Figure 10.

Enhanced amines in CMS leaves are not correlated with growth phenotype or leaf nitrate, but are associated with increases in NADH. A, Shoot morphologies at different photoperiods: 9 h (left), 16 h (middle), or continuous light (24 h, right). Photographs show plants 10 (9 h) or 7 weeks (16 and 24 h) after germination. B, Leaf fresh weight (FW), and contents of chlorophyll, nitrate, amines, and reduced and oxidized forms of pyridine nucleotides at different photoperiods. For pyridine nucleotides, the red blocks indicate reduced forms (NADH and NADPH). Assays were performed on leaf material harvested in the middle of the photoperiod from plants 11 weeks (9 h photoperiod) or 8 weeks (16 and 24 h photoperiods) after germination (three independent extracts; standard errors were in the same range as data shown in Figure 8).