INTERMEDIARY WITH OUTSIDE. “The term “floral pathway integrator” (FPI) was introduced to describe genes that upregulate the meristem identity genes, and whose expression is regulated by flowering pathways that sense environmental or developmental cues (i.e. changes in the expression of the FPI genes serve to integrate the different flowering inputs.”
https://www.sciencedirect.com/science/article/pii/S0168952510001873