Fig. 2. pol pll1 mutations are epistatic to clv3. Mean number of organs from flowers of grafted pol pll1 in the er^-, ER⁺ and clv3-2 backgrounds, wus-1 and clv3-2 mutants, and wild-type Ler plants. Error bars indicate standard error of the mean (s.e.m.). At least 50 flowers were counted for each mean.