Fig. 6. Abnormality index calculated for wild-type epidermal cells overlying wild-type mesophyll or mutant mesophyll, or near a lateral sector boundary in the epidermis (see Materials and Methods for methodology). Note that for 5 of the 6 transverse boundaries included in this analysis having wild-type epidermal cells overlying mutant mesophyll, all mesophyll layers were mutant. (A) Stomatal files. (B) Adjacent, non-stomatal files. Error bars show standard deviations.