Yeast species significantly differ in cell size
We observed significant differences in average cell size (log cell area
in µm2) between species (mixed model output for fixed
effect ‘species’: F7 = 14.17, p < 0.0001;
Figure 3). Especially S. arboricola , S. eubayanus, andS. uvarum cells are significantly smaller than the cells of all
other species, while S. cerevisiae and S. paradoxus have
significantly larger cells than most other species (Figure 3). The
random effect ‘strain’ explained a small (7.1%) but significant
proportion of the variance in cell size (Wald p = 0.041, Table
S3). Indeed, most species showed some significant differences in cell
size between strains (ANOVA for all species/t-test for S. jurei :
all F/t > 3.40, all p < 0.04), except for
the three S. arboricola strains, which were more uniform in size.