Which protein(s) is/are most directly and physically involved in turning on gene expression for the transition to flower production?

Question

Quizplus · Accepted Answer

FT is a florigen protein that is synthesized in the leaves and moves to the shoot apical meristem, where it interacts with FD, a transcription factor. The FT/FD complex then activates the expression of AP1, which is a key gene that promotes the transition from vegetative growth to flowering. Therefore, both FT and FD are most directly and physically involved in turning on gene expression for flower production. CO also plays a role in the process by regulating the expression of FT. However, it is not as directly involved in activating the expression of the key floral gene, AP1, as FT and FD are.

Which Protein(s) Is/are Most Directly and Physically Involved in Turning