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. 2016 Feb 17;7:105. doi: 10.3389/fpls.2016.00105

FIGURE 6.

FIGURE 6

Functional antenna size of PSII. (A) Direct measurements of chlorophyll a fluorescence in folio during a 1 s pulse in the range of 200–3500 μmol photons∗m–2∗s–1 were normalized to the PPFD. The dotted, vertical line shows the 300 μs time point. Shown traces for six different plants (Rep1-6, respectively, represented by different line types) grown under GL1800 and measured on the axial or abaxial side of the leaf (respectively, Left and Right panel). (B) Normalized fluorescence at 300 μs as a function of PPFD on plants from GL1800 measured on axial and abaxial side of the leaf (cyan and orange points, respectively). The linear regression fit and its error are shown as a line with a shadow. (C) The relative slope and standard error of a fit of the normalized fluorescence at 300 μs against PPFD relationship corresponding to the functional antenna size of PSII on six different plants (n = 6) grown under GL1800. Data normalized to GL200 measurements performed on adaxial side of the leaves.