(a) Drought stress was induced using different concentrations of PEG solution (0%, 10%, 15%, and 20%) for a duration of 24 h in Fany and Longya10 flax plants. (b) Morphological changes in Fany and Longya10 flax plants were observed under 10% PEG solution for 24 h. A comparison was made between the mock condition (control) and the stress condition. (c) The following parameters were evaluated in Fany and Longya10 flax plants: shoot weight, fresh weight, root weight, RWC, and rate of water loss (RWL). The abbreviations M-Fn and M-Ly represent flax growth in the mock condition derived from Fany and Longya10 flax, respectively. D-Fn and D-Ly represent flax growth in the stress condition derived from Fany and Longya10 flax. Statistical significance between the two columns is indicated by the letters ‘a’, ‘b’ or ‘c’, denoting a significant difference at p < 0.05.