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. 2009 May 6;60(11):3031–3042. doi: 10.1093/jxb/erp131

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© 2009 The Author(s).

This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/2.0/uk/) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

This paper is available online free of all access charges (see http://jxb.oxfordjournals.org/open_access.html for further details)

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Fig. 6. — Changes in light-acclimated PSII effective yield, Φ_PSII, and non-photochemical energy quenching (either regulated, Φ_NPQ, or non-regulated, Φ_NO), versus incident light level, in green (closed circles) or red (open circles) leaves. The experiment was performed during the ‘red’ period (5 March 2008) and the left and right panels refer to values obtained from the upper and lower leaf side, respectively. The leaves remained under the indicated PAR until stable values for each parameter were obtained. Values are means ±standard deviation from five plants (four leaves per plant). The asterisks denote statistically significant (P <0.05) differences between the two phenotypes in the parameter indicated for each PAR level.