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. 2019 Apr 16;10:490. doi: 10.3389/fpls.2019.00490

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Copyright © 2019 Lu, Yu, Li, Chai and Jiang.

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 exogenous GR24 on intersystem energy distribution and electron transport rate (ETR) of tomato seedlings under LL stress. Y(II), effective quantum yield of PSII (A); Y(NO), fraction of energy that is passively dissipated in form of heat and fluorescence (B); Y(NPQ), fraction of energy dissipated in form of heat via the regulated non-photochemical quenching mechanism (C); ETR(II), ETR of PSII (D); Y(I), effective quantum yield of PSI (E); Y(ND), fraction of overall P700 that is oxidized in a given state (F); Y(NA), fraction of overall P700 that cannot be oxidized in a given state (G); ETR(I), ETR of PS I (H). ^∗ and ^∗∗ indicate statistically significant differences at P ≤ 0.05 and P ≤ 0.01, respectively. Multiple comparisons between the figures among the treatments under LL are shown in parentheses.