68%, 70%, and 56%, respectively at 200 mg/kg Cd pollution level. HA + FA application at a concentration of 7000 mg/L successfully mitigated the negative impacts of Cd pollution by enhanced N, P, K, Ca, Mg, Fe, Mn, Cu, Mn, Zn, and B by 75%, 23%, 84%, 87%, 40%, 85%, 143%, 1%, 65%, and 115%, respectively. In addition, HA + FA application at a concentration of 7000 mg/L successfully reduced Cd uptake by 95% and Cl uptake by 80%. Considering the plant growth parameters, the best results were determined when HA + FA concentration was 7000 mg/L. We have shown that, it is critical to apply a humic substance with high percentage of FA, which was 10% in this study, to mitigate the adverse effects of heavy metal stress on plant growth. In conclusion, the application of HA + FA may be suggested as an effective solution for reducing the Cd uptake of the plants by stabilizing Cd in soil and preventing translocation of Cd from the roots of plant to its shoot and leaves.

scholarly journals Identifying Controlling Factors of Bioaccumulation of Selected Metal(loid)s in Various Soil–Cereal Crop Systems within Cultivated Fluvisols

Agronomy ◽  
2021 ◽  
Vol 11 (6) ◽  
pp. 1180
Author(s):  
Jan Skála ◽  
Radim Vácha ◽  
Jarmila Čechmánková
Keyword(s):  
Plant Uptake ◽  
Ph Value ◽  
Soil Parameters ◽  
Significant Variable ◽  
Cd Uptake ◽  
Crop Models ◽  
Successful Model ◽  
Model Reliability ◽  
Contamination Levels ◽  
Single Extractions

The paired Fluvisol and cereal samples in both the field screening and controlled experiments are reported to elucidate the soil–crop relationship for As, Cd, and Pb in relation to changing contamination levels. Significant varietal differences in plant uptake were observed for crop type (barley, triticale) and the harvested part of the crop (oat shoots and grain). When parametrizing the stepwise regression models, the inclusion of soil properties often improved the performance of soil–crop models but diverse critical soil parameters were retained in the model for individual metal(loid)s. The pH value was often a statistically significant variable for Cd uptake. For As and Pb, the more successful model fit was achieved using the indicators of quantity or quality of soil organic matter, but always with lower inherent model reliability compared to Cd. Further, a single correlation analysis was used to investigate the relationship between extractable metal concentrations in soil solution and their crop accumulation. For Cd, there were strong intercorrelations among single extractions, the NH4NO3 extraction stood out with perfect correlation with plant uptake in both experiments. For As and Pb, the CaCl2 and Na2EDTA solutions outperformed other single extractions and were the better choice for the assessment of depositional fluvial substrates.

Soil amendment affects Cd uptake by wheat — are we underestimating the risks from chloride inputs?

2016 ◽  
Vol 554-555 ◽  
pp. 349-357 ◽  
Author(s):  
A. Sigrun Dahlin ◽  
Jan Eriksson ◽  
Colin D. Campbell ◽  
Ingrid Öborn
Keyword(s):  
Soil Amendment ◽  
Cd Uptake

Interaction of silicon and cadmium in Brassica juncea and Brassica napus

Biologia ◽  
2012 ◽  
Vol 67 (3) ◽  
Author(s):  
Zuzana Vatehová ◽  
Karin Kollárová ◽  
Ivan Zelko ◽  
Danica Richterová-Kučerová ◽  
Marek Bujdoš ◽  
...  
Keyword(s):  
Lateral Roots ◽  
Root Apex ◽  
Brassica Species ◽  
Inhibitory Effects ◽  
Cd Uptake ◽  
Primary Roots ◽  
Suberin Lamellae ◽  
Root And Shoot Growth ◽  
The Impact ◽  
Si Addition

AbstractThe objective of this study was to determine the effect of silicon (Si) and cadmium (Cd) on root and shoot growth and Cd uptake in two hydroponically cultivated Brassica species (B. juncea (L.) Czern. cv. Vitasso and B. napus L. cv. Atlantic). Both species are potentially usable for phytoextraction. Inhibitory effects of Cd on root elongation were diminished by the impact of Si. Primary roots elongation in the presence of Cd + Si compared with Cd was stronger and the number of lateral roots was lower in B. juncea than in B. napus. Cd content per plant was higher in B. napus roots and shoots compared with B. juncea. Suberin lamellae were formed closer to the root apex in Cd + Si than in Cd treated plants and this effect was stronger in B. napus than in B. juncea. Accelerated maturation of endodermis was associated with reduced Cd uptake. Cd decreased the content of chlorophylls and carotenoids in both species, but Si addition positively influenced the content of photosynthetic pigments which was higher in B. napus than in B. juncea. Si enhanced more substantially translocation of Cd into the shoot of B. napus than of B. juncea. Based on our results B. napus seems to be more suitable for Cd phytoextraction than B. juncea because these plants produce more biomass and accumulate higher amount of Cd. The protective effect of Si on Cd treated Brassica plants could be attributed to more extensive development of suberin lamellae in endodermis.

scholarly journals Applying Tire Rubber Ash Enriched Cow Manure as a Useful Way to Decrease Canola Cd Uptake in a Polluted Soil

2018 ◽  
Vol In Press (In Press) ◽  
Author(s):  
Amir Hossein Baghaie ◽  
Forough Aghili ◽  
Ali Hassani Joshaghani
Keyword(s):  
Polluted Soil ◽  
Cow Manure ◽  
Cd Uptake ◽  
Tire Rubber
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