Features of Cd and Ni accumulation by Larix sukaczewii Dyl. under technogenesis

Abstract Salicylic acid (SA) and jasmonic acid (JA) as plant growth regulators (PGRs) have the potential to ameliorate plant development and tolerance to deleterious effects of toxic metals like nickel (Ni). Therefore, the current study was carried out to evaluate SA and JA's interactive effect on the root antioxidative response of two Alyssum inflatum Nyár. populations against Ni-toxicity. Two A. inflatum species under Ni-stress conditions (0, 100, 200, and 400 µM) were exposed to alone or combined levels of SA (0, 50, and 200 µM) and JA (0, 5, and 10 µM) treatments. Results showed that high Ni doses reduced the roots fresh weight (FW) in two populations than control; however, the use of external PGRs had ameliorated roots biomass by mitigated Ni-toxicity. Under Ni toxicity, SA and JA, especially their combination, induced high Ni accumulation in plants' roots. Moreover, the application of SA and JA alone, as well as combined SA + JA, was found to be effective in the scavenging of hydrogen peroxide (H2O2) by improving the activity of superoxide dismutase (SOD), peroxidase (POD), catalase (CAT), and ascorbate peroxidase (APX) in both populations under Ni-toxicity. Overall, our results manifest that SA and JA's external use, especially combined SA + JA treatments, ameliorate root biomass and plant tolerance by restricting translocation Ni to the shoot, accumulating in roots, and also enhancing antioxidant defense systems.

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A Study of Metal Accumulation Trends in Sediment Cores from the Turkey Lakes (Algoma, Ontario)

Canadian Journal of Fisheries and Aquatic Sciences ◽

10.1139/f88-279 ◽

1988 ◽

Vol 45 (S1) ◽

pp. s145-s154 ◽

Cited By ~ 5

Author(s):

J. R. Morris ◽

W. Kwain

Keyword(s):

Dry Matter ◽

Metal Accumulation ◽

Sediment Cores ◽

Sediment Surface ◽

Sedimentation Rates ◽

Accumulation Rates ◽

Spatial Trends ◽

Pb Accumulation ◽

Lead Zinc ◽

Ni Accumulation

Temporal (vertical) and spatial trends in sediment accumulations of nonresidual aluminum, manganese, lead, zinc, copper, and nickel were investigated in 18 core samples collected from four of the Turkey Lakes in 1980–81. Accumulation rates of nonresidual Al differed among sampling sites, both within and among lakes, but was assumed to have been temporally constant at each location. Concentrations of dry matter and all other metals were expressed as mass per unit mass of Al. Cumulative Al was used as an index of time. Since Mn enrichments near the sediment surface may reflect an oxidation zone, they were not interpreted as increased Mn inputs. Other metal enrichments were considered anthropogenic. Little Pb occurred at the bottom of sediment cores, but Pb accumulation rates increased greatly towards the sediment surface. Major Pb enrichments were assumed to have begun at 1940. Zn accumulation rates had also progressively increased through most of the previous four decades. During the same period, there was a modest rise in Cu and Ni accumulation rates. Metal accumulation rates differed considerably among lakes, and among sites within lakes, but these differences primarily reflected variations in dry matter sedimentation rates.

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Ni2+ Transport and Accumulation inRhodospirillum rubrum

Journal of Bacteriology ◽

10.1128/jb.181.15.4554-4560.1999 ◽

1999 ◽

Vol 181 (15) ◽

pp. 4554-4560 ◽

Cited By ~ 36

Author(s):

Richard K. Watt ◽

Paul W. Ludden

Keyword(s):

