Table 3.

Enzyme inhibitory activities in green and red Salanova lettuce (S) in nutrient solutions with different macrocations concentration (C). AChE, acetylcholinesterase, BChE, butyrylcholinesterase, GALAE, galantamine equivalents, KAE, kojic acid equivalents, ACAE, acarbose equivalents.

Source of Variance	AChE	BChE	Tyrosinase	Amylase	Glucosidase
	(mg GALAE)	(mg GALAE)	(mg KAE)	(mmol ACAE)	(mmol ACAE)
Salanova (S)
Green	2.20 ± 0.14	5.58 ± 0.21 a	64.77 ± 0.90	0.35 ± 0.01	0.79 ± 0.01
Red	1.88 ± 0.21	4.55 ± 0.20 b	65.82 ± 1.37	0.35 ± 0.01	0.84 ± 0.04
Concentration (C)
Full strength	1.98 ± 0.19	5.25 ± 0.12 a	66.62 ± 1.45	0.35 ± 0.01 ab	0.83 ± 0.02
Half strength	2.16 ± 0.25	5.36 ± 0.32 a	62.54 ± 1.47	0.37 ± 0.02 a	0.85 ± 0.04
Quarter strength	1.98 ± 0.20	4.59 ± 0.34 b	66.72 ± 1.00	0.33 ± 0.01 b	0.78 ± 0.04
C × S
Green × Full strength	2.23 ± 0.12	5.30 ± 0.19 ab	63.08 ± 1.29	0.35 ± 0.02 b	0.79 ± 0.02
Green × Half strength	2.55 ± 0.05	6.16 ± 0.40 a	63.85 ± 0.65	0.34 ± 0.01 b	0.78 ± 0.02
Green × Quarter strength	1.79 ± 0.39	5.27 ± 0.36 ab	67.38 ± 2.00	0.35 ± 0.02 b	0.81 ± 0.02
Red × Full strength	1.23 ± 0.04	5.20 ± 0.15 ab	70.17 ± 1.59	0.35 ± 0.01 b	0.86 ± 0.02
Red × Half strength	1.90 ± 0.40	4.56 ± 0.18 bc	61.23 ± 2.90	0.40 ± 0.02 a	0.92 ± 0.07
Red × Quarter strength	2.18 ± 0.04	3.90 ± 0.44 c	66.06 ± 0.46	0.31 ± 0.01 b	0.74 ± 0.09
Significance
Salanova (S)	ns	***	ns	ns	ns
Concentration (C)	ns	**	ns	***	ns
S × C	ns	*	ns	***	ns

All data are expressed as mean ± s.e; n = 6. The symbol ns, *, ** and *** indicate a nonsignificant or a significant statistical difference at p ≤ 0.05, 0.01, and 0.001, respectively. For each variable, letters indicate statistical homogenous groups according to Duncan’s multiple-range test (p = 0.05). The factor Salavanova was compared according to Student’s t-test.