TY - JOUR AU - Haughn, G. W. AB - Abstract We have examined the floral morphology and ontogeny of three mutants of Arabidopsis thaliana, Ap2-5, Ap2-6, and Ap2-7, that exhibit homeotic changes of the perianth organs because of single recessive mutations in the AP2 gene. Homeotic conversions observed are: sepals to carpels in all three mutants, petals to stamens in Ap2-5, and petals to carpels in Ap2-6. Our analysis of these mutants suggests that the AP2 gene is required early in floral development to direct primordia of the first and second whorls to develop as perianth rather than as reproductive organs. In addition, our results support one of the two conflicting hypotheses concerning the structures of the calyx and the gynoecium in the Brassicaceae. This content is only available as a PDF. © 1989 by American Society of Plant Biologists This article is published and distributed under the terms of the Oxford University Press, Standard Journals Publication Model (https://academic.oup.com/journals/pages/open_access/funder_policies/chorus/standard_publication_model) TI - AP2 Gene Determines the Identity of Perianth Organs in Flowers of Arabidopsis thaliana. JF - The Plant Cell DO - 10.1105/tpc.1.12.1195 DA - 1989-12-01 UR - https://www.deepdyve.com/lp/oxford-university-press/ap2-gene-determines-the-identity-of-perianth-organs-in-flowers-of-QOC4HNl8ze SP - 1195 EP - 1208 VL - 1 IS - 12 DP - DeepDyve ER -