The use of osmoregulators and antioxidants to mitigate the adverse impacts of salinity stress in diploid and tetraploid potato genotypes (Solanum spp.)

Chemical and Biological Technologies in Agriculture

Table 4 Callus fresh weight, % of explants forming callus and % of explants forming roots of 13 genotypes of potato divided into 7 tetraploid cultivars of Solanum tuberosum (tbr), and 6 diploid clones of S. chacoense (chc) grown in vitro under stress conditions

Genotypes	Callus fresh weight (g)		% of explants forming callus		% of explants forming roots
Genotypes	Control	Stress	Control	Stress	Control	Stress
Tetraploid cultivars of S. tuberosum (tbr)
Agata	1.30	0.72	86.00	42.00	99.0	22.11
Atlantic	4.15	1.88	87.33	54.56	89.0	30.89
Anya	1.34	0.38	86.33	31.78	99.0	2.00
Diamond	3.45	3.12	86.67	84.89	99.0	57.78
Gala	1.35	0.37	86.81	33.42	98.0	1.70
Kennebec	2.03	1.11	86.00	51.22	88.0	20.89
Russet Burbank	2.72	1.37	86.33	42.00	99.3	16.44
Diploid clones of S. chacoense (chc)
A-6	1.74	2.03	86.33	85.11	88.33	83.67
B-7	1.09	0.70	88.00	77.44	88.33	83.67
C-8	1.54	1.86	87.33	89.22	91.00	88.78
C-9	1.11	1.06	84.67	42.33	84.67	67.44
D-2	2.56	2.28	84.67	65.33	90.00	78.89
D-3	1.61	1.50	86.33	87.89	89.33	82.22
LSD (0.05)	0.102		1.304		1.221

Explants were grown on media supplemented with three different concentrations of NaCl (100, 200 or 300 mmol L⁻¹) and the average tested parameters over the combined three levels of stress were compared with the control (no stress)