RNA gel-blot analysis of DODA gene expression in P. grandiflora flowers. Presence or absence of betalain pigments (no Pg DODA) in plant tissue is indicated by + or - signs. A, Pg petals of different genotypes (W, white cc, -, -; dY, deep yellow C-, rr, ii; pY, pale yellow C-, rr, I-; Vi, violet C-, R-, ii). B, Pg stems and leaves. C, Expression at different stages of bud development (with yellow immature [Yi], yellow mature [Ym], violet immature [Vii], and violet mature [Vim]). D, RNA gel-blot analysis of expression of the putative red beet (Bv) DODA in Bv colored calli containing betalains and green calli lacking betalain (Vi, violet; O, orange; Y, yellow; and G, green).