Fig. 8. Reduced amounts of heterochromatin in AtMSI1-CS plants. (A) Phenotypes of representative DAPI-stained petal interphase nuclei. Chromocentres are smaller and staining is weaker in AtMSI1-CS than in wild-type nuclei. (B) Quantification of observations shown in A. Number of chromocentres (left), relative nuclear size (middle) and the ratio of euchromatin: heterochromatin (right) are plotted for wild type and AtMSI1-CS. Shown are the mean±s.e.m. of 40 nuclei each.