Comparison of Nutrients and Antioxidant Activities in Sweet Potatoes

Table 9

Correlation coefficient of TPC, caffeic acid derivatives, vitamin C, carotenoids, TAC (DPPH), and TAC (ABTS⁺) in 48 sweet potato cultivars.

Traits	Chlorogenic acid (µg·100 g^−1·DW)	Caffeic acid (µg·100 g^−1·DW)	3,5-Dicaffeoylquinic acid (µg·100 g^−1·DW)	3,4-Dicaffeoylquinic acid (µg·100 g^−1·DW)	4,5-Dicaffeoylquinic acid (µg·100 g^−1·DW)	Vitamin C (mg·100 g^−1·DW)	TAC (DPPH) (µg·g^−1·DW)	TAC (ABTS^+) (µg·g^−1 DW)
TPC (µg·g^−1·DW)	0.674	0.147	0.706	0.305	0.678	0.316	0.546	0.576
Chlorogenic acid (µg·100 g^−1·DW)		0.360	0.954	0.378	0.903	0.516	0.794	0.767
Caffeic acid (µg·100 g^−1·DW)			0.383	0.026	0.433	0.258	0.486	0.169
3,5-Dicaffeoylquinic acid (µg·100g^−1·DW)				0.430	0.917	0.507	0.809	0.749
3,4-Dicaffeoylquinic acid (µg·100g^−1·DW)					0.515	−0.029	0.277	0.418
4,5-Dicaffeoylquinic acid (µg·100g^−1·DW)						0.378	0.768	0.692
Vitamin C (mg 100 g^−1·DW)							0.487	0.488
Carotenoids (µg·g^−1·DW)							0.362	0.052
TAC (DPPH) (µg·g^−1·DW)								0.601

TAC, total antioxidant capacity; TPC, total polyphenol content. Significant at 5% level. Significant at 1% level.