Effects of Nickel Hyperaccumulation on Physiological Characteristics ofAlyssum MuraleGrown on Metal Contaminated Waste Amended Soil

Abstract

A pot experiment was conducted to investigate the effect of nickel concentration on physiological characteristics of Alyssum murale when grown in a soil mixed with sewage sludge (at the rate of 2.8%). Two types of sludge were used: agricultural sewage sludge (S1) and industrial sewage sludge with an increasing nickel concentration (S2, S3, and S4). Results showed that Ni in shoots was higher than Ni in roots. A. murale is able to concentrate up to 12730 mg/kg Ni in leaves. The highest dry matter yield was observed with plants grown with agricultural sewage sludge. An addition of S2 and S3 increased shoot biomass. However, application of S4 reduced 40% shoot dry weight as compared to the control Ni treatment did not affect all chlorophyll fluorescence parameters. The F(v)/F(m) ratio was stable between Ni treatments. Photosynthesis rate (A) increased with agricultural sewage sludge, but remained stable with variable Ni rates from the industrial sludge. The chlorophyll content increased with S1, S2 and S3 but it remains constant with S4 when compared to the control Therefore, high nickel concentration did not affect the function of the photosynthetic machine of A. murale.

Photosynthetic Responses of Tomato Leaves to Salt and Cadmium Stresses: Growth and Chlorophyll a Fluorescence Kinetic Analyses

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24-Epibrassinolide mitigates nickel toxicity in young Eucalyptus urophylla S.T. Blake plants: nutritional, physiological, biochemical, anatomical and morphological responses

“…Ni 2+ in high concentrations can inhibit ZIP/NRAMP transporters linked to uptake of other elements vital to the physiological processes, mainly with Ca, Mg, Fe and Zn(Mizuno et al 2005;Ahmad et al 2007;Deng et al 2016) Sharma et al (2011). described the positive effects of EBR on Raphanus sativus seedlings cultivated under Ni 2+ stress, being detected as improvements linked to root length and a higher efficiency of the antioxidant system in the shoot Sellami et al (2012). investigating the effect of Ni…”

Edaphic Factors as Agents of Genetic Diversity and Adaptation of Native Plant Species of Harsh Environments in the Brazilian Savanna

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