Buds have to be named instead of seeds since they, too, represent a resting state that has to be surmounted by an interaction of exogenous and endogenous factors. It describes the alternative developmental path of a certain organ. He assumed that the development was caused by a 'raw sap' that would increasingly be purified so that new organs could develop. He named the replacement of stamens by petals that can be observed in 'filled' flowers as an example. Gardeners have at all times invested a lot of work to select such varieties.
Homeotic genes act as switches at the level of transcription.
They activate a set of genes required for the development of a certain organ en bloc . It seemed to suggest itself to search for homeotic genes in plants, too. Under laboratory conditions takes one generation a mere 4 - 5 weeks, it does not need much space, and it has one of the smallest plant genomes known. It is rather simple to yield a variety of mutants with an altered hormone metabolism or altered developmental steps. At the time being work several research teams intensively at the complete elucidation of its nucleotide sequence and it can well be assumed that the work will be finished soon with the first complete genetic information of a plant genome.