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

Figure 7.

Horizontal bubble chart showing ten groups with different combinations of PEG and NaCl concentrations on the y-axis and a value from zero to about zero point eight on the x-axis. Colored bubbles indicate group position and magnitude, with higher values on the top and lower on the bottom. Groups are labeled one to ten, and bubble colors range from blue at the top to orange and green in the middle, and light blue at the bottom.

Ranking of average membership values of alfalfa under different combined drought and salinity stress treatments. Points represent the average membership value (μ) of each PEG–NaCl treatment, and horizontal lines indicate the corresponding ranking position. Treatments are arranged in descending order according to their average membership values. Numbers beside the points indicate the comprehensive ranking of each treatment. Higher average membership values indicate better overall performance and lower stress-induced injury, whereas lower values indicate greater injury under combined drought and salinity stress. PEG concentrations are expressed as % w/v, and NaCl concentrations are expressed as mmol·L-1.