Figure 4.

Effects of PIP1b Overexpression on Several Physiological Parameters of the Plants.

Transpiration rate (A), photosynthesis rate (B), the chlorophyll fluorescence parameter Fv/Fm (C), and cell membrane stability (D) (measured by an EC ratio whose relatively lower values are correlated with better membrane vitality) are shown. Measurements were performed on the first fully exposed leaves of wild-type (white columns) and transgenic PIP1b2 and PIP1b3 (gray columns) lines. Bars represent the standard errors of the means of at least five plants per genotype. Different letters above the columns indicate statistically significant differences at the 0.05 level. WT, wild type.