Hydroxyacetophenone defenses in white spruce against spruce budworm

Genevieve Parent, Claudia Méndez-Espinoza, Isabelle Giguère, Melissa H. Mageroy, Martin Charest, Éric Bauce, Joerg Bohlmann & John MacKay
We review a recently discovered white spruce (Picea glauca) chemical defense against spruce budworm (Choristoneura fumiferana) involving hydroxyacetophenones. These defense metabolites detected in the foliage accumulate variably as the aglycons, piceol and pungenol, or the corresponding glucosides, picein and pungenin. We summarize current knowledge of the genomic, molecular and biochemical as well as genetic underpinnings of this defense and its effects on C. fumiferana. We present an update with new results on the ontogenic variation...
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