Abstract
Sarracenia purpurea is a carnivorous plant historically used to treat smallpox infections. Our previous data found S. purpurea had broad spectrum antiviral activity in vitro. S. purpurea is one of several hundred identified carnivorous species of plants. Carnivorous plants have evolved through convergent evolution in at least ten independent events, usually in response to harsh environments where nutrition from prey is required for growth. These prey are known vectors of plant viruses that might introduce novel biotic stressors and defense pathways in carnivorous plants. This study evaluated the antiviral activity of several non-carnivorous and carnivorous plants from four evolutionarily distinct clades. Results demonstrated that carnivorous plants have evolved antiviral activity, a trait that is not present in related species of non-carnivorous plants. The antiviral trait may be due to the plant-prey relationship with insect vectors and an evolutionary need for carnivorous plants to have more robust antiviral defense systems.
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