Figure 3.

rga gai (Arabidopsis thaliana Ler) mutants retain male fertility. (a–f) Floral phenotypes of wild-type Ler,rga-24 gai-t6 and rga-t2 gai-t6, showing newly opened flowers (a–c) and whole anthers (d–f). Anthers have been stained to determine pollen viability: dark red colouring indicates viable pollen. Black arrowheads indicate empty locules. (g) Primary inflorescence phenotypes of er-105 rga-28 gai-td1 combinatorial mutant lines. White arrowheads indicate infertile silique positions. (h–o) Floral phenotypes of mutants described in (g), showing newly opened flowers (h–k) and whole anthers (l–o). Anthers have been stained to determine pollen viability: dark red colouring indicates viable pollen. Black arrowheads indicate empty locules.