Table 1. Summary of the leaf phenotype of maize, setaria and rice scr, nkd and scr;nkd mutants from this study and previous work [4,5].

Species	Mutant	Leaf phenotype
Maize	Zmscr1;Zmscr1h	Veins separated by only one M cell, increase in sclerenchyma and ectopic BS cells. Occasional fused veins. Stomata normal on abaxial side but slightly reduced in number on adaxial side.
	Zmnkd1;Zmnkd2	No obvious perturbations
	Zmscr1;Zmscr1h;Zmnkd1;Zmnkd2	Large increase in the number of fused veins relative to Zmscr1;Zmscr1h mutants. Examples of >2 veins fused together.
Setaria	Svscr1;Svscr2	No stomata. More veins separated by only one M cell than in wild-type
	Svnkd	No obvious perturbations
	Svscr1;Svscr2;Svnkd	Increased incidence of fused veins but fewer than in maize.
Rice	Osscr1;Osscr2	No stomata. No obvious inner leaf perturbations
	Osnkd	No obvious perturbations.
	Osscr1;Osscr2;Osnkd	Phenotype same as Osscr1;Osscr2.