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The effects of nickel exposure on physiological functioning of mustard greens and mustard spinach

Boer, J. de (2015) The effects of nickel exposure on physiological functioning of mustard greens and mustard spinach. Master's Thesis / Essay, Biology.

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Abstract

Nickel (Ni) is a plant nutrient, which plays a role in small amounts in, for example, urease. The impact of elevated Ni2+¬ concentrations (1-10 µM) in the root environment on physiological functioning of mustard greens (Brassica juncea) and mustard spinach (Brassica rapa) was studied. The enhanced levels of Ni2+ became swiftly phytotoxic (≥ 5 µM) and resulted in decreased biomass production, an increased pigment concentration, a higher fluorescence level and increased leaf chlorosis. The effect on mustard greens and mustard spinach was similar with only small differences in the size of the effect. The nitrate and sulfate concentrations in both shoot and root for B. rapa and B. juncea were decreased for increasing Ni2+ concentrations. In comparison with previous research on copper and zinc, the most similar effects on nitrate and sulfate concentrations can be found in nickel and zinc, especially in the root. The water-soluble non-protein thiol content of the root and shoot were increased in both species, with the exception of the water-soluble non-protein thiol content in the root of B. juncea at 10 µM Ni2+.

Item Type: Thesis (Master's Thesis / Essay)
Degree programme: Biology
Thesis type: Master's Thesis / Essay
Language: English
Date Deposited: 15 Feb 2018 08:09
Last Modified: 15 Feb 2018 08:09
URI: http://fse.studenttheses.ub.rug.nl/id/eprint/13503

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