. 2015 Nov 4;53(3):1620–1632. doi: 10.1007/s13197-015-2076-9

Table 2.

Flavonols content (μmol/g FW) in onions kept in the storage chamber for 9 months at 4 °C, 10 °C and 25 °C

	0	1	2	3	4	5	6	7	8	9
4 °C
Q	0.05 ± 0.00 ^ab	0.04 ± 0.00^a	0.04 ± 0.02^a	0.05 ± 0.00^ab	0.06 ± 0.02^b	0.06 ± 0.00^b	0.03 ± 0.0^a2	0.04 ± 0.00^abc	0.04 ± 0.16^a	0.05 ± 0.16^a
QMG	0.16 ± 0.01 ^ab	0.41 ± 0.06^a	0.32 ± 0.03^a	0.38 ± 0.05^a	0.36 ± 0.08^a	0.30 ± 0.00^a	0.36 ± 0.04^a	0.34 ± 0.01^a	0.28 ± 0.02^a	0.39 ± 0.02^a
QDG	0.23 ± 0.02 ^a	0.63 ± 0.07 ^b	0.47 ± 0.03^ab	0.58 ± 0.04^b	0.44 ± 0.09^a	0.53 ± 0.00^b	0.64 ± 0.03^abc	0.62 ± 0.04^ab	0.52 ± 0.02^a	0.59 ± 0.00^a
IMG	0.03 ± 0.00 ^b	0.11 ± 0.01^ab	0.09 ± 0.00^b	0.11 ± 0.01^a	0.11 ± 0.00^b	0.10 ± 0.01^abc	0.09 ± 0.00^a	0.10 ± 0.00^a	0.08 ± 0.01^a	0.11 ± 0.00^a
10 °C
Q	0.05 ± 0.00 ^ab	0.01 ± 0.00^a	0.01 ± 0.00^a	0.01 ± 0.00^a	0.01 ± 0.00^a	0.10 ± 0.00^a	0.01 ± 0.02^a	0.01 ± 0.00^a	0.01 ± 0.00^a	0.01 ± 0.00^a
QMG	0.16 ± 0.01^abc	0.19 ± 0.03^a	0.21 ± 0.02^a	0.12 ± 0.01^b	0.15 ± 0.02^a	0.19 ± 0.02^a	0.26 ± 0.03^a	0.20 ± 0.04^a	0.15 ± 0.01^a	0.15 ± 0.02^a
QDG	0.23 ± 0.02^a	0.29 ± 0.02^bc	0.31 ± 0.03^b	0.20 ± 0.03^b	0.28 ± 0.01^ab	0.31 ± 0.02^b	0.34 ± 0.02^ab	0.29 ± 0.03^b	0.25 ± 0.03^b	0.30 ± 0.00^a
IMG	0.03 ± 0.00^a	0.03 ± 0.00^a	0.03 ± 0.00^a	0.02 ± 0.00^abc	0.02 ± 0.00^a	0.02 ± 0.00^a	0.08 ± 1.00^a	0.02 ± 0.00^a	0.02 ± 0.00^a	0.02 ± 0.00^a
25 °C
Q	0.05 ± 0.00^a	0.01 ± 0.00^a	0.01 ± 0.00^a	0.01 ± 0.00^a	0.01 ± 0.00^a	0.01 ± 0.00^ab	0.01 ± 0.00^abc	0.01 ± 0.00^a	0.01 ± 0.00^abc	0.01 ± 0.00^b
QMG	0.16 ± 0.01^b	0.13 ± 0.03^a	0.16 ± 0.05^a	0.15 ± 0.02^a	0.14 ± 0.01^a	0.15 ± 0.02^a	0.16 ± 0.02^a	0.10 ± 0.04^a	0.14 ± 0.01^ab	0.14 ± 0.01^a
QDG	0.23 ± 0.02^b	0.25 ± 0.04^b	0.33 ± 0.08^b	0.33 ± 0.02^b	0.35 ± 0.02^ab	0.35 ± 0.02^b	0.44 ± 0.02^a	0.29 ± 0.04^b	0.34 ± 0.02^a	0.36 ± 0.01^b
IMG	0.03 ± 0.01^a	0.03 ± 0.03^a	0.03 ± 0.03^a	0.03 ± 0.03^a	0.04 ± 0.02^ab	0.03 ± 0.02^ab	0.05 ± 0.03^a	0.03 ± 0.01^ab	0.04 ± 0.03^abc	0.03 ± 0.01^a
Calibration curve equations for flavonols content
flavonols	Equation	r ²
Q	x = (y- 0.0253)/0.00002038	0.9904
QMG	x = (y-0.0174)/0.00006383	0.999
QDG	x = (y- 0.05204)/0.0000117	0.9935
IMG	x = (y- 0.06046)/0.00003633	0.9965

At the 0.05 level, the mean difference values with different letters of superscript are significantly different from each other and the interaction between temperature and storage time is significant

Abbreviations: Q = quercetin aglycone; QMG = quercetin-4′-O-monoglucoside; QDG = quercetin-3,4′-O-diglucoside; IMG = isorhamnetin-3-glucoside