Figure 1.
Total Chl (squares) and carotenoid (triangles) contents (A), xanthophyll-cycle pigments pool (V + A + Z, squares) and de-epoxidation status of the xanthophyll cycle (A + Z)/(V + A + Z) (triangles; B), and α-tocopherol content of ML of Arabidopsis plants (white symbols, wild type; black symbols, npq1; C) grown at PPFDs from 100 to 1,500 μmol m−2 s−1. Duration of the light treatments was 20 d except for the highest PPFD (10 d). Leaves were taken in the morning, approximately 1 h after the beginning of the light phase. Data are the means of four separate experiments ± sd.