Figure 3.

Oligonucleosomal Cleavage of Total DNA in Florets of the Fertile and Sterile Sunflower Lines.

Agarose gel electrophoresis of total DNA stained with ethidium bromide. The developmental stages correspond to those stages used for the TUNEL assay (Figure 2). Pre, premeiosis; Mei, meiosis; Tet, tetrad stage.