Isolation of the virus inhibitor from the root extract of Boerhaavia diffusa inducing systemic resistance in plants

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Abstract
An antiviral agent, active against spherical and tubular viruses in hypersensitive and systemic hosts, was isolated from the roots of B. diffusa. Partial purification of inhibitor by organic solvents, Sephadex gel and protein precipitants was achieved. The inhibitor may be a glycoprotein with a MW of 16,000-20,000 daltons.