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. 2016 Aug 12;17:625. doi: 10.1186/s12864-016-2990-x

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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. 5 — Tissue-specific transcription profile of genes involved in the ethylene pathway differentially expressed in epidermis + cortex (EC) and stele (S) of roots of 24-day-old AtHMA4-expressing plants (lines 4 and 15) and in the wild-type (WT). Normalized fold gene expression in epidermis + cortex (EC) and stele (S) from roots of plants grown in the presence of 5 μM Zn for 2 weeks (a; d); under control conditions (b; e) and in the presence of 1 μM Cd for 11 days (c; f). Values correspond to means ± SD (n = 3); those significantly different from the WT (Student’s t-test) are indicated by an asterisk (P ≤ 0.05)