Biological effects of nickel species and their determination in plant and soil

Willaert, Guido A.; Verloo, Marc

doi:10.1007/bf02370559

Cited by 19 publications

(6 citation statements)

References 13 publications

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“…This may result from the fact that the Brockman soil has a slightly higher soil pH level and higher content of organic matter and Fe/Mn oxides (Table 1). The availability of Ni in soil increases as soil pH decreases, and organic matter and Fe/Mn oxides could influence Ni availability (Willaert & Verloo, 1988; Weng et al ., 2001).…”

Section: Resultsmentioning

confidence: 99%

Do high‐nickel leaves shed by the nickel hyperaccumulator Alyssum murale inhibit seed germination of competing plants?

Zhang

Angle

Chaney³

2006

New Phytologist

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Summary• Elemental allelopathy suggests that nickel (Ni)-rich leaves shed by hyperaccumulators inhibit the germination and growth of nearby plant species.• Here, the germination of eight herbaceous species following addition of Alyssum murale biomass or Ni(NO 3 ) 2 , with the same Ni level added to soil, was assessed. The distribution of Ni in soil was tested by determining Ni phytoavailability and speciation over time.• Phytoavailable Ni in soil amended with biomass declined rapidly over time due to Ni binding to iron (Fe)/manganese (Mn) oxides in the soil. No significant effects on seed germination were observed. Unlike the Ni complex in Alyssum biomass, more Ni remained soluble and phytoavailable in soil amended with Ni(NO 3 ) 2 , thus significantly inhibiting seed germination.• High-Ni leaves shed by hyperaccumulators did not appear to create a 'toxic zone' around the plants and inhibit germination or growth of competing plants. The lack of an allelopathic effect was probably related to low Ni availability.

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Section: Resultsmentioning

confidence: 99%

Do high‐nickel leaves shed by the nickel hyperaccumulator Alyssum murale inhibit seed germination of competing plants?

Zhang

Angle

Chaney³

2006

New Phytologist

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“…Nickel is present in an exchangeable form when bound to organic matter and can, therefore, be easily exchanged with the crystal lattice of minerals in the soil solid phase (Misra and Pande 1974;Karaca 2004;Sukkariyah et al 2005). Although Ni solubility in soils increases with soil acidity, high Ni mobility may also occur under neutral or alkaline conditions (Willaert and Verloo 1988;Alloway 1995). Generally, mobile forms of nickel are readily available for uptake and most of the nickel ion absorbed by plants accumulates primarily in roots.…”

Section: Nickel Availability and Uptakementioning

confidence: 99%

Essential Roles and Hazardous Effects of Nickel in Plants

Ahmad

Ashraf²

2011

Reviews of Environmental Contamination and Toxicology

142

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With the world's ever increasing human population, the issues related to environmental degradation of toxicant chemicals are becoming more serious. Humans have accelerated the emission to the environment of many organic and inorganic pollutants such as pesticides, salts, petroleum products, acids, heavy metals, etc. Among different environmental heavy-metal pollutants, Ni has gained considerable attention in recent years, because of its rapidly increasing concentrations in soil, air, and water in different parts of the world. The main mechanisms by which Ni is taken up by plants are passive diffusion and active transport. Soluble Ni compounds are preferably absorbed by plants passively, through a cation transport system; chelated Ni compounds are taken up through secondary, active-transport-mediated means, using transport proteins such as permeases. Insoluble Ni compounds primarily enter plant root cells through endocytosis. Once absorbed by roots, Ni is easily transported to shoots via the xylem through the transpiration stream and can accumulate in neonatal parts such as buds, fruits, and seeds. The Ni transport and retranslocation processes are strongly regulated by metal-ligand complexes (such as nicotianamine, histidine, and organic acids) and by some proteins that specifically bind and transport Ni. Nickel, in low concentrations, fulfills a variety of essential roles in plants, bacteria, and fungi. Therefore, Ni deficiency produces an array of effects on growth and metabolism of plants, including reduced growth, and induction of senescence, leaf and meristem chlorosis, alterations in N metabolism, and reduced Fe uptake. In addition, Ni is a constituent of several metallo-enzymes such as urease, superoxide dismutase, NiFe hydrogenases, methyl coenzyme M reductase, carbon monoxide dehydrogenase, acetyl coenzyme-A synthase, hydrogenases, and RNase-A. Therefore, Ni deficiencies in plants reduce urease activity, disturb N assimilation, and reduce scavenging of superoxide free radical. In bacteria, Ni participates in several important metabolic reactions such as hydrogen metabolism, methane biogenesis, and acetogenesis. Although Ni is metabolically important in plants, it is toxic to most plant species when present at excessive amounts in soil and in nutrient solution. High Ni concentrations in growth media severely retards seed germinability of many crops. This effect of Ni is a direct one on the activities of amylases, proteases, and ribonucleases, thereby affecting the digestion and mobilization of food reserves in germinating seeds. At vegetative stages, high Ni concentrations retard shoot and root growth, affect branching development, deform various plant parts, produce abnormal flower shape, decrease biomass production, induce leaf spotting, disturb mitotic root tips, and produce Fe deficiency that leads to chlorosis and foliar necrosis. Additionally, excess Ni also affects nutrient absorption by roots, impairs plant metabolism, inhibits photosynthesis and transpiration, and causes ultrastructural modificat...

