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. 2020 Jan 10;10:1656. doi: 10.3389/fpls.2019.01656

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Copyright © 2020 Paponov, Kechasov, Lacek, Verheul and Paponov

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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The effect of the supplemental light-emitting diode (LED) inter-lighting on photosynthetic light use efficiency (PLUE). Every mean shown is based on 41–72 measurements. Bars represent SE. Stars indicate significant differences at p < 0.05. The experiment was analyzed using two-factor analysis of variance (ANOVA). The first factor is the LED effect (LED) and the second factor is time (T). Analysis of the source of variation (ANOVA) showed that the effect of LED was significant at p < 0.001; time was significant at p < 0.05; and the interaction between LED × T was significant at p < 0.05.