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Fig. 2. ett and arf4 mutations suppress the zip
phenotype. Photographs of 11-day-old plants showing the effect of
ett-15, ett-7 and arf4-2 on leaf shape. In a wild-type
background, these mutations cause a slight rounding and flattening of the
first two leaves. In a zip background, they partially suppress the
elongation of the lamina and the epinasty that results from the premature
expression of adult traits in this mutant.