MALDI-TOF MS technique as a new approach for simultaneous detection and differentiation of potato virus Y strains

Area of Science:

• Plant Virology
• Analytical Chemistry
• Molecular Biology

Background:

• Potato virus Y (PVY) exhibits high variability, making it a suitable model for developing advanced detection and strain differentiation techniques.
• Accurate identification of PVY strains is crucial for effective disease management in agriculture.

Purpose of the Study:

• To pioneer the application of Matrix-Assisted Laser Desorption/Ionization Time-of-Flight Mass Spectrometry (MALDI-TOF MS) for identifying distinct PVY strains.
• To assess the efficacy of MALDI-TOF MS in differentiating PVY^O, PVY^NTN, and PVY^N-Wi strains using various sample preparations.

Main Methods:

• Preparation and characterization of genomic, protein, and whole-virus samples from PVY strains.
• MALDI-TOF MS analysis of prepared samples, focusing on protein extracts in the LP 2-20 kDa mode.
• Statistical analysis including Principal Component Analysis (PCA) and Mann-Whitney U-test to evaluate spectral differentiation and accuracy.

Main Results:

• MALDI-TOF MS generated distinct spectral signatures for each PVY strain, enabling successful identification.
• Protein extracts showed high spectral richness, with statistically significant differentiation (p < 0.05) observed for PVY^N-Wi and PVY^O strains.
• MALDI-TOF MS identified PVY strains down to 0.001 mg/mL, demonstrating high sensitivity.

Conclusions:

• MALDI-TOF MS is a pioneering and effective method for the simultaneous detection and identification of PVY strains.
• The distinct spectral profiles obtained via MALDI-TOF MS allow for robust differentiation between PVY strains.
• This technique offers a promising advancement for rapid and accurate viral strain analysis in plant pathology.