Norway spruce trees weakened by soil drought and progressive die-off of mycorrhizas in root systems become susceptible to infection by rhizomorphs of Armillaria spp. The developing mycelium of this necrotroph induces resin channels in wood, and the induced resin releases some volatile compounds which falsely signal bark beetles that it is safe to invade the host. As a result of the developing beetle outbreak, host trees die, becoming a long-term stock of substrate for the fungus in its saprotrophic stage. This hypothesis is discussed as a fungal survival strategy.

中文翻译：

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青云杉– Armillaria – Ips：策略还是巧合？

挪威的云杉树木因土壤干旱而减弱，根系中的菌根逐渐死亡，因此容易受到蜜环菌属的根瘤菌感染。这种坏死菌的生长菌丝体会在木材中诱导出树脂通道，并且所诱导的树脂会释放出一些挥发性化合物，从而错误地向树皮甲虫发出信号，表明可以安全地入侵宿主。由于甲虫暴发的发展，寄主树死亡，成为腐生阶段真菌的长期基质。该假设被讨论为真菌生存策略。