Macronutrient composition of nickel-treated wheat under different sulfur concentrations in the nutrient solution

Abstract

The effect of different sulfate(VI) sulfur (2, 6, and 9 mM S) levels and nickel(II) chloride (0, 0.0004, 0.04 and 0.08 mM Ni) in the nutrient solution on productivity and macronutrient (N, P, K, Ca, Mg, S) status and accumulation in spring wheat (Triticum aestivum L.) Zebra cv. was studied. Ni treatment reduced the biomass and disturbed the balance and accumulation of macronutrients in wheat. Intensive S nutrition, especially with 6 mM S, at least partially increased the biomass, improved ionic equilibrium, and enhanced nutrient accumulation in Ni-exposed plants in spite of increased Ni accumulation. Admittedly, the dose 9 mM S reduced Ni accumulation in shoots but increased accumulation thereof in roots. Compared to 6 mM, the dose 9 mM was less effective in improving the mineral status of Ni-treated wheat.

Growth of tropical grasses in Oxisol contaminated by nickel

“…Nickel is essential for plants as a constituent of various metalloenzymes, including urease, some superoxide dismutases (SOD), NiFe hydrogenases, methyl coenzyme M reductase, acetyl-coenzyme A synthase, RNAse A, and others. Therefore, Ni deficiency reduces urease activity, changes N assimilation, reduces SOD activity and decreases the elimination of superoxide free radicals (Fabiano et al, 2015;Matraszek et al, 2016). Another important role of Ni in plants is its contribution to phytoalexin synthesis, increasing plant resistance to various types of stress (Ahmad and Ashraf, 2011;Fabiano et al, 2015).…”

“…Levels below the CR indicate deficiency, while the plant exhibits toxicity above the CR. Most plants have a Ni CR between 0.05 and 10 mg kg -1 DM (Chen et al, 2009) with levels higher than 10 mg kg -1 being toxic for most plants (Yusuf et al, 2011;Hussain et al, 2013;Matraszek et al, 2016).…”

“…The toxic Ni concentration in plants varies in relation to the degree of sensitivity or tolerance to the metal in the soil (Matraszek et al, 2016). On the other hand, the descending order of sensitivity or tolerance to Ni in the soil based on the CTD in shoot dry weight (Table 2) was 'Basilisk' > 'Xaraés' > 'Marandu' > 'Tanzania' > 'Aruana'; thus, tropical grasses are considered from sensitive to moderately tolerant to soil Ni (Yusuf et al, 2011;Hussain et al, 2013;Matraszek et al, 2016).…”

“…Although Ni is an essential element for plants (López and Magnitski, 2011;Fabiano et al, 2015), high levels of this metal in the environment can cause phytotoxicity (Kovácik et al, 2009) and even reach the animal and human food chain (Rodak et al, 2015). In general, critical toxicity levels are 10 mg kg -1 DM in sensitive species, 50 mg kg 1 DM in moderately tolerant species, 100 mg kg -1 DM in tolerant species (Yusuf et al, 2011;Hussain et al, 2013;Matraszek et al, 2016), and 1000 mg kg -1 DM in Ni hyperaccumulator plants, such as the Alyssum and Thlaspi species (Yusuf et al, 2011;Leitenmaier and Küpper, 2013;Matraszek et al, 2016).…”

Wheat Straw as a Bio-Sorbent for Arsenate, Chromate, Fluoride, and Nickel

“…Public health issues, phytotoxicity and overall pollution concerns have been related to As(V) [1,2], Cr(VI) [3,4], F [5,6], and Ni [7].…”