A simple widely applicable hairy root transformation method for gene function studies in medicinal plants.

Area of Science:

• Plant Molecular Biology
• Medicinal Plant Biotechnology
• Genetic Engineering

Background:

• Genetic transformation is crucial for medicinal plant research.
• Developing plant-specific transgenic technologies is time-consuming.
• A simplified, widely applicable transformation method is needed.

Purpose of the Study:

• To develop a simple, rapid, and widely applicable hairy root transformation method for medicinal plants.
• To enable fast gene functional studies in diverse medicinal species.
• To validate the method for studying gene function in Glycyrrhiza uralensis.

Main Methods:

• Utilized Agrobacterium rhizogenes strain K599 and the RUBY reporter system.
• Applied the method to six medicinal plant species across four families.
• Investigated the in planta function of two Glycyrrhiza uralensis UGTs (GuUGT1 and GuUGT10).

Main Results:

• Successfully generated transgenic hairy roots in six medicinal plant species without sterile conditions.
• Demonstrated that GuUGT1 overexpression and knockout significantly altered liquiritin and isoliquiritin accumulation in Glycyrrhiza uralensis.
• Showed GuUGT10 had no significant effect on these compounds.

Conclusions:

• The described hairy root transformation method is simple, rapid, and broadly applicable to medicinal plants.
• This method facilitates efficient gene function analysis in planta.
• The study provides insights into the roles of GuUGT1 and GuUGT10 in licorice secondary metabolism.