Table 7. Functional constituents of whole onion by growth stage (unit: mg/100 g FW)

Growth stage		Chlorophyll			Total thiosulfinate	Antioxidant activity (ABTS⁺ radical scavenging)
Growth stage		a	b	Total	Total thiosulfinate	Vit.C eq.	RC₅₀
Whole onion	16 weeks	10.6±0.05^b1)	36.8±0.04^b	47.4±0.08^b	6.57±0.14^c	507±7.85^b	8.38±0.14^b
	17 weeks	10.4±0.06^a	36.9±0.02^a	47.3±0.07^a	5.99±0.07^e	527±19.9^a	7.39±0.36^a
	19 weeks	7.69±0.16^c	27.0±0.21^c	34.6±0.37^c	5.42±0.18^f	421±8.08^c	9.43±0.23^c
	21 weeks	6.11±0.05^d	21.3±0.10^d	27.3±0.15^d	5.90±0.03^e	341±3.36^d	12.67±0.34^f
	23 weeks	4.82±0.02^e	16.9±0.02^e	21.7±0.04^e	6.33±0.08^d	492±10.3^b	10.45±0.20^d
	25 weeks	1.97±0.06^g	6.92±0.10^g	8.89±0.16^g	7.23±0.06^a	424±2.70^c	11.27±0.32^e
Onion bulb		0.07±0.02^h	0.15±0.03^h	0.21±0.04^h	6.99±0.05^b	358±4.45^d	13.60±0.09^g
Green onion		2.97±0.03^f	10.2±0.04^f	13.2±0.06^f	6.97±0.20^b	221±9.58^e	19.05±0.52^h

Values are expressed as mean±SD (n=3). Means with different superscripts within each column are significantly different (p<0.05) by Duncan’s multiple range test.