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Stressed plants produce aspirin-like chemical

Tuesday, September 23, 2008

Methyl salicylate molecule

Researchers at the National Center for Atmospheric Research have found that stressed plants produce an aspirin-like chemical, methyl salicylate. Methyl salicylate is also known as oil of wintergreen. This semi-volatile plant hormone was detected in the air above the plants in the experiments conducted in a walnut grove near Davis, California. According to the scientists the chemical may be a sort of immune response that help protect the plants.

Acetylsalicylic acid, commonly called aspirin, had originally come from the bark of Willow trees. It had never been observed to be emitted as a gas. The researchers observed spikes in methyl salicylate after nighttime temperatures dipped low, which suggested the plants were reacting to cold stress. The peaks were higher during a dry period, pointing to combined stress of cold nighttime temperatures and mild drought.

These findings show tangible proof that plant-to-plant communication occurs on the ecosystem level.

—Alex Guenther, NCAR scientist

Laboratory observations have shown that numerous plants produce methyl salicylate, but this is the first time the phenomenon has been observed in nature. Previous studies have shown that plants being eaten by animals produce chemicals that can be sensed by other plants. A study conducted in 1997 found that methyl salicylate is produced by tobacco plants inoculated with tobacco mosaic virus. Emitting methyl salicylate may be a means for the plants to warn other plants about a threat.

The finding may help to more readily identify plants under stress by monitoring for the airborne distress signal.


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  This page is archived, and is no longer publicly editable.
Articles presented on Wikinews reflect the specific time at which they were written and published, and do not attempt to encompass events or knowledge which occur or become known after their publication.

Got a correction? Add the template {{editprotected}} to the talk page along with your corrections, and it will be brought to the attention of the administrators.

Please note that due to our archival policy, we will not alter or update the content of articles that are archived, but will only accept requests to make grammatical and formatting corrections.

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