Occurrence, physiological responses and toxicity of …
Of particular concern is the increasing concentration of Ni deposited in agricultural soils by airborne Ni particles. The primary sources of Ni emissions into the …
(PDF) Nickel, Iron and Their Diverse Role in Plants: A Review
concentration, nickel enhances the growth and yield of plants and is essential for the biosynthesis of anthocyanin's Ragsdale (2011), Lopez et al . (2011).
Challenges in processing nickel laterite ores by flotation
It should be added that segregation of laterite ores prior the flotation process has shown some improvement in upgrading nickel. The segregation process relies on the addition of calcium chloride or sodium chloride and carbon allowing the formation of nickel and iron chlorides at temperatures between 900 and 1150 °C. Iwasaki et al., (1961) and …
Bioaccumulation of nickel in tomato plants: risks to human …
As a result of this research, it was verified that soils with nickel concentrations close to 70 mg kg −1, which is the limit established by the CONAMA resolution (420/2009), may actually represent an optimum concentration value for the development of tomato plants. It also increases productivity per plant and reduces the …
Root and Shoot Response to Nickel in Hyperaccumulator …
2.1. Evaluation of Root Area, Biomass, and Plant Water Content. The red colour intensity of the leaves shown by the 1% colorimetric dimethylglyoxime test (DMG) test enhances with increasing Ni concentration, suggesting a nickel accumulation in the leaf epidermis for both the hyperaccumulator species starting from 100 mg kg −1 of Ni …
Understanding Nickel Responses in Plants: More Than …
High nickel concentrations are known to inhibit the growth of Arabidopsis primary roots (Schaaf et al., 2006). Here, the authors analyzed more precisely the effect of nickel on …
Nickel hyperaccumulation mechanisms: a review on the …
Background Hyperaccumulator plants are unusual plants that accumulate particular metals or metalloids, such as nickel, zinc, cadmium and arsenic, in their living tissues to concentrations that are hundreds to thousands of times greater than what is normal for most plants. The hyperaccumulation phenomenon is rare (exhibited by less …
Nickel, Ni | SpringerLink
Nickel (chemical symbol Ni) belongs to the group of transition metals. According to the most common definition of heavy metals (based on density), Ni can be considered one of these elements (Duffus 2002).Its concentration in the Earth's crust is not high, 0.008% (IARC 1990).However, significant Ni content is thought to occur in the …
Plants | Free Full-Text | Nickel Toxicity Induced Changes in …
Nickel toxicity has been reported to interfere with the plant water relations, wheat growth, and plant nutrient status . Different plant species and genotypes show variation in survival ability against abiotic stress induced oxidative damage, i.e., malondialdehyde concentration is responsible for their tolerance against these stresses …
Understanding Nickel Responses in Plants: More …
Nickel enters plant cells via metal transporters, including IRT1-related proteins. High nickel concentration competes with iron in cells. Nickel also induces an …
Nickel: An Overview of Uptake, Essentiality and …
During the last decades, Ni has become a serious concern as its concentration has reached up to 26,000 ppm in polluted soils (Alloway 1995; McGrath …
Nickel: An Overview of Uptake, Essentiality and Toxicity in Plants
The uptake of Ni in plants is mainly carried out through the root system via passive diffusion and active transport (Seregin and Kozhevnikova 2006).The ratio of uptake between active and passive transport varies with the species, form of Ni and concentration in the soil or nutrient solution (Dan et al. 2002; Vogel-Mikus et al. 2005).The overall …
Nickel in plant growth and metabolism | Semantic Scholar
Nickel is not absolutely required for the normal growth and development of plants and, therefore, can not be ranked under the "essential elements". SummaryThe relationship of nickel to plants in regard to absorption, translocation and accumulation and its estimation in plant material has been presented. Nickel is usually absorbed in the ionic form, but is …
Biomonitoring of Urinary Nickel Successfully Protects …
1. Introduction. Nickel is a transition metal element with the chemical symbol Ni and atomic number of 28. It is the fifth most common metal element on Earth, and in nature, most nickel compounds exist in the form of oxides, sulfides, and silicates [].Nickel is a shining silver-white metal that is hard but very malleable and combines easily with …
Nickel Toxicity Induced Changes in Nutrient …
The worldwide average concentration of Ni in natural soils is 22 mg kg −1 [ 8, 9] and has been reported up to 26.4 g kg −1 in soil and 0.3 mg L −1 in water [ 10, 11 ]. …
Plant Responses to Environmental Nickel Toxicity
The usual concentrations of Ni in seawater, marine open waters, Atlantic Ocean, freshwaters, rainwater, groundwater, and tap water have been recently …
Nickel; whether toxic or essential for plants and …
Plant growth and physiology. Nickel is an essential micronutrient and plays significant role in seedling growth and development. It is required in very small …
Essentiality of nickel in plants: a role in plant stresses
The essentiality of nickel as a micronutrient in plants has been established because it is part of the active site of the enzyme urease, which hydrolyzes urea in plant tissues ( Polacco, 1977; Eskew et al., 1983, 1984 ). Two forms of urease are present in plants, one found in seeds and another found in vegetative tissues (ubiquitous).
