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. 2017 Mar 30;8:444. doi: 10.3389/fpls.2017.00444

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Copyright © 2017 Abts, Vandenbussche, De Proft and Van de Poel.

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) or licensor 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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Effect of indole-3-acetic acid (IAA) and 1-aminocyclopropane-1-carboxylic acid (ACC) added to the imbibition medium on (A) root length (mm) of sugar beet seedlings after 3, 4, 5, and 6 days at 20°C in darkness. Mean values ± SD are presented (n > 40). A linear models procedure and the Tukey means comparison test was used to check statistical differences between the treatments and days. Levels of significance (p < 0.05) are indicated with the letters a–j. (B) Representative examples of 6 day old sugar beet seedlings incubated at 20°C in darkness in the presence of different 1-aminocyclopropane-1-carboxylic acid (ACC) and/or indole-3-acetic acid (IAA) concentrations.