Fig. 8.
Changes in leaf pigment composition of Col-0, C24 and Eri. a Total chlorophyll content. b Chlorophyll a to chlorophyll b ratio. c Pool size of the xanthophyll-cycle pigments. Leaf samples for a–c were harvested at the end of the night period on day 0 (all plants under C 50) and day 7 (C 50 or SSF 1250/6). None of the leaves contained A or Z except a single SSF sample of Col-0 in which a small amount of A was detected on day 7. d De-epoxidation state (DPS) of the xanthophyll-cycle pigments after 5-min exposure to 1,000 μmol photons m−2 s−1. The DPS was calculated as (A + Z)/(V + A + Z). For each accession, asterisks indicate significant differences (**P < 0.01; *P < 0.05) between day 0 (C 50) and day 7 of SSF 1250/6; plus signs indicate significant differences (++ P < 0.01; + P < 0.05) between C 50 and SSF 1250/6 on day 7. Data are means of 3~4 plants (±SE)