Heuchera Creme Brulee and Mahogany Medicinal Value under Water Stress and Oligosaccharide (COS) Treatment

Table 3

Antioxidant activity in leaf methanolic extracts, total phenolic and total chlorophyll content of two Heuchera cultivars. Values are means of triplicate determinations ±sd.

Water interval	Oligosaccharides treatment; (ppm)		DPPH free radical scavenging activity; (IC50, μg ml^−1)		β-Carotene-linoleic acid assay; (IC50, μg ml^−1)		Total phenolic content; (mg GAE g^−1)		Total chlorophyll content; (mg g^−1 DW)
			2017	2018	2017	2018	2017	2018	2017	2018
2DWI	0	Creme Brulee	10.3 ± 0.01a	11.1 ± 0.07a	11.2 ± 0.01a	11.5 ± 0.01a	10.4 ± 0.1 c	9.7 ± 0.1 c	0.65 ± 0.04b	0.63 ± 0.01bc
	50		9.3 ± 0.06b	9.9 ± 0.01b	10.3 ± 0.03b	10.4 ± 0.02b	10.9 ± 0.1 b	10.4 ± 0.3 b	0.69 ± 0.02a	0.67 ± 0.03a
	200		9.1 ± 0.05b	9.9 ± 0.02b	10.3 ± 0.03b	10.7 ± 0.03b	10.8 ± 0.0 b	10.5 ± 0.2 b	0.70 ± 0.02a	0.68 ± 0.01a
	500		9.6 ± 0.03a	10.4 ± 0.03a	11.2 ± 0.02a	11.5 ± 0.04a	10.4 ± 0.2 c	10.0 ± 0.1 c	0.68 ± 0.01ab	0.65 ± 0.02ab
6DWI	0		8.2 ± 0.04c	8.9 ± 0.05c	9.3 ± 0.01c	10.1 ± 0.03c	10.9 ± 0.4 b	10.4 ± 0.2 b	0.61 ± 0.02c	0.60 ± 0.03c
	50		6.3 ± 0.02d	6.8 ± 0.00d	7.4 ± 0.02d	8.2 ± 0.02d	11.6 ± 0.3 a	11.2 ± 0.2 a	0.65 ± 0.01b	0.64 ± 0.02b
	200		6.2 ± 0.01d	6.8 ± 0.01d	7.2 ± 0.03d	8.2 ± 0.02d	11.6 ± 0.1 a	11.3 ± 0.2 a	0.65 ± 0.01b	0.65 ± 0.03ab
	500		7.8 ± 0.03c	8.3 ± 0.01c	9.2 ± 0.04c	9.9 ± 0.01c	11.1 ± 0.2 b	10.5 ± 0.4 b	0.62 ± 0.02c	0.61 ± 0.01c
2DWI	0	Mahogany	8.9 ± 0.4a	9.6 ± 0.1a	10.1 ± 0.3a	10.7 ± 0.2a	12.3 ± 0.2 c	11.7 ± 0.3 c	0.71 ± 0.01b	0.70 ± 0.02b
	50		7.4 ± 0.02b	7.9 ± 0.01b	8.5 ± 0.01b	9.4 ± 0.03b	12.7 ± 0.3 b	12.4 ± 0.1 b	0.75 ± 0.02a	0.74 ± 0.01a
	200		7.1 ± 0.01b	7.8 ± 0.04b	8.4 ± 0.00b	9.3 ± 0.03b	12.9 ± 0.4 b	12.5 ± 0.2 b	0.76 ± 0.01a	0.75 ± 0.01a
	500		8.2 ± 0.02a	8.8 ± 0.03a	9.5 ± 0.03a	10.4 ± 0.02a	12.2 ± 0.1 c	12.1 ± 0.3 bc	0.72 ± 0.01b	0.70 ± 0.02b
6DWI	0		7.1 ± 0.03b	7.7 ± 0.02b	8.4 ± 0.01b	8.9 ± 0.03b	13.1 ± 0.1 b	12.4 ± 0.2 b	0.66 ± 0.02c	0.63 ± 0.01c
	50		5.4 ± 0.01c	5.7 ± 0.02c	6.6 ± 0.03c	7.2 ± 0.03c	13.8 ± 0.2 a	13.2 ± 0.0 a	0.70 ± 0.01c	0.68 ± 0.03c
	200		4.8 ± 0.03c	5.5 ± 0.07c	6.2 ± 0.02c	7.1 ± 0.02c	13.9 ± 0.3 a	13.4 ± 0.1 a	0.71 ± 0.01a	0.68 ± 0.02a
	500		6.8 ± 0.01b	7.4 ± 0.03b	7.9 ± 0.03b	8.2 ± 0.01b	13.4 ± 0.2 ab	12.5 ± 0.1b	0.68 ± 0.02b	0.64 ± 0.03b

Means followed by different letters within columns are significantly different based on LSD test (P ≤ 0.05).