Involved in floral organogenesis. May play a protective role in flowers by protecting the reproductive organs from potential pathogen attack. Possibly the cell wall or vacuole. Flower. Found in petals, stamen and pistils, but not in sepals. In particular, accumulation in a configuration surrounding the inner reproductive whorls. Accumulates in developing flowers and its level drops as flowers mature. Belongs to the DEFL family. Was initially thought to be a thionin.