Figure 1.

Carotenoid biosynthetic pathway in higher plant chloroplasts commencing with lycopene (A). lut1, lut2, and aba1 mutations are shown. Carotenoid content of mature green leaves of wild-type and xanthophyll mutant lines are shown in the bar graph (B). Each section of the bar corresponds to a specific carotenoid of the pathway (A). The SDs of the total pool of carotenoids per mole chl a are shown.