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. 2017 Aug 8;7:7493. doi: 10.1038/s41598-017-07398-z

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© The Author(s) 2017

Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as 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 images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.

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The growth of (a) I. cavalcantei, (b) I. marabaensis, and (c) I. asarifolia on soils collected from Canga N4 (N4 site#1, N4 site#2), S11 Plateau Canga (S11), and horticultural soil (Control). Pictures taken ten weeks after germination. Operculina hamiltonii (d), Merremia aegyptia (e) and Ipomoea grandifolia (f) grown on horticultural soil (C) or Canga soil (N4). Seedlings grown on Canga soil (N4) were retarded, shed leaves that developed necrotic lesions (lower close up images).