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. 2019 Dec 6;10:1563. doi: 10.3389/fpls.2019.01563

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Copyright © 2019 Chen, Li, Yang, Zhang, Zou, Bian and Wen

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 UVA on maximum quantum efficiency of photosystem II photochemistry (F_v/F_m) of lettuce leaves. Error bars show ± SE (n = 5). Letters show statistically significant differences (P < 0.05).