Optimizing an Ex Vitro RUBY-Equipped Method for Hairy Root Transformation of Peanuts: An Efficient Approach for the...

Area of Science:

• Plant molecular biology
• Genetics and genomics
• Biotechnology

Background:

• Agrobacterium rhizogenes-mediated transformation is crucial for root gene functional analysis.
• Current methods for selecting transformed roots are often complex and time-consuming.
• A simplified and efficient transformation protocol is needed for peanut research.

Purpose of the Study:

• To develop a simplified and efficient Agrobacterium rhizogenes-mediated hairy root transformation method for peanut.
• To enable direct visual selection of transformants using the RUBY marker.
• To validate the method's utility for gene functional studies in peanut.

Main Methods:

• Agrobacterium rhizogenes-mediated transformation of young peanut shoots.
• Utilized an expression vector containing the RUBY gene for visual selection.
• Overexpressed the AhLRX6 gene in induced hairy roots.
• Analyzed transformant frequencies and observed phenotypic changes.

Main Results:

• Achieved high-efficiency gene transformation in peanut hairy roots, with frequencies ranging from 46.2% to 73.7%.
• Direct visual selection of transformants was successfully implemented using the RUBY marker.
• Preliminary results showed overexpression of AhLRX6 led to thicker cell walls in root tips compared to wild-type (WT).

Conclusions:

• The developed method offers a simplified, high-efficiency approach for Agrobacterium rhizogenes-mediated hairy root transformation in peanut.
• This technique facilitates direct visual selection, streamlining the process of gene functional analysis.
• The method is suitable for investigating gene functions, as demonstrated by the preliminary study on AhLRX6.