Additional file 1.

Figure S1. p5cs1 p5cs2/P5CS2 anther stained with Alexander’s stain. Close up of a p5cs1 p5cs2/P5CS2 anther stained with Alexander’s stain. The small and misshaped pollen grains are clearly visible, within a p5cs1 p5cs2/P5CS2 anther, as non-stained pollen pollen grains alongside wild type-like, red stained, pollen grains. Bar = 50 μm.

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Mattioli et al. BMC Plant Biology 2012 12:236   doi:10.1186/1471-2229-12-236