Figure 3From: Callose (β-1,3 glucan) is essential for Arabidopsispollen wall patterning, but not tube growthCALS5 is expressed in mature pollen and pollen mother cells. Northern blot of mRNA isolated from various tissues and probed with CALS5 and EF1α (a). In situ hybridization of pollen mother cells (pm) within sectioned anthers (b-c); CALS5 anti- sense (b) and sense probe (c). Bar, 100 μm.Back to article page