Comparison of phytochemicals and their antioxidant activity in seven date palm varieties grown in Iran

Figures & data

Table 1. Ascorbate peroxidase (APX), superoxide dismutase (SOD), and catalase (CAT) activities in seven date palm varieties at ripening stage.

Varieties	APX (U/mgprotein)	SOD (U/mgprotein)	CAT (U/mgprotein)
Shahani	19.1^ab	22.03^ab	12.03^ab
Mazafati	19.13^ab	22.1^ab	12.1^ab
Khasab	15.21^e	14.98^e	7.15^e
Khenizi	16.28^d	17.28^d	9^d
Klote	22.25^a	28.54^a	15.31^a
Halili	17.15 ^c	19.31 ^c	10.23 ^c
Qorbani	20.01^b	25.13^b	13.1^b

Values in the same column with different superscript letters represent significant differences between date palm varieties at p <.05 by Duncan’s test.

Table 2. Total phenolics, flavonoids, anthocyanins, and tannins content in seven date palm varieties at ripening stage.

Variety	Total Phenolic (mg/g FW)	Total Flavonoid (mg/g FW)	Anthocianin (mg/g FW)	Tannin (mg/gFW)
Shahani	90.58b	0.35 c	0.302b	0.34ab
Mazafati	93.04^b	0.39^b	0.318^b	0.32 ^c
Khasab	92.11^b	0.38^b	0.311^b	0.31 ^c
Khenizi	82.47 ^c	0.28^e	0.278 ^c	0.42^a
Klote	98.31^a	0.45^a	0.352^a	0.21^e
Halili	86.34 ^c	0.31^b	0.285 ^c	0.36^b
Qorbani	95.26^b	0.41^ab	0.329^b	0.28^d

Values in the same column with different superscript letters represent significant differences between date palm variety at p <.05 by Duncan’s test.

Figure 1. Comparison of antioxidant capacity in seven date palm varieties at ripening stage. Means with the same letter are not significantly different from each other (p ≤.05).

Figure 2. Correlation between phenolic compounds and antioxidant capacity in seven date palm varieties at ripening stage.

Figure 3. Comparison of soluble sugar content in in seven date palm varieties at ripening stage. Means with the same letter are not significantly different from each other (p ≤.05).

Figure 4. Comparison of reducing sugar content in seven date palm varieties at ripening stage. Means with the same letter are not significantly different from each other (p ≤.05).

Figure 5. Comparison of carotenoid content in seven date palm varieties at ripening stage. Means with the same letter are not significantly different from each other (p ≤.05).

Figure 6. Comparison of moisture content in in seven date palm varieties at ripening stage. Means with the same letter are not significantly different from each other (p ≤.05).