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. 2019 Sep 16;12:221. doi: 10.1186/s13068-019-1566-9

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© The Author(s) 2019

Open AccessThis article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated.

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Fig. 7 — Analysis of room temperature chlorophyll fluorescence during photosynthesis under EL. a Chlorophyll fluorescence was monitored at 24 °C in dark-adapted cultures. Cell suspensions were illuminated for 20 min and the thermal energy dissipation (NPQ) was determined during steady-state photosynthesis. Symbols and error bars show mean ± SD (n = 4). b PSII repair efficiency was quantified on WT, PG-14 and SOR strains plants by measuring F_v/F_m (PSII photoinhibition) recovery in low light (LL—20 μmol photons m⁻² s⁻¹, 24 °C) after photoinhibitory treatment (HL—1800 μmol photons m⁻² s⁻¹, 24 °C, 3 h) that reduce the F_v/F_m value to ~ 0,3 in all genotypes. Data are expressed as mean ± SD (n = 4)