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Figure 1. 

Overview of the gynoecium development in Arabidopsis. (a) Top view of an Arabidopsis inflorescence meristem (IM) consisting of stage 1 to stage 6 floral primordia. Dashed lines indicate the position of the cross section shown in (d). (b) SEM micrographs of Arabidopsis gynoecium from stages 6 to 14. (c) A mature Arabidopsis fruit at stage 17 showing the full differentiation of distinct tissues. (d) Cross-section of the gynoecium at stage 7, 10, 13, and 16. For stage 13 and 16 samples, both the ovary and style were included for comparison of the symmetry. i: inflorescence meristem; the numbers indicate the developmental stages. Scale bars = 100 μm.

Figure 2. 

Complex GRNs underlie gynoecium patterning and fruit development in Arabidopsis. (a) A longitudinal section of a stage 11/12 Arabidopsis gynoecium showing the differentiation of complex tissues along the proximal-distal axis. The auxin gradient along the proximal-distal axis is shown by a triangular red gradient. (b) GRNs and the hormone dynamic patterning the gynoecium apical region. (c) Auxin and cytokinin signaling distribution pattern during gynoecium development from stage 6 to 12. (d) GRNs governing the differentiation of medial-lateral axis of Arabidopsis gynoecium. (e) GRNs and the hormone dynamic controlling the dehiscence zone differentiation. (f) GRNs controlling the cell differentiation responsible for seed abscission.

Figure 3. 

Expression patterns of the genetic factors involved in gynoecium patterning. A visual depiction of the expression patterns of genetic factors involving in the development and specification of gynoecium tissues. Longitudinal and cross sections of the gynoecium at stages 6, 10, and 13 are shown. Expression is indicated by the red color exclusively within the gynoecium tissues (gene expression patterns are derived from original research articles; the relevant sources can be found in Table 1).