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. 2014 Aug 3;23(4):701–708. doi: 10.1016/j.jfda.2014.07.002

Table 2.

Antioxidant activities (mg trolox equivalent/g freeze-dried tissue dry weight) of different aerial parts of sweet potato plants.^*

	Antioxidant activity

	DPPH	FRAP	TEAC
Leaf blade
Expanding leaf	237.90 ± 15.63^a	885.64 ± 88.08^a	108.94 ± 2.27^a
First fully expanded leaf	150.68 ± 3.37^b	445.69 ± 68.95^b	99.96 ± 2.85^a
Second fully expanded leaf	90.58 ± 5.88^c	237.31 ± 16.32^c	89.85 ± 9.04^d
Third fully expanded leaf	76.64 ± 3.28^e	203.25 ± 12.71^c,e	80.91 ± 1.19^d
Fourth fully expanded leaf	64.76 ± 3.78^f	155.82 ± 9.05^f	73.75 ± 0.68^b
Leaf petiole
Expanding leaf	176.02 ± 2.75^d	530.27 ± 304.87^d	103.28 ± 4.61^a
First fully expanded leaf	96.45 ± 2.57^c	227.21 ± 30.89^c	70.64 ± 12.99^b
Second fully expanded leaf	65.74 ± 2.05^f	224.90 ± 16.69^c	71.78 ± 5.14^b
Third fully expanded leaf	48.64 ± 0.79^g	187.02 ± 16.61^e	58.15 ± 4.64^c
Fourth fully expanded leaf	9.20 ± 1.25ⁱ	117.51 ± 9.93^g	33.56 ± 0.55^f
Stem	37.53 ± 0.34^h	122.99 ± 16.11^g	35.81 ± 1.54^f
Flower	44.60 ± 0.59^g	148.88 ± 11.83^f	49.33 ± 7.51^e

Results are presented as means of four determinations ± standard deviation.

DPPH = 1,1-diphenyl-2-picrylhydrazyl; FRAP = ferric reducing antioxidant power; TEAC = trolox equivalent antioxidant capacity.

^*

Values with same superscript letters within rows are not significantly different at p < 0.05.