The Internet of Trees

An old song laments, "I talk to the trees, but they don't listen to me." Apparently, however, trees listen to each other. Some of them communicate among themselves by means of a symbiotic fungus connected to their roots:

Plants Talk to Each Other

Mycelia—thin threads that make up the underground portion of mushrooms, far more extensive than the part we see aboveground—"act as a kind of underground internet, linking the roots of different plants." In a symbiotic relationship, mycelia that colonize the roots of plants "help the plants suck up water, and provide nutrients like phosphorus and nitrogen," while the host plant supplies the fungus with nourishment in the form of carbohydrates. The fungus also enhances the host's immune system. In addition, through their mycelial connections some plants "help out their neighbours by sharing nutrients and information – or sabotage unwelcome plants by spreading toxic chemicals through the network." By transferring nutrients such as carbon, phosphorus, and nitrogen, large trees have been found to "help out small, younger ones using the fungal internet."

The article compares this network to the global communication among trees in the 2009 movie AVATAR. The fungal internet also brings to mind Clifford D. Simak's 1965 novel ALL FLESH IS GRASS, which portrays an invasion by a "planetwide biological computer that works through photosynthesis," manifesting in the form of purple flowers, as discussed on this website:

Intelligent Plants in Science Fiction

Do plants in fact have some form of intelligence? A few scientists think they might, according to this article about plant neurobiology:

New Research on Plant Intelligence

Of course, plants don't have neurons. They do, however, display reactions analogous to memory, learning, and response to stress. Their roots shift direction to avoid obstacles without coming into physical contact with the obstruction. Experiments have shown plants producing defensive chemicals when they "hear" a recording of a caterpillar eating a leaf. So it all depends on what we mean by "intelligence."

If we visited a planet dominated by a global hive-mind composed of sentient trees, would we be able to communicate with it? Or would the time scales on which our thought processes operate be too different for mutual comprehension?

Margaret L. Carter

Carter's Crypt