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. 2009 Nov 10;9:130. doi: 10.1186/1471-2229-9-130

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Copyright © 2009 Havaux et al; licensee BioMed Central Ltd.

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

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Photosynthetic parameters of WT Arabidopsis leaves and leaves of the pdx1 mutant grown under control conditions (150-200 μmol m^-2s^-1, 25°C). A) Quantum yield of PSII photochemistry (ΔF/Fm'), B) oxygen exchange and C) NPQ measured at different PFDs. Data are mean values of 3 or 4 measurements ± SD. D) Light-induced conversion of violaxanthin (V) into zeaxanthin (Z) and antheraxanthin (A), as calculated by the equation (A+Z)/(V+A+Z). Zeaxanthin synthesis was induced by white light of PFD 1000 μmol m^-2s^-1. Each point corresponds to a different leaf (1 measurement per point).

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