Gene-transfer vector comprising helper-component protease gene of papaya ringspot virus for broad-spectrum virus resistance in crops and use thereof

摘要

Provided is a recombinant plasmid having a control sequence and a coding sequence fragment of Papaya ringspot virus (PRSV) helper-component protease gene (HC-Pro gene) operably linked to the control sequence. A recombinant microorganism derived therefrom is also provided. A method for providing plants with resistance against virus is also provided. Use of PRSV HC-Pro gene or fragment thereof in generating plants with resistance against virus is also provided. It is proven that the PRSV HC-Pro transgenic plants can solve the problem resulting from breakdown by gene silencing suppression and provide broad-spectrum resistance to various PRSV strains of different geographical origins.