Dahlia Gene Suppresses the Growth of Rice Blast Fungus and Sheath Blight
February 13, 2009| |
Plants possess an impressive arsenal of genes that are involved in their defense against pathogens. These genes encode proteins, such as defensins, that function in pathogen recognition, signal transduction and the activation of defense-associated responses. By introducing Dm-AMP1, a gene that encodes for an antifungal plant defensin from dahlia (Dahlia merckii), scientists from the University Baroda, India developed transgenic rice varieties resistant to the rice blast fungus and sheath blight.
The recombinant protein was found to be specifically expressed in the apoplastic region (diffusional spaces between cells) of plant tissues. Since transgene expression was not accompanied by induction of pathogenesis-related gene expression, the researchers concluded that Dm-AMP1 directly inhibits Magnaporthe oryzae (rice blast fungus) and Rhizoctonia solani (sheath blight).
Subscribers to Transgenic Research can download the complete article through http://dx.doi.org/10.1007/s11248-008-9196-1
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