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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.
