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. 2018 Feb 19;247(6):1293–1306. doi: 10.1007/s00425-018-2854-5

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© The Author(s) 2018

Open AccessThis article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.

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Fig. 2 — Rapid light curves measured on freshly collected B. corticulans algal tufts. Algae were dark adapted for 30 min, after which ten gradually increasing intensities of actinic light were applied, each lasting 10 s and followed by a saturating pulse. Data are averages of 24 repeats ± SEM. Relative photosynthetic efficiency (α), electron transport rate (ETR) and light-saturation parameter (Ek) were calculated by fitting the model of Platt et al. (1980)