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. 2020 Aug 20;11:1287. doi: 10.3389/fpls.2020.01287

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Copyright © 2020 Massana-Codina, Schnee, Allard, Rutz, Boccard, Michellod, Cléroux, Schürch, Gindro and Wolfender

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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Phellem thickness and suberin concentration of five potato cultivars with different quantitative resistance to black dot. (A) Phellem thickness (µm) measured in semithin sections of asymptomatic regions of a potato tuber grown in the field of five cultivars (n=12, mean ± Standard Deviation). (B) Total suberin amounts (µg/mg periderm) of five potato cultivars grown under controlled conditions in the absence of the fungal pathogen (n=6). Statistically significant differences in phellem thickness or suberin load are indicated by different letters (p < 0.01, Fisher’s LSD). In all graphs, black dot severity is shown in a red line and its axis on the right.