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. 2018 Jan 2;18:1. doi: 10.1186/s12870-017-1213-1

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© The Author(s). 2017

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. 8 — Laccase activity in H15 and H20. a to d, H15; e to h, H20. Details of the xylem regions and bast fibres are shown in b and f and d and h, respectively. Orange colour indicates the presence of laccase activity. Blue arrowheads indicate the absence of laccase activity in the lignified primary xylem. i: negative control without DAB in H20. j: negative control with sodium azide as inhibitor of laccase activity in H20. bf1 primary bast fibre, bf2 secondary bast fibre. Scale bar: 100 μm (50 μm in the insets)