Current Frontiers of Nanotechnology-Enabled Strategies for Detection of Plant Viruses

By providing improved sensitivity, specificity, and versatility to various detection systems, nanoparticles have totally changed the field of plant viral diagnostics. Their one-of-a-kind physicochemical features like large surface area, optical properties, and adjustable surface chemistry have opened up the door for the creation of rapid, affordable, and on-site diagnostic devices. Among nanoparticle biosensors, security for machines that are the main tool in the fight against the entry of invasive pests into the agro-industry and high-value plant production, is becoming one of the issues that worry the application of the node sector market for the rapid and simple implementation of monitoring systems. The origination of the epidemic of agro-viruses is due, among other things, to climate change and international trading with new pathogen profiles. As a result, techniques based on metal nanoparticles such as surface plasmon resonance, fluorescence, and Raman scattering are now used to develop sensors with a high degree of accuracy and sensitivity. Researchers have successfully created a new method for the direct synthesis of magnetic nanoparticles by chemical vapor deposition on iron-based substrates. Using this method, the inner structure of the particle can be completely controlled, therefore improving diagnostic device efficiency and reliability. Quantum dots and carbon-based nanomaterials are characterized by better sensitivity, emission multiplex, and flexibility of field application; yet, toxicity and price hinder their use. Nanoparticles are also provided with better selectivity and extended applicability due to functional groups such as aptamers, antibodies, and molecularly imprinted polymers (MIPs). Exceptionally accurate viral monitoring is now available with colorimetric assays, Förster Resonance Energy Transfer (FRET), electrochemical sensors, and Surface-Enhanced Raman Scattering (SERS). The present range is characterized by problems with scaling, sample specificity in complex samples, and uniformity, but these limitations are changing quite rapidly due to the progress in automation, microfluidics, real-time sensing, and green synthesis. By continuous developments of nanoparticle-based technologies, assisted by interdisciplinary and open-ended research, future diagnostic technologies will be born. Moreover, innovations not only will improve the effectiveness of the management of plant diseases but also will become a significant source of food security and the potential of agro-systems for overcoming new infestations.