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UPSC » Daily News Analysis ‘RNA-based Antiviral Technology Offers Defense Against Cucumber Mosaic Virus (CMV)’ : 28 April

Daily News Analysis ‘RNA-based Antiviral Technology Offers Defense Against Cucumber Mosaic Virus (CMV)’ : 28 April

Table of Content

What is Cucumber Mosaic Virus (CMV)?

CMV infects over 1,200 plant species, including bananas, cucumbers, melons, cereals, and medicinal plants.
It is transmitted by aphids and causes mosaic discoloration, stunted growth, and commercially unviable fruits.
In India, CMV leads to 25–30% yield loss in bananas and up to 70% loss in crops like pumpkin and melon.

Role of RNA-Based Antiviral Technology:

It uses RNA silencing, a natural plant defense where small interfering RNAs (siRNA) help destroy viral RNA.
Scientists designed effective dsRNA enriched with powerful siRNA to enhance the immune response.
Plants treated with this method showed up to 80% lower viral load and stronger, targeted immunity.
This approach is more precise, stronger, and quickly adaptable to new viral strains.
Future applications may extend to other plant viruses, fungal diseases, and insect pests.

Meaning of Key Terms

RNA silencing is a natural process in living organisms where small RNA molecules block or destroy specific RNA, so that certain genes are turned off or their activity is reduced.
siRNA (small interfering RNA): It is a tiny piece of RNA made by the cell to find and destroy matching viral or unwanted RNA. Its main job is to silence harmful genes or viruses by cutting their RNA into pieces.
dsRNA (double-stranded RNA): It is two strands of RNA joined together, similar to a ladder. Cells often recognize dsRNA as a sign of virus infection and trigger defense actions like RNA silencing.

Why in News?

Researchers at Martin Luther University Halle-Wittenberg developed an RNA-based antiviral that provides strong protection against cucumber mosaic virus (CMV), responsible for major crop losses.