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News From the Field

Cereals use chemical defenses in a multifunctional manner against different herbivores


December 5, 2018

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Scientists have characterized multiple functions of benzoxazinoids in wheat: The toxic form of the substances makes the plant directly resistant to lepidopteran larvae, whereas a less toxic form regulates indirect defense mechanisms against aphids. The researchers identified the "switch" between these different functions as a methyltransferase enzyme, which is activated by caterpillar feeding. This switch enables wheat plants to adapt their defense response to different herbivores. Full Story

Source
Max Planck Institute for Chemical Ecology

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