Abstract
In this review are presented some emerging methods to improve virus resistance in transgenic plants, based on the use of nonviral genes from various organisms. The genes discussed include ones coding for proteins involved in virus resistance: antibodies, PKR kinase and 2′-5′ oligoadenylate synthase from mammalian cells; the yeast SKI antiviral genes. Genes not clearly involved in resistance are also described, including ones encoding protease inhibitors or ribosome-inactivating proteins. The natural pathways for pathogen resistance in plants may also be enhanced, through modification of genes involved in the hypersensitive response, systemic acquired resistance, or nonhost and extreme resistance.
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