Possible working model depicting how the clock module LgPRR7-LgFKF1 may regulate flowering in Luculia gratissima. (IMAGE)
Caption
Possible working model depicting how the clock module LgPRR7-LgFKF1 may regulate flowering in Luculia gratissima. The expression of LgPRR7 and LgFKF1 is controlled by the photoperiod, and the LgPRR7–LgFKF1 protein complex reinforces its own stability via a positive feedback loop that amplifies LgPRR7 and LgFKF1 expression. The LgPRR7-LgFKF1 complex indirectly activates LgCOL12 while repressing LgRGL2 expression. The LgFKF1 protein further recruits LgCOL12 and LgRGL2 to form the LgFKF1–LgCOL12–LgRGL2 complex, which negatively regulates the expression of LgFT, LgLFY, and LgAP1, thereby fine-tuning flowering in L. gratissima. In addition, GA is possibly involved in this process through LgRGL2. Squares and circles indicate genes and proteins, respectively. The arrows and T-shaped bars represent positive and negative regulation, respectively. The solid and dashed lines indicate direct and hypothetical/indirect relationships between the two points, respectively.
Credit
Horticulture Research
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