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 1 Roots fresh weight, surface area of root, total root length and number of roots/plantlet 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	Roots fresh weight (g)		Surface area of root (cm²)		Total root length (mm)		No. of roots/plantlet
Genotypes	Control	Stress	Control	Stress	Control	Stress	Control	Stress
Tetraploid cultivars of S. tuberosum (tbr)
Agata	0.850	0.563	1.140	0.741	111.25	104.35	8.65	6.32
Atlantic	0.941	0.345	0.790	0.576	66.32	50.15	6.33	5.38
Anya	0.984	0.250	0.547	0.170	69.61	32.29	6.55	2.25
Diamond	1.290	1.025	1.110	0.898	94.32	83.71	8.79	8.06
Gala	0.910	0.308	0.980	0.187	98.17	22.05	8.16	1.71
Kennebec	0.904	0.507	0.721	0.502	57.65	53.12	6.24	5.79
Russet Burbank	1.049	0.799	1.110	0.787	89.63	72.85	9.88	8.35
Diploid clones of S. chacoense (chc)
A-6	1.036	1.212	1.433	1.160	99.74	93.79	10.10	10.07
B-7	0.905	0.610	0.841	0.470	80.14	35.50	8.67	7.22
C-8	0.999	1.292	1.490	1.432	88.32	83.77	9.57	9.14
C-9	0.874	0.482	0.547	0.470	69.34	30.53	7.84	6.04
D-2	1.205	0.926	1.580	1.242	113.32	109.27	10.51	10.71
D-3	0.895	0.962	0.990	0.633	75.68	75.60	8.10	6.59
LSD (0.05)	0.06179		0.2304		1.0122		0.2413

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)