Nickel: Human Health and Environmental Toxicology
Subsequent chemical analyses of the plant tissues revealed foliar nickel concentrations varying from 7168 to 18,388 mg/kg on a dry weight basis. The data are based on six sets of plant tissue samples of Rinorea niccolifera collected from two sites of Luzon Island (Zambales Province, Municipalities of Santa Cruz and Candelaria, …
Ferti-Facts: Nickel
Nickel concentrations in leaves of plants range between 0.05 to 5 mg/kg dry weight. However, nickel concentrations between 0.1 to 10 mg/kg dry weight are adequate for most plants. Different plant tissues as well as certain plants are considered Ni accumulators. Accumulators are able to tolerate higher soil Ni concentrations and …
Nickel (Ni) phytotoxicity and detoxification …
A high concentration of Ni inhibits root architecture and development in plant species, i.e., Leptoplax emarginata and Eucalyptus urophylla. The root tip is the principal …
Nickel toxicity in plants: reasons, toxic effects, tolerance
Nickel (Ni) is a naturally occurring metal, but anthropogenic activities such as industrialization, use of fertilizers, chemicals, and sewage sludge have increased its concentration in the environment up to undesirable levels. Ni is considered to be essential for plant growth at low concentration; however, Ni pollution is increasing in the …
Role of nickel in regulation of nitrogen metabolism in …
Some researchers suggested that Ni facilitates normal growth processes in minimal concentrations (0.01 to 5 μg g −1 of plant dry weight) while its amount in plants may vary from 0.05 to 5 mg kg −1 dry weight. However, an excess of Ni in soil affects various cellular and metabolic processes in plants, causing a reduction in seed …
Effect of variation in Nickel concentration on Growth of Maize plant…
Nickel is essential element in low concentration for maize plant growth while at high concentration it is toxic. The level of nickel toxicity on root, shoot length and dry biomass of maize was studied, compared to control. A pot (60days) and solution culture experiment (20 days) were conducted to study the effect of nickel concentration on maize plants. …
Effect of nickel concentration and soil pH on metal
Ultramafic soils developed from weathering of ultramafic bedrock and are characterised by relatively high concentrations of magnesium (Mg), iron (Fe), manganese (Mn), nickel (Ni), chromium (Cr) and cobalt (Co), and deficient concentrations of essential macronutrients (N, P and K) and micronutrients (Mo and B) (Echevarria …
The relationship between plasma nickel concentrations and …
Background: Nickel is considered an essential nutrient for certain microbial, plant, and animal species, but its role in human health remains controversial. Some studies have reported the relationship between nickel and type 2 diabetes mellitus (T2DM), but the results are not consistent and the mechanism is not clear, which needs further exploration.
MANGANESE AND NICKEL CONCENTRATIONS IN SOIL AND PLANTS …
Semantic Scholar extracted view of "MANGANESE AND NICKEL CONCENTRATIONS IN SOIL AND PLANTS IN ESFAHAN STEEL COMPANY REGION" by M. Houdaji et al. Skip to search form Skip to main content Skip to account menu. Semantic Scholar's Logo. Search 217,795,588 papers from all fields of science. Search ...
Bioaccumulation of nickel in tomato plants: risks to human …
The experiment was carried out in greenhouse environment for a period of 120 days, and the plants were cultivated in soils with four different concentrations of Ni: 0, 35, 70, and 105 mg kg-1. The concentration of nickel in each part (root, stem, leaf, and fruit) of the tomato plant was measured at four different stages of the cycle: 30, 60, 90 ...
Physiological role, toxicity, hyperaccumulation, and tolerance …
Using the radiolabled nickel (63 Ni), Cataldo et al. (1978) found that after absorption of radioactive Ni from the soil, it accumulated in different parts of the plant and the maximum concentration was observed in the leaves of soybean at the vegetative stage. However, after seed formation, maximum amount of the metal was noticed in the …
Essential roles and hazardous effects of nickel in plants
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.
