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. 2014 Dec 16;81(2):233–246. doi: 10.1111/tpj.12722

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© 2014 The Authors The Plant Journal published by Society for Experimental Biology and John Wiley & Sons Ltd.

This is an open access article under the terms of the Creative Commons Attribution-NonCommercial-NoDerivs License, which permits use and distribution in any medium, provided the original work is properly cited, the use is non-commercial and no modifications or adaptations are made.

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Enzyme activity of NADH- and NADPH-dependent nitrate reductases. Enzyme activities were determined in shoots of seedlings in different treatments. DMA or EDTA was added to medium to a final concentration of 30 μm, no chelators were added to control. Assays were performed separately to measure NADH- and NADPH-dependent NR activities. Asterisks indicate significant difference to control (no DMA) under each pH (*P < 0.05; **P < 0.01; Student's t-test). Values shown are mean ± standard deviation (SD) (n = 3).