Specialized neurons in the European bark beetle’s antennae can sense resins the fungi produce in tree resin.
. They also found that the fungus-produced compounds dominated the chemical mixture emitted by the bark samples after 12 days of infection.
Pupae of the European spruce bark beetle in the bark of a Norway spruce tree recently killed by bark beetle attack. CREDIT: Dineshkumar Kandasamy. Additionally, single cell recordings of sensory neurons in the beetles’ antennae revealed that the bugs can detect camphor and thujanol. Behavioral experiments found that the bark beetles were attracted to the bark that had these fungus-produced compounds. The compounds may allow bark beetles to assess the presence of the fungus and find trees that are suitable to eat and breed in.
“The bark beetles currently killing millions of spruce trees every year in Europe are supported in their attacks by fungal associates,” said study co-author Jonathan Gershenzon, a biochemist from the Max Planck Institute for Chemical Ecology, Germany,
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