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“…Because the stability constant of DTPA is higher than of naturally occurring ligands such as organic acids (Cline et al, 1982) in the soil solutions used in the present study, the amount of available chelating ligands for Ni must be fairly high (Martell and Smith, 1974). In contrast to nutrient solutions, in soils higher concentrations of either synthetic chelators such as DTPA (Wallace, 1980) or naturally occurring ligands (indicated by the DOC content) increase the concentration and mobility of Ni in soil solution, and this may also increase the Ni uptake by plants (Wallace, 1980;Willaert and Verloo, 1988).…”

Section: Discussionmentioning

confidence: 99%

“…Whether or not the higher concentrations of chelated heavy metals in the soil solution increase Ni uptake by soil-grown plants depends on various factors, such as thermodynamic chelate stability (Willaert and Verloo, 1988), charge, and molecular-size fraction of the bound metal complex. The cell wall matrix of roots is negatively charged and exerts a repulsive effect on negatively-charged species in the surrounding solution.…”

Section: Discussionmentioning

confidence: 99%

Speciation analysis of nickel in soil solutions and availability to oat plants

1991

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Soil solutions were collected for speciation analysis of nickel from a pot experiment with oats. Oat plants (Arena sativa L.) were grown on 3 soils differing in total amount and origin of nickel (Ni) (Luvisol, LS with 28 mgkg-1; sludge amended Luvisol, LS + SS with 32mgkg-1; Cambisol, CS with 95 mg kg-a). Results were compared with those for soil solutions obtained from corresponding unplanted pots. Separation methods were used for characterization of size and charge distribution and stability of the Ni species. In addition, short-term experiments were performed on the uptake rates of Ni by oat plants from the different soil solutions as well as from nutrient solutions with increasing concentrations of a synthetic chelator.The Ni concentrations in the soil solutions of unplanted soils increased in the order: LS < LS + SS < CS. In the Cambisol (CS) the high-molecular-size anionic Ni species (>5000gmo1-1) was the predominant form, whereas in the other soils the low-molecular-size cationic and chelated Ni species (500-1000 g moi -1) dominated in the soil solution. In the short-term uptake studies, the uptake rates of Ni from the solutions decreased in the order: nutrient solution > soil solutions, and in the latter in the order: LS > L S + SS > CS, which was inversely related to the concentrations of dissolved organic carbon in the soil solutions.The results demonstrate that Ni availability to plants is not only affected by total concentration of Ni in the soil solution and the rate of replenishment from the solid phase, but also by Ni species, which can differ considerably between soil types.

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Biological effects of nickel species and their determination in plant and soil

Cited by 19 publications

References 13 publications

Do high‐nickel leaves shed by the nickel hyperaccumulator Alyssum murale inhibit seed germination of competing plants?

Do high‐nickel leaves shed by the nickel hyperaccumulator Alyssum murale inhibit seed germination of competing plants?

Essential Roles and Hazardous Effects of Nickel in Plants

Speciation analysis of nickel in soil solutions and availability to oat plants

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