Figure 2.

Quantification of both photosystems. A, A 77 K fluorescence analysis on cotyledons of 7-d-old seedlings grown under mHL (230 μmol m⁻² s⁻¹) or vLL (20 μmol m⁻² s⁻¹) compared with an internal fluorescence standard and based on fresh weight. B, Ratio of PSI to PSII in the 77 K fluorescence analysis. C, Ratio of chlorophyll a to b in 7-d-old seedlings grown under mHL and vLL. D, Western analyses on total protein extracted from 7-d-old seedlings grown under vLL, mLL (90 μmol m⁻² s⁻¹), or mHL. Numbers below indicate the intensity compared with the wild type (WT) of the same light condition as an average of two independent analyses. Cytb₆f, Cytochrome b₆f; s4, sco4; S4c, sco4 complemented with wild-type SCO4; cyt, cytosol; dil., dilution series.