Figure 1.

The NO Scavenger cPTIO Promotes PCD in H. vulgare Aleurone Layers.

Freshly prepared aleurone layers were treated with ABA or GA. cPTIO (200 μM) alone or with the NO donor SNP (100 μM) was added to some layers 18 h later. Data represent the mean of ∼300 cells in each of 12 aleurone layers. The data are pooled from two independent experiments, both of which showed similar results. Means that are significantly different at the level of P = 0.05 in a Student's t test are indicated by different numbers of asterisks.