Aphidicolin sensitivity assay and DNA levels in wild type, gebp gpl1,2,3 quadruple mutant, cpr5-2, and gebp gpl1,2,3 cpr5 quintuple mutant. A, Aphidicolin sensitivity assay. Plants were grown in vitro for 3 weeks in the absence (−) or presence (+) of aphidicolin (12 μg mL−1). Scale bars: 5 mm. B, Distribution of nuclei according to DNA content in cells of third rosette leaves. [See online article for color version of this figure.]