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. 2019 Jan 14;9:2002. doi: 10.3389/fpls.2018.02002

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Copyright © 2019 Kaiser, Ouzounis, Giday, Schipper, Heuvelink and Marcelis.

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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Effects of percentage of blue light in supplemental lighting on crop characteristics per plant. (A) number of fruits; (B) leaf area (LA); (C) stem length; and (D) internode length. Final harvest occurred 111 DOT, intermediate harvest 40 DOT. Number of fruits includes periodically picked ripe fruits. Inset in (C): Specific stem length (SSL; stem length/stem dry weight) at final (P_quad = 0.013) and intermediate harvest (P_quad = 0.024). For significant quadratic or linear effects of supplemental blue light, a trendline together with the respective P-value is depicted. Data gathered from three plants per plot were averaged for one value per plot. The treatment average ± SEM was then calculated based on values from two plots per treatment (n = 2).