Effect of arginine pre-treatment on nickel accumulation and alleviation of the oxidative stress in Hyoscyamus niger

Nasibi, Fatemeh; Heidari, Toktam; Asrar, Zahra; Mansoori, H

doi:10.4067/s0718-95162013005000054

Cited by 20 publications

(20 citation statements)

References 30 publications

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“…Thus, role of Arg has come into light due to its multiple metabolic fates. Apart from serving as a constituent of proteins, Arg is a precursor for biosynthesis of other substances like polyamines (PAs), agmatine and Pro, Glu and nitric oxide (NO) those play vital role in metal stress tolerance (Liu et al, 2006 ; Nasibi et al, 2013 ). Arg biosynthesis in plant occurs through ornithine (Orn) which comes from few steps conversion of Glu involving five enzymes (Verma and Zhang, 1999 ).…”

Section: Non-thiol Compounds and Metal(loid)-chelationmentioning

confidence: 99%

Jacks of metal/metalloid chelation trade in plantsâ€”an overview

et al. 2015

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Varied environmental compartments including soils are being contaminated by a myriad toxic metal(loid)s (hereafter termed as “metal/s”) mainly through anthropogenic activities. These metals may contaminate food chain and bring irreparable consequences in human. Plant-based approach (phytoremediation) stands second to none among bioremediation technologies meant for sustainable cleanup of soils/sites with metal-contamination. In turn, the capacity of plants to tolerate potential consequences caused by the extracted/accumulated metals decides the effectiveness and success of phytoremediation system. Chelation is among the potential mechanisms that largely govern metal-tolerance in plant cells by maintaining low concentrations of free metals in cytoplasm. Metal-chelation can be performed by compounds of both thiol origin (such as GSH, glutathione; PCs, phytochelatins; MTs, metallothioneins) and non-thiol origin (such as histidine, nicotianamine, organic acids). This paper presents an appraisal of recent reports on both thiol and non-thiol compounds in an effort to shed light on the significance of these compounds in plant-metal tolerance, as well as to provide scientific clues for the advancement of metal-phytoextraction strategies.

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Section: Non-thiol Compounds and Metal(loid)-chelationmentioning

confidence: 99%

Jacks of metal/metalloid chelation trade in plantsâ€”an overview

et al. 2015

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“…Nasibi et al [61] in their study on Hyocyamus niger found that Ni 2+ showed decrease in chlorophyll a and total chlorophyll which was further maintained/recovered by Arginine pretreatment in Ni 2+ stressed plants. Pietrini et al [62] in a study on Amaranthus paniculatus L. reported that the exposure of plants to increasing Ni 2+ in the growth solution caused a significant increase in free polyamine content in roots and leaves of test plant at 25 µM NiCl 2 , whereas a decrease in the PAs (Spermidine and Spermine) content of plants at higher Ni 2+ concentrations.…”

Section: Physical Barriersmentioning

confidence: 97%

An Overview of Nickel (Ni2+) Essentiality, Toxicity and Tolerance Strategies in Plants

Sachan¹,

Lal²

2017

AJOB

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Heavy metals (HMs) toxicity has an unavoidable threat to environment and public health due to their increasing contamination and accumulation in atmosphere which ultimately passes to the living beings by the route of food chain. Heavy metals are increasing rapidly in soil and water by weathering of rocks and anthropogenic activities and are now emerging as a major health hazard to humans and plants. Among them Nickel (Ni 2+) is a controversial element because of debate on its essentiality or non-essentiality in plants. Ni 2+ is an important constituent (micronutrient) of many metallo-enzymes including urease, Ni-Fe hydrogenase, Ni-superoxide dismutase etc. while at higher level it affects all cellular and metabolic processes and causes retardation of germination, competition with other essential metal ions, osmotic imbalance, alteration of many enzymatic activities, disruption of cell structure and wilting, reduced photosynthetic activity, oxidative stress etc. Plants also possess some natural and stress-induced strategies to cope up with Ni 2+ excess/toxicity. These strategies include growth regulators, antioxidative enzymes, amino acids as osmoprotectant, and chelation of Ni 2+ with metalloproteins and metallothionins. This review focuses on researches done on the morpho-biochemical alterations induced by elevated Ni 2+ concentration in plants and as well as the strategies adapted by plants to survive and neutralize the effects of these alterations.

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“…Asparagine has been linked to glutamine and arginine as the major nitrogen transporters in plants. 36 Asparagine and glutamine are known to be present in high concentrations in seeds of plants and this is reflected in the concentrations present in B. coddii seeds.…”

Section: Amino Acids In B Coddiimentioning

confidence: 99%

Identification of chelidonic acid as the predominant ligand involved in Ni uptake in the hyperaccumulator Berkheya coddii

2016

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Nickel uptake in Berkheya coddii, a Ni hyperaccumulator (>3 % Ni m/m), was studied using plants from serpentine outcrops in Barberton, Mpumalanga Province, South Africa. Size exclusion chromatography (SEC), high resolution mass spectrometry (HR-MS) and high performance liquid chromatography (HPLC) were used to identify and quantify organic and amino acids typically associated with hyperaccumulation. Calculated molar ratios were used to identify potential Ni-ligand associations with amino and organic acids. The former showed no single acid present at levels sufficient to complex adequately with the high levels of Ni in B. coddii. Only elevated proline concentrations in younger B. coddii leaves were recorded; however, proline may be produced as a stress response to elevated metal concentrations. A combination of chromatography and spectroscopy led to the identification of chelidonic acid as the ligand playing a significant role in Ni uptake in B. coddii. Chelidonic acid and Ni in leaves were quantified in a 3:1 molar ratio. However, during spiking experiments where soluble Ni was added to soil, the chelidonic acid and Ni concentrations increased to a 6:1 molar ratio. The other amino and organic acids present in the plant showed no response to an increase in soluble Ni, thus indicating chelidonic acid has a role in the B. coddii hyperaccumulation process. This finding is the first to link chelidonic acid to hyperaccumulation and will have significant impact on the potential of B.coddii for phytoremediation. KEYWORDSBerkheya coddii Roessler, hyperaccumulator, Ni uptake, organic acids, amino acids, chelidonic acid.

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Effect of arginine pre-treatment on nickel accumulation and alleviation of the oxidative stress in Hyoscyamus niger

Cited by 20 publications

References 30 publications

Jacks of metal/metalloid chelation trade in plantsâ€”an overview

Jacks of metal/metalloid chelation trade in plantsâ€”an overview

An Overview of Nickel (Ni2+) Essentiality, Toxicity and Tolerance Strategies in Plants

Identification of chelidonic acid as the predominant ligand involved in Ni uptake in the hyperaccumulator Berkheya coddii

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