= Floral organ identity
<Floral organ identity> is the developmental identity of a floral structure, such as a <sepal>, <petal>, <stamen> or <carpel>. It concerns what kind of <organ> develops, not merely its position or final size. The <ABC model of flower development> describes identities through combinations of regulatory functions in overlapping domains.
Genetic perturbation tests these assignments. Loss of the relevant SEPALLATA functions in <Arabidopsis thaliana> disrupted the normal B- and C-function specification of floral <organs>, showing that the simple letter combinations require additional molecular partners. <B and C floral organ identity functions require SEPALLATA MADS-box genes by Soraya Pelaz and others>[2000, mutant floral-organ transformations and genetic requirement for SEPALLATA genes]{ref} An <organ> appearing in another position and an <organ> changing its developmental identity are different outcomes. <Organ> shape alone also need not reveal which regulatory interaction changed.
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