Table 2. Total polyphenol and flavonoid contents of kale under conventional and organic cultivation systems

Samples		Total polyphenols (μg GAE1)/g)	Total flavonoids (μg QE2)/g)
Conventional	A	287.97±4.953)b4)	40.63±0.89d
	B	274.94±3.82c	43.10±1.52c
	C	238.56±1.98d	18.07±1.03e
Organic	D	304.90±10.13a	47.14±1.56b
	E	288.47±10.47b	44.33±1.22c
	F	312.53±8.35a	75.40±2.72a

GAE, gallic acid equivalent.
QE, quercetin equivalent.
All values are mean±SD (n=3).
Means with different superscript letters (^a-e) in the same column are significantly different (p<0.05) by Duncan’s multiple range test.