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. 2015 Aug 11;6:621. doi: 10.3389/fpls.2015.00621

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Copyright © 2015 Huang, Hu and Zhang.

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) or licensor 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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Responses of coefficient of PSII photochemical quenching (qP) (A), maximum quantum yield of PSII after light-adaptation (F_v′/F_m′) (B), and effective quantum yield of PSII (Φ_PSII) (C) to fluctuating light levels (closed symbols) or constant bright light (open symbols). Treatment protocol followed that described for Figure 2. Measurements were conducted at 25°C and 400 μmol mol⁻¹ CO₂. Values are means ± SE (n = 4).