Manipulation of Host Genes for Plant Protection

Manipulation of Host Genes for Plant Protection

Manipulation of Host Genes for Plant Protection
Several stable dominant resistant genes have been introduced into commercial crops from native gene pool in conventional plant breeding. Some examples are the TMV-resistant Tm family genes introduced into cultivated tomato from the native species Lycopersicum peruvianum and the N genes of Nicotiana spp conferring resistance to TMV virus. The latter gene has been transferred from N. glutinosa to several tobacco cultivars thereby creating transgenic viral resistant tobacco plants.

Similarly, the presence of a ribosomal binding antiviral protein (PAP) in Phytolocca spp. has been exploited to create transgenic tobacco (N. benthamiana) and potato plants and such protection in transgenic plants against some viruses were discernible in plants having PAP less than 5ng/mg. Many of these genes conferring resistance appear to encourage necrosis of tissues at confined loci and offer protection against the spread of the virus while others block viral replication.

Home | Site map | Submit Article | Directory | Search