On-Site Visualization and Sensing Platform for Detecting Genetically Modified Papaya "55-1" in Papaya-Derived...

Area of Science:

• Biotechnology
• Agricultural Science
• Molecular Biology

Background:

• Genetically modified (GM) papaya '55-1' is the first cultivar resistant to Papaya ringspot virus (PRSV).
• Accurate and rapid detection methods are crucial for regulatory oversight and consumer information.
• Existing methods like PCR can be time-consuming and require specialized laboratory equipment.

Purpose of the Study:

• To establish a rapid, on-site, and visual detection platform for GM papaya '55-1'.
• To ensure accurate identification of '55-1' in various papaya-derived products.
• To provide a technical reference for detecting other GM crops.

Main Methods:

• Development of an on-site visualization and sensing platform utilizing recombinase polymerase amplification (RPA).
• Testing the platform's specificity and sensitivity using samples containing known amounts of '55-1'.
• Validation of the platform's performance by comparing results with traditional polymerase chain reaction (PCR) analysis.

Main Results:

• The RPA-based platform exclusively detected '55-1', demonstrating high specificity.
• A low detection limit of 20 copies confirmed high sensitivity.
• The entire detection process was completed within 40-60 minutes, showcasing high efficiency.
• Results from the on-site platform were consistent with PCR analysis in detecting '55-1' in papaya leaves and derived products.

Conclusions:

• The developed RPA platform enables rapid, on-site, and visual detection of GM papaya '55-1'.
• This method offers a sensitive, specific, and efficient alternative to conventional detection techniques.
• The platform serves as a valuable tool for regulatory bodies and the food industry, and a model for GM plant detection.