Table 4.
Color parameters, polyphenol, flavonoid and proanthocyanidin contents of Aster scaber in response to different blanching solutes

Blanching solutes1)	a value	Chroma value	Delta E2)	Polyphenols (mg GAE3)/g)	Flavonoids (mg RHE4)/g)
Non-treated	-8.23±0.11b6)	10.94±0.09b	2.03±0.25b	6.06±0.15a	2.89±0.01a
Sol-Ca	-7.46±0.20a	10.29±0.23c	1.81±0.10b	4.68±0.01b	2.58±0.05c
NaHCO3	-7.78±0.04a	10.65±0.08b	3.14±0.28a	3.95±0.06c	2.03±0.06d
MgSO4	-8.29±0.09b	11.44±0.24a	1.58±0.29b	6.27±0.28a	2.76±0.06b

Abbreviations: Non-treated, water blanching; Sol-Ca, 0.1% soluble calcium; NaHCO³, 0.1% soium bicarbonate; MgSO₄, 0.1% magnesium sulfate
Leaves before blanching: L(28.32), a(-8.71), b(9.24)
Abbreviations: GAE, gallic acid equivalents; RHE, rutin hydrate equivalents; CHE, catechin hydrate equivalents
Values are mean standard deviation of triplicate determinations. Different superscripts within a column (a-d) indicate significant differences (p<0.05)