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Fig. S1 Loss of REPRESSOR OF ga1-3 (RGA) and GIBBERELLIN INSENSITIVE (GAI) causes infertility in the Col-0 background.

Fig. S2 Effect of gibberellin (GA) treatment on silique set and floral organ growth.

Fig. S3 Comparison of gid1a-1 gid1b-1 gid1c-1 and gid1a-1 gid1b-1 gid1c-2 phenotypes.

Fig. S4 The Ler DELLA global mutant retains pollen viability.

Fig. S5 Loss of ERECTA (ER) in the rga-28 gai-td1 (Col-0) background phenocopies the Ler growth habit.

Fig. S6 Additional anther and pollen phenotypes of rga-28 gai-td1.

Fig. S7 Reverse transcription-polymerase chain reaction (RT-PCR) analysis of REPRESSOR OF ga1-3-green fluorescent protein (RGA-GFP) expression in LTP12::RGA::GFP and LAT52::RGA::GFP transgenic lines.

Fig. S8 Vegetative and reproductive phenotypes of LTP12::RGA::GFP and LAT52::RGA::GFP transgenic lines.

Fig. S9 Fluorescence analysis of LTP12::RGA::GFP and LAT52::RGA::GFP expression.

Fig. S10 Genetic analysis of rga gai gid1 vegetative phenotypes.

Table S1 PCR primer sequences

Table S2 Col-0 and Ler respond differently to chemical and genetic gibberellin (GA) overdose

Table S3 Modelling the effect of gibberellin (GA) treatment on floral organ growth in wild-type Col-0

Table S4 Expression of gibberellin (GA) biosynthetic and signalling genes during wild-type Ler pollen development

Methods S1 Non-linear modelling of floral organ growth.