Figure 5.

NO was required for leaf cell death. A to D, Both 10-d-old wild type (WT) and noe1 seedlings cultivated under low light (400 μmol m⁻² s⁻¹) were transferred to high light (1,600 μmol m⁻² s⁻¹). Leaf symptoms and relative cell death (percentage of total leaf area) are given for wild-type and noe1 seedlings induced by the addition of 200 μm PTIO (an NO scavenger) and 2.5 mm SNP (an NO donor) for 2 d after treatment (DAT; A and B) and 5 DAT (C and D) under high light. E, Effects of 200 μm PTIO and 2.5 mm SNP on relative cell death of wild-type and noe1 suspension cell cultures. These data were obtained from three independent replicates.