Transgenic Plant
Reducing the expression of pectin methylesterase (PME) has resulted in

plants with resistance to bacteria and fungi
tomato fruit that will not ripen
tomato juice that has higher viscosity
tomato fruit that last longer before they become rotten

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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

expression of one PR protein provides high levels of protection against many pathogens
these provide no protection at all against 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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