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Fig. 3 | BMC Biology

Fig. 3

From: Arabidopsis PRC1 core component AtRING1 regulates stem cell-determining carpel development mainly through repression of class I KNOX genes

Fig. 3

Indeterminate carpel development in atring1a;atring1b mutant. a Wild-type (WT) carpel. bd Defective carpel development in atring1a;atring1b mutant. b Bulged carpels. c Stigma papilla-like structures growing outside the replums between carpels. d Unclosed carpel development. eh Cross sections of various stages of carpel and ovule development in WT flower. e Ovule primordia initiation within the gynoecial cylinder of a stage 8 WT flower. f Gynoecial cylinder in a stage 9 WT flower. g Gynoecial cylinder in a stage 11 WT flower. h Mature ovule within a stage 13 WT flower. im Cross sections of various stages of carpel and ovule development in atring1a;atring1b mutant. Medial ridges fail to fuse but continue to expand and produce stigmatic papilla-like tissues on the top. Arrows denote various stages of ovules. np SEM observation of ectopic carpelloid features inside mutant mature gynoecia. n Ectopic additional ovules arising from overproliferated carpel-like structure inside the mutant central gynoecium. o Carpelloid-like ovules with stigma papilla-like organs (arrowheads) on the top. p Overproliferating carpel-like structures crowded inside a gynoecium. Bars =200 μm, except 10 μm in el

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