FIGURE 3.

Overview of the impact of the different stresses on the drop of viability. The “drop of viability” under stress exposure was calculated as the difference between the initial viability (exponentially growing cells in the YN Gal or YN GalTre medium) and the viability after exposure to a stress of interest for the desired time. To better determine the impact of the stress in this box plot representation, we plotted the negative of “drop of viability values. −, median with median notches; +, mean. The range covered by each notch on the median shows the uncertainty associated with the estimate of the median of that group. The notches are scaled in such a way that any two samples whose notches do not overlap can be declared to have significantly different medians at the default system significance level (5%). Except for the ethanol treatment that was performed for 6 h, residual viability of the cells was assessed after 2 h of stress exposure, in the presence (+) or in the absence (−) of trehalose. Control was viability of exponentially growing cells before stress exposure.