FT and florigen long-distance flowering control in plants

Area of Science:

• Plant Biology
• Molecular Genetics
• Developmental Biology

Background:

• The long-standing search for florigen, a universal flowering regulator, led to the identification of FT-like proteins.
• FT-like proteins are small, globular phosphatidylethanolamine-binding (PEBP) proteins crucial for flowering regulation.

Purpose of the Study:

• To elucidate the molecular mechanisms underlying FT protein function and movement.
• To explore the application of FT-like genes in accelerating tree breeding by reducing the juvenile phase.

Main Methods:

• Identification of genes regulating Arabidopsis FT protein movement.
• Characterization of specific FT protein features essential for florigen activity.

Main Results:

• FT-like proteins have been confirmed to act as potent flowering stimulators, moving to the shoot apex.
• Genes controlling FT protein movement and key functional features have been identified in Arabidopsis.
• FT-like genes show potential for reducing the long juvenile phase in trees, enabling faster breeding.

Conclusions:

• FT-like proteins are the long-sought florigen, playing a critical role in plant flowering.
• Understanding FT protein function opens avenues for genetic manipulation to control flowering time and accelerate crop and tree improvement.