Gene Products ◽

Wild Type ◽

Divalent Metal Ions ◽

Co Dehydrogenase ◽

Reading Frame ◽

Carbonyl Cyanide ◽

Transport Assay ◽

Fold Excess ◽

Ni Accumulation

ABSTRACT The cooCTJ gene products are coexpressed with CO-dehydrogenase (CODH) and facilitate in vivo nickel insertion into CODH. A Ni2+ transport assay was used to monitor uptake and accumulation of 63Ni2+ into R. rubrum and to observe the effect of mutations in thecooC, cooT, and cooJ genes on63Ni2+ transport and accumulation. Cells grown either in the presence or absence of CO transported Ni2+with a Km of 19 ± 4 μM and aV max of 310 ± 22 pmol of Ni/min/mg of total protein. Insertional mutations disrupting the reading frame of the cooCTJ genes, either individually or all three genes simultaneously, transported Ni2+ the same as wild-type cells. The nickel specificity for transport was tested by conducting the transport assay in the presence of other divalent metal ions. At a 17-fold excess Mn2+, Mg2+, Ca2+, and Zn2+ showed no inhibition of63Ni2+ transport but Co2+, Cd2+, and Cu2+ inhibited transport 35, 58, and 66%, respectively. Nickel transport was inhibited by cold (50% at 4°C), by protonophores (carbonyl cyanidem-chlorophenylhydrazone, 44%, and 2,4-dinitrophenol, 26%), by sodium azide (25%), and hydroxyl amine (33%). Inhibitors of ATP synthase (N,N′-dicyclohexylcarbodiimide and oligomycin) and incubation of cells in the dark stimulated Ni2+ transport. 63Ni accumulation after 2 h was four times greater in CO-induced cells than in cells not exposed to CO. The CO-stimulated 63Ni2+ accumulation coincided with the appearance of CODH activity in the culture, suggesting that the 63Ni2+ was accumulating in CODH. The cooC, cooT, and cooJgenes are required for the increased 63Ni2+accumulation observed upon CO exposure because cells containing mutations disrupting any or all of these genes accumulated63Ni2+ like cells unexposed to CO.

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Inability to accumulate Ni in a genus of hyperaccumulators: the paradox of Odontarrhena sibirica (Brassicaceae)

Planta ◽

10.1007/s00425-020-03507-x ◽

2020 ◽

Vol 252 (6) ◽

Author(s):

Isabella Bettarini ◽

Ilaria Colzi ◽

Cristina Gonnelli ◽

Luigia Pazzagli ◽

Roger D. Reeves ◽

...

Keyword(s):

Evolutionary Dynamics ◽

Metal Accumulation ◽

Herbarium Specimens ◽

Ultramafic Soils ◽

Physiological Mechanisms ◽

Unique Case ◽

Ultramafic Soil ◽

Ni Accumulation ◽

Accumulation Ability ◽

Response Traits

Abstract Main conclusion Odontarrhena is a highly diverse genus of Ni-hyperaccumulators. Here, we demonstrate substantial inability to accumulate Ni in the facultative serpentinophyte O. sibirica, which seems a unique case among the numerous species of the genus that grow on ultramafic soils. Abstract Odontarrhena is the most diverse genus of Ni-accumulating plants in W Eurasia, with most taxa growing obligatorily or facultatively on ultramafic soils. A notable exception may be O. sibirica, a facultative serpentinophyte from the E Mediterranean and W Asia in which accumulation ability is still enigmatic. We addressed this issue using observational and experimental methods. Atomic Absorption Analysis of 33 herbarium specimens and plant and soil samples from seven ultramafic and non-ultramafic sites in Greece revealed shoot Ni values always much lower than 1000 µg g−1, non-significant differences between plants from the two soil types and no relationship with soil pH. Only two Turkish specimens from waste mines had shoot Ni concentration > 1000 µg g−1. The reasons for this deviating result remain obscure, but may be associated with inherent peculiarities of the local populations. When cultivated together with congeneric Ni-accumulating species on the same natural ultramafic soil, only O. sibirica was unable to accumulate the metal. Although plant growth was stimulated in hydroponics at relatively low NiSO4 levels (50–150 µM), as typical for hyperaccumulators, Ni-accumulation occurred only at higher concentrations which had a toxic effect. This peculiar combination of Ni-response traits could be the result of a partial evolutionary loss of ability with respect to all other Ni-accumulating congeneric species. For this, O. sibirica could represent a unique model system for further studies on the evolutionary dynamics, physiological mechanisms and genetic control of metal accumulation and homeostasis.

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A simple model for estimating Ni availability and leaf Ni accumulation for the Ni-hyperaccumulator Leptoplax emarginata

Plant and Soil ◽

10.1007/s11104-013-1873-z ◽

2013 ◽

Vol 374 (1-2) ◽

pp. 131-147

Author(s):

D. Coinchelin ◽

D. Stemmelen ◽

F. Bartoli

Keyword(s):

Simple Model ◽

Ni Accumulation

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Effect of major cations (Ca2+, Mg2+, Na+, K+) and anions (SO 42−, Cl−, NO 3−) on Ni accumulation and toxicity in aquatic plant (Lemna minorL.): Implications For Ni risk assessment

Environmental Toxicology and Chemistry ◽

10.1002/etc.2116 ◽

2013 ◽

Vol 32 (4) ◽

pp. 810-821 ◽

Cited By ~ 12

Author(s):

Yamini Gopalapillai ◽

Beverley Hale ◽

Bernard Vigneault

Keyword(s):

Risk Assessment ◽

Aquatic Plant ◽

Major Cations ◽

Ni Accumulation

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Isolation and characterization of Ni mobilizing PGPB from serpentine soils and their potential in promoting plant growth and Ni accumulation by Brassica spp.

