Figure 2.

Seven stages of soybean cotyledon development and transcription factor expression. Stage 1 is after 24 h of imbibition of dry mature seed. Stage 7 is approximately 7 d after planting. During stages 3 to 5, the cotyledons began to turn green and undergo a functional transition from a storage organ to a photosynthesizing organ. Stage numbers are indicated above each image. RNA-Seq data for transcription factor gene models at each stage are included at bottom. (YABBY is represented by two gene models.) For the full RNA-Seq data and gene model numbers, see Supplemental Table S1. TF, Transcription factor.