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  • Cereals use chemical defenses in a multifunctional manner against different herbivores

    Mercredi, 05 décembre 2018 14:27:16 De: Sciencedaily Dernière modification: Vendredi, 14 décembre, 2018 - 20:53

    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.