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. 2018 Apr 11;13(4):e0195705. doi: 10.1371/journal.pone.0195705

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© 2018 Liefer et al

This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

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Fig 3 — Changes in (A,B,C,D) the effective absorption cross-section of PSII photochemistry (σʹ_PSII), (E,F,G,H) electron transfer rate from PSII (ETR), and (I,J,K,L) the rate constant for the reopening of PSII reaction centers (1/τ) with N starvation and during recovery following the resupply of N. Symbols for recovery response are the same as in Fig 1. The values shown for σʹ_PSII at each sampling point were determined under low actinic light (8 and 21 μmol photons m^-2 s^-1 for prasinophytes and diatoms respectively) as explained in the text. Error bars represent propagated standard error based on the calculated error of curve fitting by the FRRf software and the standard error among triplicate cultures.