Fig. 6. Effect of seu-3 on the auxin regulatory mutant pid-1. (A) pid-1 inflorescence showing flowers with large, supernumerary petals that are occasionally fused (arrow). (B) pid-1 flower showing gynoecium with an infrequent ovary that, like ett ovaries, is reduced in size (arrows indicate top and bottom of single valve). (C) Top-down view of pid-1 seu-3 inflorescence showing naked gynoecia. A swollen ring of tissue appears in place of the outer whorl organs. Rarely, a sepal originates from this band of tissue (arrow). (D) Side view of pid-1 seu-3 inflorescence showing that the swollen tissue in C is continuous with the pedicel. Occasionally there is a less defined boundary between the pedicel and the gynoecium (arrowhead). (E) pid-1 seu-3 gynoecium that resembles pid-1 single mutant gynoecium, a stalked organ without valves. Two filamentous outer whorl organs are apparent. (F) pid-1 seu-3 gynoecium that is split into multiple stigma-capped stalks. Although no valves have differentiated, the gynoecium still produces ovules (arrowhead). Genotypes described are in Ler.