Sick plant? Take two aspirin and.... (salicylic acid in plants helps them fight diseases) (Brief Article)

Science News | August 14, 1993| | Copyright

Thanks to the immune system, diseases such as measles make people sick just once, and then the body develops a lifelong resistance to the infection. Plants, too, possess similar defenses. Something called "systemic acquired resistance" allows plants to fight off subsequent attacks not only by the original pathogen but by other infections as well.

For years scientists have suspected that salicylic acid, a chemical similar to aspirin's active ingredient, helped plants develop this resistance. New research has confirmed that hunch and shown that the amount of this ...

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