When a young cedar at the edge of the forest was attacked by bark beetles, Sugiuranorio triggered a cascade. Within 48 hours, the older cedars upstream of the fungus began pumping terpenes and resin into their sap—chemical weapons that made them inedible. The beetles starved before they could spread.
Today, Sugiuranorio is considered a keystone species of ancient Japanese cedar forests. Its presence indicates a forest with unbroken ecological memory. But climate change is now threatening it: higher temperatures disrupt the UV pulsing, and acid rain damages the delicate phloem lattice. sugiuranorio
Dr. Hoshino’s current work involves transplanting Sugiuranorio mycelium into younger forests—trying to give them the memory they lack. It is a slow, careful process, like teaching a child the history of a war they never fought. When a young cedar at the edge of
Dr. Arika Hoshino, a forest mycologist from Kyoto University, first encountered Sugiuranorio during a routine survey of declining cedar roots. She noticed a faint, iridescent purple sheen on the bark of a 1,500-year-old tree. Under her microscope, the sheen resolved into a labyrinth of translucent hyphae—fungal threads so fine they seemed woven from spider silk and moonlight. Today, Sugiuranorio is considered a keystone species of
But the most profound discovery came from a 900-year-old cedar that had been logged and turned into a shrine beam. Even after being detached from its roots, the wood contained dormant Sugiuranorio hyphae. When rehydrated and exposed to modern beetle pheromones, the fungus emitted the same chemical warning signals it had learned centuries ago.
The cedar remembered.