图1. 植物对干旱胁迫的响应。随干旱胁迫增加, 虚线代表气孔和表皮导度变化趋势, 实线代表水力导度损失率; Ψg_s88, 气孔导度下降88%的水势; P₅₀和P₈₈, 水力导度分别下降50%和88%的水势; SSM₅₀和SSM₈₈, 用Ψg_s88分别减去P₅₀和P₈₈所计算的气孔安全阈值。

Fig. 1. Phases of drought response to drought stress in plants. With the increase of drought stress, the dotted curve represents the trend of stomatal and cuticular conductance, while the solid curve represents the loss of hydraulic conductance. Ψg_s88, the water potential at 88% loss of stomatal conductance; P₅₀ and P₈₈, the water potential at 50% and 88% loss of hydraulic function, respectively; SSM₅₀ and SSM₈₈, the margins between Ψg_s88 and P₅₀ or P₈₈, respectively.