Transgenic Plant
Resistance to sulphonyl urea compounds in transgenic tobacco plant has been developed by the transfer of

gene for EPSPS (5-enol-pyruvyl shikimat 3 phosphate synthase)
any of the above
gene for GS (glutamine synthase)
gene for ALS (acetolactate synthase)

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Transgenic Plant
In transgenic plants that have been manipulated to express patho-genesis-related (PR) proteins all the time it has been shown that

these provide no protection at all against pathogens
expression of one PR protein provides high levels of protection against many pathogens
expression of two PR proteins provides some protection against a few pathogens
these proteins trigger the production of other antimicrobial defenses

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