Table 4.

Densitometric analysis of leaf malate dehydrogenase isozyme of stevia varieties (Sugar High A3 and Spanti) grown in different NaCl concentrations (0, 500, 1000, 2000, and 3000 mg L⁻¹) in vitro.

Malate Dehydrogenase Groups	Relative Mobility	Stevia Varieties
		Sugar High A3					Spanti
		SuC	Su1	Su2	Su3	Su4	SpC	Sp1	Sp2	Sp3	Sp4
MDH 1	0.29	0	0	0	0	0	0	1−	0	0	0
MDH 2	0.33	1+	1+	1+	1+	1+	1+	1−	0	1−	1−
MDH 3	0.40	0	1−	1−	0	0	0	1−	0	1−	1−
MDH 4	0.52	1+	1+	1+	1+	1+	1+	1+	1−	1+	1+
MDH 5	0.55	1−	1−	0	1−	1−	1−	1−	0	0	0
MDH 6	0.78	1+	1+	1+	1++	1+	1+	1−	1−	1+	1+
MDH 7	0.83	1+	1+	1+	1+	1−	1−	1−	1−	1+	1+

SuC: Sugar high A3 variety at control conditions (salt-free); SpC: Spanti variety at control conditions (free salt); Su1: Sugar high A3 at 500 mg L⁻¹ NaCl; Sp1: Spanti at 500 mg L⁻¹ NaCl; Su2: Sugar high A3 at 1000 mg L⁻¹ NaCl; Sp2: Spanti at 1000 mg L⁻¹ NaCl; Su3: Sugar high A3 at 2000 mg L⁻¹ NaCl; Sp3: Spanti at 2000 mg L⁻¹ NaCl; Su4: Sugar high A3 at 3000 mg L⁻¹ NaCl; Sp4: Spanti at 3000 mg L⁻¹ NaCl; 1 = Present band, 0 = Absent band, ++ = High density band, + = Moderate density band and − = Low density band.