Nanogold-Lateral Flow Assay for Ginseng DNA Differentiation

Area of Science:

• Botany
• Molecular Biology
• Biotechnology

Background:

• Accurate identification of ginseng species (e.g., Panax ginseng, Panax quinquefolius) is vital for medicinal and commercial applications.
• Existing differentiation methods may be insufficient for industrial-scale quality control.

Purpose of the Study:

• To develop a rapid and reliable method for distinguishing between different ginseng species.
• To leverage DNA hybridization based on single-nucleotide polymorphism (SNP) for ginseng identification.

Main Methods:

• Genomic DNA extraction from ginseng root samples.
• Polymerase chain reaction (PCR) amplification to generate DNA fragments flanking the target SNP.
• DNA hybridization using probes immobilized on a nitrocellulose membrane, visualized via a spot test and lateral flow assay.

Main Results:

• Successful demonstration of a DNA spot test for ginseng identification.
• Development and validation of a DNA lateral flow assay capable of differentiating ginseng species.
• Detection of approximately 3 nanograms of PCR amplicons in 1 microliter of sample.

Conclusions:

• Ginseng DNA differentiation is achievable using a DNA lateral flow assay.
• The developed assay provides a sensitive and specific method for identifying ginseng species.
• This method offers a valuable tool for industrial and commercial quality control of ginseng products.