Disease-inducible promoter sequences have been identified that may be used
to produce transgenic plants that are both more resistant to disease than
control plants, and are wild-type or nearly wild type in appearance. Any
of these disease-inducible promoters may be incorporated into expression
vectors that each comprise a defense response protein operably linked to
the promoter. The expression vectors can be introduced into plants and
the defense response protein then ectopically expressed. Transgenic
plants transformed with many of these expression vectors have been shown
to be more resistant to disease, in some cases, to more than one type of
pathogen, and yet are similar to wild type plants in their morphology and
development.