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. 2026 Jul 28;17:1887737. doi: 10.3389/fpls.2026.1887737

Figure 2.

Bar chart with two panels labeled A and B compares plant height and leaf number, respectively, across salt stress concentrations (zero, fifty, one hundred, one hundred fifty millimoles per liter) and four treatments (zero, five percent, fifteen percent, twenty-five percent PEG-6000). Both plant height and leaf number decline with increasing salt concentration, with the lowest values seen at higher concentrations and higher PEG-6000 percentages. Statistical significance indicators are present for main effects and interactions, and bars are annotated with letters for group comparison.

Effects of combined drought and salinity stress on the number of leaves and plant height of alfalfa seedlings. (A) Plant height, (B) Leaf number. D, drought stress; S, salinity stress; D × S, interaction between drought stress and salinity stress. Different lowercase letters above bars indicate significant differences among treatments at P < 0.05. *, **, and *** indicate significance at P < 0.05, P < 0.01, and P < 0.001, respectively; ns indicates no significant difference.