Chemosphere ◽

10.1016/j.chemosphere.2009.01.056 ◽

2009 ◽

Vol 75 (6) ◽

pp. 719-725 ◽

Cited By ~ 101

Author(s):

Ying Ma ◽

Mani Rajkumar ◽

Helena Freitas

Keyword(s):

Plant Growth ◽

Serpentine Soils ◽

Isolation And Characterization ◽

Brassica Spp ◽

Ni Accumulation

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Erratic hyperaccumulation of nickel, with particular reference to the Queensland serpentine endemic Pimelea leptospermoides

Australian Journal of Botany ◽

10.1071/bt14195 ◽

2015 ◽

Vol 63 (2) ◽

pp. 119 ◽

Cited By ~ 13

Author(s):

Roger D. Reeves ◽

W. Scott Laidlaw ◽

Augustine Doronila ◽

Alan J. M. Baker ◽

(the late) George N. Batianoff

Keyword(s):

Soil Ph ◽

Geographic Range ◽

Soil Samples ◽

Ultramafic Soils ◽

Metal Concentrations ◽

Total Soil ◽

Wide Range ◽

Soil Metal ◽

Very High ◽

Ni Accumulation

Many hyperaccumulators of nickel (Ni) are endemic to ultramafic soils and always show very high Ni concentrations. Others occur on a variety of substrates but accumulate high Ni from the ultramafic ones. Pimelea leptospermoides is unusual in being an ultramafic endemic that shows a very wide range of Ni concentrations. The present work sought to establish the factors governing the wide variation in Ni uptake by P. leptospermoides, and aimed to investigate the likelihood of this variation originating from plant differences or soil differences. Multiple paired plant and soil samples were taken over the geographic range of occurrence of P. leptospermoides. Plant and soil metal concentrations and soil pH were measured. No evidence was found to suggest that the plants belong to populations with inherent ‘high-Ni’ and ‘low-Ni’ accumulation capability. Instead, the soil pH (covering a range from 6.0 to 8.3) and the total soil Ni concentrations of the ultramafic soils were found to be the major influences on the level of Ni accumulation. The wide variation observed in Ni accumulation by P. leptospermoides from ultramafic soils can be explained by a combination of variations in soil pH and total soil Ni concentrations.

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Effect of pH and environmental ligands on accumulation and toxicity of Ni2+ to Lemna minor

Environmental Chemistry ◽

10.1071/en12078 ◽

2012 ◽

Vol 9 (6) ◽

pp. 547 ◽

Cited By ~ 1

Author(s):

Yamini Gopalapillai ◽

Bernard Vigneault ◽

Beverley Hale

Keyword(s):

Risk Assessment ◽

Aquatic Plants ◽

Natural Waters ◽

Competitive Inhibition ◽

Lemna Minor ◽

Organic Ligands ◽

Type Model ◽

Effect Of Ph ◽

Tissue Residue ◽

Ni Accumulation

Environmental context Predicting metal toxicity is an important tool for effective and efficient risk assessment and regulation of metal pollution in the environment. The present study aims to provide scientific support for the development of a predictive Ni toxicity model for aquatic plants that is particularly applicable to mining-affected natural waters. We show that the effects of pH and natural organic ligands on Ni accumulation and toxicity can be modelled, but further research is required to understand the effects of flotation ligands used in the mining industry. Abstract Effects of water chemistry and metal speciation on metal uptake and toxicity to aquatic plants such as Lemna minor are not fully understood. The present study examined the effect of pH and environmental ligands (dissolved organic carbon (DOC) and mining related flotation ligands diethylenetriamine (DETA), triethylenetetramine (TETA), sodium isopropyl xanthate), on Ni toxicity to L. minor. Exposure and tissue residue toxicity thresholds were assessed to validate the use of a Biotic Ligand Model (BLM) or a Tissue Residue Approach (TRA) as a framework for predicting Ni toxicity. An increase in the activity of H+ non-linearly decreased the toxicity of free Ni ion activity, whereas Ni accumulation kinetics indicated that the mechanism of Ni2+ and H+ interaction was not competitive inhibition as expected by the BLM framework. The effect of DOC on the toxicity of total Ni concentration was relatively small (toxicity decreased by less than a factor of 2) and was explained solely by the complexation of Ni2+ by DOC. Alternatively, the protective effect of flotation ligands (DETA and TETA) was much less than expected based on estimated Ni complexation. Overall, a TRA model was directly applicable in the presence of organic ligands but not to varying pH, whereas a BLM-type model was applicable with changes in pH and DOC but not in the presence of the lesser studied flotation ligands. Such mechanistic information is essential for the development of reliable Ni toxicity models that would aid in risk assessment and regulation of Ni in the environment, particularly in mining-affected regions.

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