Figure 13.

agb1, agg1, and the xlg triple mutant are hypersensitive to d-Glc. Seeds were sown on 0.5× MS plates (1% [w/v] agar) supplemented with 1% or 6% (w/v) d-Glc. Seeds were germinated under 120 µmol m⁻² s⁻¹ white light for 1 d, then light intensity was dimmed to 60 µmol m⁻² s⁻¹. After 24 d of growth in long-day conditions, anthocyanins were extracted and quantified for mutants of the Gγ subunits (A) and xlg mutants (B). Col-0, agb1, and gpa1 controls were included in both assays. Significant differences from Col-0 (Student’s t test) are indicated: *, P < 0.05 to 0.01; **, P < 0.01 to 0.001; and ***, P < 0.001. All values are means ± se.