Figure 2.

Comparison of Morphological and Cell Death Phenotypes of the sfd ssi2 npr1 Mutants.

(A) Comparison of the morphology of 4-week-old npr1, ssi2 npr1, sfd1-1 ssi2 npr1, sfd1-2 ssi2 npr1, sfd2-1 ssi2 npr1, sfd2-1/+ ssi2 npr1, sfd2-2 ssi2 npr1, and sfd4 ssi2 npr1 plants. The sfd2-1/+ ssi2 npr1 plant is heterozygous for the sfd2-1 mutant allele. All plants were photographed from the same distance.

(B) Light microscopy of trypan blue–stained leaves from npr1, ssi2 npr1, sfd1-1 ssi2 npr1, sfd2-1 ssi2 npr1, and sfd4 ssi2 npr1 plants. The arrows mark areas containing intensely stained dead cells in ssi2 npr1. All photographs were taken at the same magnification.