Figure 6.

Low Pi availability triggers a reduction of 28-norCS. A, Structures of detected BR molecules are shown and arranged according to their synthesis pathway. Numbers present the average levels (picograms per milligram) of BRs detected in whole seedlings of the wild type (Col-0) and bzr1-D grown under adequate (green) or deprived (gray) Pi (1 μm) conditions. Numbers in parentheses represent se. The blue triangles indicate that samples with measurements below detection (<0.1 pg mg⁻¹) were also taken for average values (hence, considered noise). *, P < 0.05 with two-tailed Student's t test. B, Analysis of relative expression of BR biosynthesis genes in roots and shoots of wild-type and bzr1-D plants grown under adequate or deprived Pi (1 μm) conditions. Error bars represent se.