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. 2016 Nov 9;16:247. doi: 10.1186/s12870-016-0940-z

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© The Author(s). 2016

Open AccessThis article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated.

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Fig. 4 — Organ-specific impact of drought stress on cysteine biosynthesis in maize. a-d Extractable enzymatic activities of serine acetyltransferase (a, b, SERAT) and O-acetylserine(thiol)lyase (c, d, OASTL) from leaves (a, c) and roots (c, d) of control (black) and drought-stressed plants (white). e-h Steady state levels of the cysteine precursors OAS (e, f) and sulfide (g, h) in leaves (e, g) and roots (f, h) of maize plants suffering from water restriction. Data are means ± SD of five to seven individual replicates. Asterisks indicates statistical differences as determined by the unpaired t-test (*, 0.05 ≥ p > 0.01; **, 0.01 ≥ p > 0.001; ***, p ≤ 0.001)