Figure 3.

Stomatal conductance (a), transpiration rate (b), and the net CO₂ assimilation rate (c) measured three days after inducing salt stress in 4-week old A. thaliana rosettes. Maximal PSII efficiency (F_V/F_M) in A. thaliana plants exposed to salinity under LL (empty box charts) and an acute HL (pattern-filled box charts) is shown in (d). Results are presented as box-and-whisker plots, showing mean, standard error, and outliers at the 95% confidence level. An asterisk (*) indicates significant differences (p ≤ 0.05, the Mann-Whitney U test) between control and salt-treated plants (a–c), and plants before (LL) and after an acute HL treatment (d).