Figure 2.

Potato plants from selected cultivars show differences in the RWC in the subsequent days of drought. RWC was measured in leaves from the four studied cultivars after drought stress: (a) cultivars Gwiazda and Oberon and (b) cultivars Tajfun and Owacja. RWC was measured on day 0, 3, 6, 9 and 13 of drought stress. The measurements taken at various drought time points are presented as a percentage of the RWC of the plant at day 0. The leaves were detached and weighed for the initial FW (fresh weight), SW (saturated weight) and DW (dry weight) values. Calculations were performed as described in the Experimental Procedures section, and values are shown as mean ± SD (n = 3) of three independent experiments. *P < 0.001, Mann–Whitney U‐test.