Alleviating Effect of Calcium on Nickel Toxicity in Rice

Aziz, Humera; Ṣābir, Muḥammad; Ahmad, Hamaad Raza; Aziz, Tariq; Rehman, Muhammad Zia ur; Hakeem, Khalid Rehman; Öztürk, Münir

doi:10.1002/clen.201400085

Cited by 59 publications

(34 citation statements)

References 55 publications

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“…Therefore, it is possible that exchangeable Ca can compete with metals in plants from site 1. The competition between Ca and metals was observed by other authors (Li et al 2009;Wang et al 2010;Yusuf et al 2011;Lago-Vila et al 2015;Aziz et al 2015). For example, Li et al (2009) andLago-Vila et al (2015) suggested that exchangeable Ca can decrease Ni and Co accumulation by plants because of competition for binding sites in root cells.…”

Section: Accumulation Of Metals By Plantsmentioning

confidence: 60%

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Rock-type control of Ni, Cr, and Co phytoavailability in ultramafic soils

et al. 2017

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Background and aims Ultramafic soils constitute an extreme environment for plants because of specific physico-chemical properties and the presence of Ni, Cr, and Co. We hypothesized that type of ultramafic parent rock depending on their origin affects the composition of soils and plants. Therefore, phytoavailability of metals would be higher in soil derived from serpentinized peridotite compared to serpentinite because of differences in susceptibility of minerals to weathering. Results Based on DTPA-CaCl 2 extractions, we noted that soil derived from the serpentinized peridotite is characterized by a higher phytoavailability of Ni compared to soil derived from the serpentinite. On the contrary, plant species growing on soil derived from the serpentinite contain higher concentrations of metals. Conclusions Our study suggests that the metal uptake by plants is controlled by the mineral composition of parent rocks, which results from both their original magmatic composition and later metamorphic processes. Chemical extractions show that the phytoavailability of Ni and Co is higher in soil derived from the serpentinized peridotite than the serpentinite. Surprisingly, plants growing on the soil derived from the serpentinite contain higher levels of metals compared to these from the serpentinized peridotite derived soil. This contrasting behavior is due to higher abundances of Ca and Mg, not only Ni and Co, in soil derived from the serpentinized peridotite as compared to those in the soil derived from the serpentinite. Calcium and Mg are favored by plants and preferably fill the available sites, resulting in low Ni and Co intake despite their higher abundances.

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Section: Accumulation Of Metals By Plantsmentioning

confidence: 60%

“…Consequently, activity of metals was lower and toxicity was alleviated. Aziz et al (2015) used rice for studying interactions between Ca and Ni. The presence of Ca in tested soils caused decrease in Ni content in plants due to improvement metabolic functions of cell membrane and maintaining its integrity.…”

Section: Accumulation Of Metals By Plantsmentioning

confidence: 99%

Rock-type control of Ni, Cr, and Co phytoavailability in ultramafic soils

et al. 2017

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“…Studies on the contamination of Ni in soils and plants have so far been restricted to highly industrialized temperate regions (AlHamdan and Reddy, 2006). Ni adversely affects plant growth by altering different physiological and metabolic processes (Aziz et al, 2015). So the accumulation of these metals in soil may cause the environmental pollution to a great extent.…”

Section: Introductionmentioning

confidence: 99%

Bioavailability of cadmium and nickel to Daucus carota L. and Corchorus olitorius L. treated by compost and microorganisms

Ahmed¹,

Mazen²,

Nafady³

et al. 2017

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“…Although the role of Ca in increasing metal (including Ni) tolerance has previously been documented (Chaney et al 2008;Siddiqui et al 2011;Aziz et al 2015), the exact mechanisms involved in minimizing toxicity are not always elaborated. Further, there is limited work to date examining the role of CAX1 in serpentine tolerance, including in the tolerance of Ni.…”

Section: Discussionmentioning

confidence: 99%

“…The importance of Ca in alleviating metal toxicity is also known (Aziz et al 2015). Calcium is an essential nutrient for plant growth, development, and metabo- lism, regulating the function of proteins and membrane transport systems as well as gene expression (Bush 1995;White and Broadley 2003;Hepler 2005).…”

Section: Introductionmentioning

confidence: 99%

Inducing Ni sensitivity in the Ni hyperaccumulator plant Alyssum inflatum Nyárády (Brassicaceae) by transforming with CAX1, a vacuolar membrane calcium transporter

Ghasemi

Sharifi

et al. 2018

Ecological Research

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The importance of calcium in nickel tolerance was studied in the nickel hyperaccumulator plant Alyssum inflatum by gene transformation of CAX1, a vacuolar membrane transporter that reduces cytosolic calcium. CAX1 from Arabidopsis thaliana with a CaMV35S promoter accompanying a kanamycin resistance gene was transferred into A. inflatum using Agrobacterium tumefaciens. Transformed calli were sub‐cultured three times on kanamycin‐rich media and transformation was confirmed by PCR using a specific primer for CAX1. At least 10 callus lines were used as a pool of transformed material. Both transformed and untransformed calli were treated with varying concentrations of either calcium (1–15 mM) or nickel (0–500 µM) to compare their responses to those ions. Increased external calcium generally led to increased callus biomass, however, the increase was greater for untransformed callus. Further, increased external calcium led to increased callus calcium concentrations. Transformed callus was less nickel tolerant than untransformed callus: under increasing nickel concentrations callus relative growth rate was significantly less for transformed callus. Transformed callus also contained significantly less nickel than untransformed callus when exposed to the highest external nickel concentration (200 µM). We suggest that transformation with CAX1 decreased cytosolic calcium and resulted in decreased nickel tolerance. This in turn suggests that, at low cytosolic calcium concentrations, other nickel tolerance mechanisms (e.g., complexation and vacuolar sequestration) are insufficient for nickel tolerance. We propose that high cytosolic calcium is an important mechanism that results in nickel tolerance by nickel hyperaccumulator plants.

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Alleviating Effect of Calcium on Nickel Toxicity in Rice

Cited by 59 publications

References 55 publications

Rock-type control of Ni, Cr, and Co phytoavailability in ultramafic soils

Rock-type control of Ni, Cr, and Co phytoavailability in ultramafic soils

Bioavailability of cadmium and nickel to Daucus carota L. and Corchorus olitorius L. treated by compost and microorganisms

Inducing Ni sensitivity in the Ni hyperaccumulator plant Alyssum inflatum Nyárády (Brassicaceae) by transforming with CAX1, a vacuolar membrane calcium transporter

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