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Título

Overproduction of salicylic acid in plants by bacterial transgenes enhances pathogen resistance

AutorVerberne, Marianne C.; Verpoorte, Rob; Bol, John F.; Mercado-Blanco, Jesús ; Linthorst, Huub J. M.
Palabras claveSalicylic acid
Systemic acquired resistance
Tobacco
Tobacco mosaic virus
Oidium lycopersicon
PR gene expression
Fecha de publicaciónjul-2000
EditorNature Publishing Group
CitaciónNature Biotechnology 18, 779-783 (2000)
ResumenAfter a hypersensitive response to invading pathogens, plants show elevated accumulation of salicylic acid (SA), induced expression of plant defense genes, and systemic acquired resistance (SAR) to further infection by a broad range of pathogens. There is compelling evidence that SA plays a crucial role in triggering SAR. We have transformed tobacco with two bacterial genes coding for enzymes that convert chorismate into SA by a two-step process. When the two enzymes were targeted to the chloroplasts, the transgenic (CSA, constitutive SA biosynthesis) plants showed a 500- to 1,000-fold increased accumulation of SA and SA glucoside compared to control plants. Defense genes, particularly those encoding acidic pathogenesis-related (PR) proteins, were constitutively expressed in CSA plants. This expression did not affect the plant phenotype, but the CSA plants showed a resistance to viral and fungal infection resembling SAR in nontransgenic plants.
Versión del editorhttp://www.nature.com/nbt/journal/v18/n7/pdf/nbt0700_779.pdf
http://dx.doi.org/10.1038/77347
URIhttp://hdl.handle.net/10261/20705
DOI10.1038/77347
ISSN1087-0156
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