A research team has begun translating the complex molecular language of petunias. Their grammar and vocabulary are well hidden, however, within the countless proteins and other compounds that fill floral cells. Being rooted to the ground, plants can't run away from insects, pathogens or other threats to their survival.
A research team has begun translating the complex molecular language of petunias. Their grammar and vocabulary are well hidden, however, within the countless proteins and other compounds that fill floral cells. Being rooted to the ground, plants can't run away from insects, pathogens or other threats to their survival. But plant scientists have long known that they do send warnings to each other via scent chemicals called volatile organic compounds.
Plant scientists have long known about this immunization-like priming, but until a few years ago, they had no way to study the process. They needed a marker showing that the plants had detected the volatile compounds. "There are a lot of sugars on the stigma, especially in petunias. It means that bacteria will grow very nicely without these volatiles present," Dudareva said."But if the stigma does not receive tube-produced volatiles, it's also smaller. This was interorgan communication. Now we had a good marker -- stigma size -- to study this communication process."
The team also documented the importance of the karrikin-like pathway in the detection of volatile sesquiterpenes. Many plants use sesquiterpenes to communicate with other plants, among other functions.
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