Extracellular vesicles associate with infectious geminiviral particles in the apoplast of infected plants.
Morales-Martinez, P.; Cana-Quijada, P.; Koch, B. L.; Marulanda-Pulgarin, J.; Lozano-Duran, R.; Innes, R. W.; Bejarano, E.; Castillo, A. G.
Plant Signaling
Geminiviruses destroy millions of tons of tomatoes, peppers, beans, and squash every growing season — and this finding reveals a hidden transport system the virus hijacks that we never knew to target with disease control.
Plants naturally release tiny bubble-like packages called extracellular vesicles into the spaces between their cells — think of them as the plant's internal mail system. Scientists found that when a plant is infected with geminiviruses (the culprits behind diseases that devastate vegetable crops), these bubbles get hijacked and stuffed with complete, working virus particles. When those vesicle packages were transferred to healthy plants, the healthy plants got infected — proving this is a real alternate route the virus uses to get around.
Key Findings
Extracellular vesicles isolated from geminivirus-infected plants contained complete viral genomes plus both capsid (shell) and movement proteins — all components needed for infection.
These vesicle fractions were proven infectious: mechanical inoculation onto naive (healthy) plants successfully transmitted the disease.
This represents a newly identified movement pathway beyond the canonical plasmodesmata-based route, potentially relevant to how the virus crosses membrane barriers in insect vector hosts.
chevron_right Technical Summary
Researchers discovered that tiny membrane-wrapped packets naturally secreted by plants can carry complete, infectious geminivirus particles — suggesting these vesicles may be an overlooked route by which the virus spreads through plants and potentially to insect vectors.
Abstract Preview
Plant viruses have evolved diverse strategies to facilitate their movement and survival within the host. Among them, geminiviruses co-opt host cellular machinery to replicate and disseminate. Tradi...
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