Plant biologists report that a species of tree fern found only in Panama reanimates its own dead leaf fronds, converting them into root structures that feed the mother plant. The fern, Cyathea rojasiana, reconfigures these “zombie leaves,” reversing the flow of water to draw nutrients back into the plant.
The findings are reported in the journal Ecology.
This weird phenomenon occurs only after the leaves die and droop to the ground, said University of Illinois Urbana-Champaign plant biology professor James Dalling, who made the discovery with his team while studying a different plant in a Panamanian forest reserve. Dalling noticed that the fronds were strongly embedded in the soil and had sprouted a network of rootlets. Laboratory tests revealed that the zombie leaves were drawing nitrogen out of the soil.
Read more at University of Illinois at Urbana-Champaign, News Bureau
Image: Plant biology professor James Dalling and his colleagues discovered that some tree ferns recycle their dead fronds into roots. The researchers call these repurposed fronds “zombie leaves.” (Credit: Photo by Fred Zwicky)