Dysfunction of GmVPS8a causes compact plant architecture in soybean

Area of Science:

• Plant Biology
• Molecular Biology
• Genetics

Background:

• Vacuolar Protein Sorting 8 (Vps8) is a key component of the CORVET complex in yeast, essential for endosomal trafficking.
• The role of Vps8 in plant vegetative growth and development is not well understood.

Purpose of the Study:

• To investigate the function of GmVPS8a in soybean (Glycine max) plant architecture.
• To elucidate the molecular mechanisms underlying GmVPS8a's role in plant development.

Main Methods:

• Map-based cloning to identify the causative gene in a soybean mutant with compact architecture.
• CRISPR/Cas9 gene editing in soybean and gene silencing in tobacco (Nicotiana benthamiana) to validate gene function.
• Transcriptomic and proteomic analyses to identify affected pathways.

Main Results:

• A soybean mutant (T4219) with a premature stop codon in GmVPS8a exhibited a compact plant architecture.
• Engineered mutations and gene silencing confirmed GmVPS8a's role in plant growth and architecture.
• GmVPS8a dysfunction impacts auxin signaling, sugar metabolism, and lipid metabolism pathways.

Conclusions:

• GmVPS8a plays a conserved role in plant vegetative growth and architecture across species.
• Understanding GmVPS8a function offers potential for improving ideal plant architecture in soybean and other crops through genetic breeding.