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. 2018 May 17;9:618. doi: 10.3389/fpls.2018.00618

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Copyright © 2018 Wan, Zhang, Wang, Sun, Wang, Zhou and Xu.

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 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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UV-B radiation influences auxin accumulation and transport via flavonoids. GFP/YFP fluorescence in the roots of 5-d-old DII-VENUS (A), AUX1:YFP (C), and PIN2:GFP (E) seedlings exposed to 1.6 W m^-2 UV-B radiation for 1 h and then transferred to normal growth conditions plus 0 nM QU or 100 nM QU for 4 h. Quantification of DII-VENUS (B), AUX1:YFP (D), and PIN2:GFP (F) fluorescence intensities in the root tips is presented. Bars, 50 μm. White arrows indicate the direction of UV-B-radiation; ck, before UV-B radiation control. The error bars represent the SE, and different letters indicate significantly different values (P < 0.05 by Tukey’s test).