Table 1. Contents of chlorophyll (a+b), carotenoids, and anthocyanin in yellow-green, green, and purple sweet potato leaves. Each point represents the mean of four leaves. Data are mean ± SE. Different letters indicate significant differences in the LSD analyses of Chl (a+b) and Car.

Leaf color	Chl (a+b) [g m–2]	Chl a/b ratio	Carotenoids [g m–2]	Anthocyanin [mmol m–2]
Yellow-green	0.096 ± 0.007c	4.99 ± 0.89a	0.037 ± 0.002b	Not determined
Green	0.337 ± 0.024b	3.20 ± 0.25b	0.060 ± 0.002a	Not determined
Purple	0.413 ± 0.019a	2.58 ± 0.18c	0.058 ± 0.003a	11.802 ± 0.910