Abstract
DNA fragmentation with length corresponding to multiple integer of approximately 180 base pairs is a distinct feature of apoptosis in animals and programmed cell death in plants. This feature can simply be detected by DNA gel electrophoresis followed by ethidium bromide staining, although in some cases it is difficult to distinguish the DNA laddering. We herein describe a protocol to detect a programmed cell death-associated DNA laddering of plant tissues. After agarose-gel electrophoresis of genomic DNA, Southern hybridization using DIG-labeled genomic DNA probe is performed, that improves detection of DNA laddering.
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