Transgenic Plant
ACC demainase gene is responsible for

degradation of ACC an immediate precursor to ethylene
synthesis of polygalactouranase
synthesis for ethylene
both (a) and (b)

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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
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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