Synergistic effects of GmLFYa and GmLFYb on Compound Leaf Development in Soybean

Area of Science:

• Plant biology
• Developmental genetics
• Legume research

Background:

• Compound leaf development in legumes involves complex regulatory mechanisms.
• KNOXI genes are crucial for leaflet initiation in most compound-leaved angiosperms.
• The role of LFY genes in leaf development is understood in IRLC legumes but not in non-IRLC legumes like soybean.

Purpose of the Study:

• To analyze soybean trifoliate leaf development.
• To characterize the roles of two GmLFY gene copies (GmLFYa and GmLFYb) in compound leaf morphogenesis.
• To investigate the function of GmLFY genes in floral development.

Main Methods:

• Analysis of loss-of-function mutants for GmLFYa and GmLFYb.
• Creation and study of Gmlfya Gmlfyb double mutants.
• Comparative analysis of floral development phenotypes.

Main Results:

• Gmlfya mutants showed a low frequency of simple-like leaves; Gmlfyb mutants had no visible phenotype.
• Gmlfya Gmlfyb double mutants predominantly displayed simple-like leaves.
• Mutations affected floral development, with double mutants forming inflorescence-like structures.

Conclusions:

• Two GmLFY genes in soybean collaboratively regulate compound leaf and flower morphogenesis.
• LFY orthologs act as master regulators in compound leaf development across diverse legume taxa.
• This study provides foundational mutant materials for future soybean research.