Supplemental Figure 12: IL10-3 exhibits QTL affecting pavement cell size and stomatal density. A) Images of epidermal peels from the adaxial side of mature leaves and cotyledons are shown. S. pennellii has larger pavement cells and decreased stomatal density relative to cv. M82, perhaps an adaptive feature to its native arid environment. IL10-3 exhibits decreased stomatal density on the adaxial side of mature leaves relative to cv. M82, and increased pavement cell size and decreased stomatal density on the adaxial side of cotyledons. B) IL10-3 is consistently one of the most extreme ILs for a suite of related traits, including adaxial leaf stomatal density, adaxial cotyledon stomatal density, and adaxial cotyledon pavement cell size. One perspective is that, because stomatal patterning in IL10-3 relative cv. M82 is not significantly changed, increases in pavement cell size decrease stomatal density
