Figure 4: Visible Phenotype of the ppi1 Mutant

Typical wild-type and plastid protein import 1 (ppi1) mutant Arabidopsis plants (left and right, respectively). The ppi1 mutant is null for the chloroplast translocon component, atToc33. The plants were grown side-by-side under identical conditions for about three weeks. The yellow-green phenotype of the ppi1 mutant is due to defective import of photosynthesis-related preproteins, and is particularly apparent in younger leaves. Taken from Science, 1998, 282: 100-103.