Formation of The Floral Meristem or The Inflorescence
The meristem can be defined as the tissue or group of plant tissues that contain undifferentiated stem cells, which are capable of producing any type of cell tissue. Their maintenance and development, both in the vegetative meristem or the meristem of the inflorescence is controlled by genetic cell fate determination mechanisms. This means that a number of genes will directly regulate, for example, the maintenance of the stem cell’s characteristics (gene WUSCHEL or WUS), and others will act via negative feedback mechanisms in order to inhibit a characteristic (gene CLAVATA or CLV). In this way both mechanisms give rise to a feedback loop, which along with other elements lend a great deal of robustness to the system. Along with the WUS gene the SHOOTMERISTEMLESS (STM) gene also represses the differentiation of the meristematic dome. This gene acts by inhibiting the possible differenciation of the stem cells but still allows cell division in the daughter cells, which, had they been allowed to differentiate, would have given rise to distinct organs.
Read more about this topic: ABC Model Of Flower Development
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