Pinosylvin Methyl Ether Deters Snowshoe Hare Feeding on Green Alder

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Science  02 Dec 1983:
Vol. 222, Issue 4627, pp. 1023-1025
DOI: 10.1126/science.222.4627.1023


Pinosylvin methyl ether (PME), a toxic phenol, is a potent deterrent to showshoe hare feeding on green alder. Concentrations of PME found in green alder parts can account for the low palatability of winter-dormant foliar buds and staminate catkins but cannot affect internode palatability. The lack of a PME-related defense system in internodes suggests that green alder has at least a two-level defense system: defense of growth stages and defense of parts within growth stages.