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. 2019 Nov 20;20:877. doi: 10.1186/s12864-019-6152-9

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© The Author(s). 2019

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. 3 — Effects of Cd stress on external morphology and active oxygen metabolism in Verbena bonariensis. a The comparison of vitro morphology of plants from CK and Cd treated. b The comparison of ROS staining of leaves from control and Cd-treated Verbena bonariensis plants. c The indexes of morphological characteristics. Plants were grown with 100 mg/kg Cd for 20 d