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. 2018 Apr 9;54(3):332–340. doi: 10.1007/s11627-018-9900-7

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© The Author(s) 2018

Open Access This 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.

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Figure 2. — Experimental 3-wk-old agitated in vitro cultures of Hypericum perforatum cultivar ‘Topas’ on LS medium (Linsmaier and Skoog 1965) and cultivar ‘Helos’ on MS medium (Murashige and Skoog 1962). Medium variants containing: (a) 0.1/0.1 mg L⁻¹ 6-benzylaminopurine (BAP) and α-naphthaleneacetic acid (NAA); (b) 1.0/1.0 mg L⁻¹ BAP and NAA; (c) 2.0/2.0 mg L⁻¹ BAP and NAA; (d) 3.0/3.0 mg L⁻¹ BAP and NAA.