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. 2022 Dec 28;12:22486. doi: 10.1038/s41598-022-26869-6

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© The Author(s) 2022

Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/.

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The drought to control percentage ratio (D/C) of chlorophyll a fluorescence kinetic parameters (F_v/F_m, Area, PI, ABS/CS_m, TR_o/CS_m, ET_o/CS_m, DI_o/CS_m, RC/CS_m) in glaucous (811, L35, RXL10) and non-glaucous (811bw, L35bw, RXL10bw) near-isogenic rye lines. The grey line states for 100% of each line (control), D/C was calculated from the following formula: %CD/C = (D/C) × 100%, where C is the average value of the CF parameter for a given line in control conditions, D is the average value of the CF parameter for a given line under drought condition. The statistically significant differences between the means in control and drought were verified for P ≤ 0.001(***), P ≤ 0.01(**), P ≤ 0.05(*) according to Student’s test. ns not significant, F_v/F_m the maximum photochemical efficiency of photosystem II (PSII), Area the size of the electron acceptor field of PSII, PI the overall performance index of PSII, ABS/CS_m the photon flux absorbed by antenna dye molecules, TR_o/CS_m the excitation energy trapped in PSII reaction centers, ET_o/CS_m the electron transport rate by PSII, DI_o/CS_m the energy dissipated from PSII, RC/CS_m the density of active reaction centers.