Figure 1

An angiosperm phylogram with illustrations of flower structures and the loop design of the E. californica microarray experiments. (a) A phylogram of angiosperms with flower architectures for several representative species. C, carpel; It, inner tepals; Ot, outer tepals; P, petal; S, sepal; St, stamen; Std, staminodia. (b) We sampled from eight different tissues, including leaves, small floral buds, medium floral buds, four floral organs (sepals, petals, stamens, and pistils) at anthesis, and young fruits (four replicates for each tissue, 32 in total). Each line connects samples from two tissues in one microarray hybridization reaction, and four different colors represent four replicates of each tissue. The points of the arrows point to the samples labeled with Cy5 dyes while the bases of the arrows point to the samples labeled with Cy3 dyes.