Figure 6.

Nucleotide levels in leaves of adk1⁻ Arabidopsis plants. Plants were grown as described for Figure 5, and samples were taken 6 h into the photoperiod. Black bars correspond to Col-0 plants and white ones to the homozygous mutant (adk1⁻/adk1⁻). Values are means ± se of measurements from four to six plants per genotype. Asterisks indicate those that were determined by the Student's t test to be significantly different (P < 0.05) between genotypes.