Occurrence, physiological responses and toxicity of nickel in plants

Abstract

The focus of the review is on the specific aspects of nickel's effects on growth, morphology, photosynthesis, mineral nutrition and enzyme activity of plants. The mobility of nickel in the environment and the consequent contamination in soil and water is of great concern. Also, the detrimental effects of excessive nickel on plant growth have been well known for many years. Toxic effects of nickel on plants include alterations in the germination process as well as in the growth of roots, stems and leaves. Total dry matter production and yield was significantly affected by nickel and also causes deleterious effects on plant physiological processes, such as photosynthesis, water relations and mineral nutrition. Nickel strongly influences metabolic reactions in plants and has the ability to generate reactive oxygen species which may cause oxidative stress. More recent evidence indicates that nickel is required in small amounts for normal plant growth and development. Hence, with the increasing level of nickel pollution in the environment, it is essential to understand the functional roles and toxic effects of nickel in plants.

Uptake, assimilation and toxicity of cyanogenic compounds in plants: facts and fiction

“…The similar shortcoming of time-consuming also arises in bioremediation of free cyanide. Phytoremediation, in contrast to other biology-based methods, has received considerable attention in remediating sites polluted with low to moderate levels of contamination (Akguc et al 2010;Cheng et al 2011;Ling et al 2011;Dubey and Shiwani 2012;Sreekanth et al 2013). As a natural, pumpand-treat system, phytoremediation is one of the very few technologies that can address a diverse range of media and contaminants simultaneously (Kord et al 2010;Ashraf et al 2011;Hegazy et al 2011;Dede et al 2012;Parween et al 2012;Karimi et al 2013).…”

Nickel dynamics influenced by municipal solid waste compost application in tea (Camellia sinensis L.): a cup that cheers

“…Excess Ni has been shown to cause a substantial decrease in all macroand micronutrients in leaves of different plants. Sreekanth et al (2013) also reported that for higher plants, Ni strongly influences metabolic reactions and has the capability to form reactive oxygen species which may cause oxidative stress. However, there is no information available for Ni in tea plant.…”

“…Toxic levels of Ni in plants range from 8 to 147 mg kg -1 (Gupta et al 2008) even though Ni is an essential micronutrient at very low contents (\50 lg g -1 in the plant tissue) for plant growth (Gupta et al 2008). The essentiality of Ni in plant is established by the documentation of various Ni deficiency symptoms as well as its physiological functions and critical roles in various enzymes in plants (Sreekanth et al 2013). Besides several beneficial roles of Ni in plant, it has been documented that Ni toxicity of plant grown in soil amended with large quantities of wastes, e.g., sewage and sludge (Gupta et al 2008).…”

“…Besides several beneficial roles of Ni in plant, it has been documented that Ni toxicity of plant grown in soil amended with large quantities of wastes, e.g., sewage and sludge (Gupta et al 2008). The symptoms of Ni toxicity reported in plants are the inhibition of growth, chlorosis, necrosis and wilting (Sreekanth et al 2013). High concentrations of Ni may contribute to deficiency of nutrients particularly divalent cations that come in competition with Ni.…”

Evaluacion del uso de residuos organicos para la produccion de biochar y su aplicacion como enmienda organica

“…Fabiano et al, 2015). Su presencia en altas concentraciones inhibe el crecimiento de las plantas y puede llegar a producir clorosis 8 y necrosis (Sreekanth et al, 2013).…”