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. 2020 May 7;11:480. doi: 10.3389/fpls.2020.00480

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Copyright © 2020 Stewart, Adams, Escobar, López-Pozo and Demmig-Adams.

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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Relationship between the efficiency of open photosystem II (PSII) centers, F_v/F_m, and zeaxanthin content (as a fraction of the total xanthophyll cycle pool, violaxanthin [V], antheraxanthin [A], and zeaxanthin [Z]) in samples collected either immediately (circles) or after a recovery period of 30 min under a low PPFD of 10 μmol m^–2 s^–1 (squares) subsequent to removal from growth PPFDs. F_m, maximal fluorescence in the dark; F_v, variable fluorescence in the dark (F_m – minimal fluorescence in the dark, F_o). Mean values ± standard deviations, n = 3; analyzed statistically via linear regression.