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. 2022 Nov 25;13:981581. doi: 10.3389/fpls.2022.981581

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Copyright © 2022 Daems, Ceusters, Valcke and Ceusters

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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Maximum quantum efficiency of PSII (F_v/F_m) (A) and performance index (PI_abs) (B) measured at 08.00 h in young fully expanded leaves of Phalaenopsis ‘Edessa’ at 0 (control), 1, 8, 15 and 22 days after exposure to chilling conditions (10°C). Data are means ± SE (n = 15 plants). Values were compared among the different time points according to Tukey’s HSD test at p < 0.05 marked by different letters.