Figure 8.

Redistribution of ¹³C label following incubation of Arabidopsis mutants and wild-type leaves. The incubation was followed via the transpiration stream in [U-¹³C] Val (A) or [U-¹³C] Lys (B) solution. The leaf material was harvested from the ninth or 10th leaves of 4-week-old, short-day-grown, Arabidopsis plants after growth for 0, 10, and 15 d in extended darkness. Values represent absolute redistribution and are given as means ± se of determinations on six independent samplings; an asterisk indicates values that were determined by the Student’s t test to be significantly different (P < 0.05) from the wild type.