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

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

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Transgenic Plant
Antisense technology

combines genetic material from different species
selectively blocks expression of a gene
combines organelles and cells
alters or transfers cells

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

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