Transgenic Plant
Antisense technology

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

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

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