Induction of Antiviral Resistance in Nicotiana glutinosa Plants by treatment with Trichothecium Polysaccharide and its reversal by Actinomycin D

Trichothecium polysaccharide induced local and systemic resistance to infection by tobacco mosaic virus when applied to Nicotiana glutinosa leaves two days before virus inoculation. The resistance induced by 2.5 mg/ml of the polysaccharide was approximately halved by simultaneous application of 10 µg/ml actinomycin D.